Pub Date : 2021-08-24DOI: 10.11648/j.earth.20211004.13
Zhu Suizhou, Wang Zhihao, Jin Zhigang, Li Jianwei, Liu Yun, Zhou Yu, Zhang Qiuhu
Xincheng gold deposit is located in Xincheng Village of Jiaodong, Laizhou Jincheng, near Bohai Bay, and is one of the largest mines in China. The orebodies of Xincheng gold deposit located in Jiaojia fault zone are mainly located in the pyrite sericite-quartzized cataclasite belt and the pyrite-sericite-quartzized granodioritic cataclasite belt under the main fault plane (Fault Gouge). Based on the exploration data and test data, the occurrence characteristics of I and V major orebodies in the deposit are analyzed, and the mining evaluation is made on the basis of the hydrologic and environmental characteristics of the deposit. The results show that the rock of the Orebody, roof and floor is mainly massive igneous rock and Metamorphic Rock, which has high mechanical strength and is hard and semi-hard rock with simple engineering geological conditions The Ore and waste rock are not easy to decompose harmful substances, have no heat harm, the possibility of local surface deformation caused by mining is not big, the circulation of groundwater is bad, the evaporation is big, the water quality is bad, the mined-out area formed by mining has little influence on the stability of rock mass in the mining area. The main ore body in the study area is of good geological environment.
{"title":"The Geological Characteristics and Its Mining Evaluation of Xincheng Gold Deposit in Jiaodong","authors":"Zhu Suizhou, Wang Zhihao, Jin Zhigang, Li Jianwei, Liu Yun, Zhou Yu, Zhang Qiuhu","doi":"10.11648/j.earth.20211004.13","DOIUrl":"https://doi.org/10.11648/j.earth.20211004.13","url":null,"abstract":"Xincheng gold deposit is located in Xincheng Village of Jiaodong, Laizhou Jincheng, near Bohai Bay, and is one of the largest mines in China. The orebodies of Xincheng gold deposit located in Jiaojia fault zone are mainly located in the pyrite sericite-quartzized cataclasite belt and the pyrite-sericite-quartzized granodioritic cataclasite belt under the main fault plane (Fault Gouge). Based on the exploration data and test data, the occurrence characteristics of I and V major orebodies in the deposit are analyzed, and the mining evaluation is made on the basis of the hydrologic and environmental characteristics of the deposit. The results show that the rock of the Orebody, roof and floor is mainly massive igneous rock and Metamorphic Rock, which has high mechanical strength and is hard and semi-hard rock with simple engineering geological conditions The Ore and waste rock are not easy to decompose harmful substances, have no heat harm, the possibility of local surface deformation caused by mining is not big, the circulation of groundwater is bad, the evaporation is big, the water quality is bad, the mined-out area formed by mining has little influence on the stability of rock mass in the mining area. The main ore body in the study area is of good geological environment.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91334825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-18DOI: 10.11648/J.EARTH.20211004.12
V. Shkodzinsky
The obtained evidence of hot heterogeneous accretion of the Earth leads to a fundamentally new solution to genetic problems. According to these data, the kimberlites were formed as a result of the rise of the last residual melts of the bottom peridotite layer of the magmatic ocean, which arose as a result of impact heat release during accretion. The diamond crystallized due to the accumulation of carbon in the residual melts during fractionation. The absence of kimberlites in oceanic and collision regions is due to the expansion of the fractionation products of the magmatic ocean by surfaced mantle plumes during the formation of these regions. The all-earth distribution of the magmatic ocean explains the presence of kimberlites on all the studied ancient platforms. A very high degree of crystallization of the peridotite layer is the reason for the small volume of kimberlite residual melts and the bodies formed by them. The low temperature of kimberlite magmas caused their decompression solidification after boiling at the shallow stage of ascent and explosion under the influence of the high pressure of the fluid phase preserved by solidification. This is the reason for the formation of kimberlite pipes and the absence of kimberlite lavas.
{"title":"Nature of the Features of Kimberlite Placement","authors":"V. Shkodzinsky","doi":"10.11648/J.EARTH.20211004.12","DOIUrl":"https://doi.org/10.11648/J.EARTH.20211004.12","url":null,"abstract":"The obtained evidence of hot heterogeneous accretion of the Earth leads to a fundamentally new solution to genetic problems. According to these data, the kimberlites were formed as a result of the rise of the last residual melts of the bottom peridotite layer of the magmatic ocean, which arose as a result of impact heat release during accretion. The diamond crystallized due to the accumulation of carbon in the residual melts during fractionation. The absence of kimberlites in oceanic and collision regions is due to the expansion of the fractionation products of the magmatic ocean by surfaced mantle plumes during the formation of these regions. The all-earth distribution of the magmatic ocean explains the presence of kimberlites on all the studied ancient platforms. A very high degree of crystallization of the peridotite layer is the reason for the small volume of kimberlite residual melts and the bodies formed by them. The low temperature of kimberlite magmas caused their decompression solidification after boiling at the shallow stage of ascent and explosion under the influence of the high pressure of the fluid phase preserved by solidification. This is the reason for the formation of kimberlite pipes and the absence of kimberlite lavas.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77452941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The return of migrant workers is an important trend in labor mobility in China. The location of the return determines the direction of the flow and affects the choice of settlement. Based on first-hand data from a field survey, statistical analysis and binary logistic analysis methods are used to analyze the location characteristics and influencing factors of the return flow. The study found that (1) returning to the county is the basic spatial feature of the return of migrant workers. Most workers return to villages and counties outside the township. Before returning, most worked in other cities and counties. Counties and small towns near the village have become the main sites for migrant workers’ return to employment. Although the general trend of rural-urban migration has not changed, the intensity has declined to a certain extent. (2) The main reason for return is to take care of the family, followed by old age, difficulty finding a job, low wages and high costs, poor health, etc. In addition, hometown employment conditions have an impact. The push from other places and the local pull work together on migrant workers, eventually producing a return pattern. (3) Most return flow has occurred in the last 5 years, and it has been intensifying. Return flow and outflow are the two basic forms of labor mobility. Under normal circumstances, migrant workers choose to return when they cannot obtain a higher income or cannot find a job. It is foreseeable that as the county-level economy continues to develop, the trend of return will continue to strengthen. (4) Factors such as years of education, skills, working years, number of work sites, family generation, distance from the city, and relative position in the village reached significance in the regression model for the choice to return to the county. Only the family generation coefficient was negative, and the other coefficients were positive. Employment and income and taking care of the family are the main mechanisms influencing migrant workers' return location selection.
{"title":"Return Location of Migrant Workers: A Case Study of 14 Sample Villages in Henan Province, China","authors":"Genghe Gao, Yali Deng, Yidan Yuan, Weili Zhang, Jiaqi Zhang, Menghan Jin","doi":"10.11648/J.EARTH.20211004.11","DOIUrl":"https://doi.org/10.11648/J.EARTH.20211004.11","url":null,"abstract":"The return of migrant workers is an important trend in labor mobility in China. The location of the return determines the direction of the flow and affects the choice of settlement. Based on first-hand data from a field survey, statistical analysis and binary logistic analysis methods are used to analyze the location characteristics and influencing factors of the return flow. The study found that (1) returning to the county is the basic spatial feature of the return of migrant workers. Most workers return to villages and counties outside the township. Before returning, most worked in other cities and counties. Counties and small towns near the village have become the main sites for migrant workers’ return to employment. Although the general trend of rural-urban migration has not changed, the intensity has declined to a certain extent. (2) The main reason for return is to take care of the family, followed by old age, difficulty finding a job, low wages and high costs, poor health, etc. In addition, hometown employment conditions have an impact. The push from other places and the local pull work together on migrant workers, eventually producing a return pattern. (3) Most return flow has occurred in the last 5 years, and it has been intensifying. Return flow and outflow are the two basic forms of labor mobility. Under normal circumstances, migrant workers choose to return when they cannot obtain a higher income or cannot find a job. It is foreseeable that as the county-level economy continues to develop, the trend of return will continue to strengthen. (4) Factors such as years of education, skills, working years, number of work sites, family generation, distance from the city, and relative position in the village reached significance in the regression model for the choice to return to the county. Only the family generation coefficient was negative, and the other coefficients were positive. Employment and income and taking care of the family are the main mechanisms influencing migrant workers' return location selection.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79679711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-01DOI: 10.17704/1944-6187-40.2.365
J. Hartman
Established under the antebellum leadership of Joseph Henry and Spencer Baird, the respect given the Smithsonian Institution had far-reaching effects on budding geological careers and the conservation and curation of fossils at national and state levels. Specifically, F. V. Hayden received sufficient perceived encouragement in his geological and natural history endeavors to prevail under no less than hardship conditions. Consequently, Hayden triumphed on his return from the field in 1856, with specimens that would quickly alter his immediate destiny and that of F. B. Meek. The five documents accepted for publication in 1856 by the Academy of Natural Sciences of Philadelphia produced not only a large number of new species, but Hayden’s northern Great Plains stratigraphy and a biostratigraphic/biochronologic catalog of species original to western studies. Others were now also repeatedly citing Hayden with Meek for non-molluscan specimens based on his collections, with new species named in his honor. The nature of western geological exploration changed because of Hayden’s successful employment as geologist and naturalist to the G. K. Warren and W. F. Raynolds Missouri and Yellowstone expeditions. Onsite, ‘fact-based’ mapping with fossils in stratigraphic sections were arguably now required. No more qualified or experienced individual left the western territories as the Civil War commenced. Meek’s deathbed monograph provided a redescription and the first figures of Meek and Hayden 1856 taxa. Although there are reasons suggested herein, a conundrum exists as to why Meek replaced many 1856 ‘types’ with different specimens, sometimes from different localities. The specimens used in the 1856 Meek and Hayden papers were first unpacked for study by Meek and Hayden in Albany. Shipment of fossils from field to museum, however, was not without peril. The presumption is that the specimens accompanied Meek when he moved to Washington in 1858. A National Museum sponsored and implemented program fostered an ever-expanding ‘duplicate’ distribution of specimens to national and international institutions. Henry and Baird were dedicated to this program. Starting in 1861, surplus fossil invertebrates were removed from National Museum holdings. Many thousands of specimens were transferred, with nearly one thousand specimens documented in a single shipment to one institution. How much of the Hayden collection was affected and how many types were redistributed is as of yet unknown. The remaining Hayden collection in the National Museum is pared-down to type and figured specimens. Hayden’s ‘buckets’ of specimens are being, in some cases, slowly virtually repatriated.
史密森学会是在南北战争前约瑟夫·亨利和斯宾塞·贝尔德的领导下建立的，人们对它的尊重对萌芽中的地质学事业以及国家和州一级的化石保护和管理产生了深远的影响。具体来说，海登在地质和自然历史方面的努力得到了足够的鼓励，他在艰苦的条件下取得了胜利。因此，海登在1856年从野外归来时取得了胜利，他的标本很快改变了他和F. B. Meek的命运。1856年费城自然科学院接受出版的五份文件不仅产生了大量的新物种，而且还产生了海登的北部大平原地层学和生物地层学/生物年代学的物种目录，这些物种是西方研究的原始物种。其他人现在也反复引用海登和米克的非软体动物标本，并以他的名字命名新物种。由于海登作为地质学家和博物学家成功地加入了g·k·沃伦和w·f·雷诺兹的密苏里和黄石探险队，西部地质勘探的性质发生了变化。在现场，“基于事实”的地层剖面化石测绘可以说是现在需要的。内战开始时，没有更多有资格或有经验的人离开西部领土。Meek的临终专著提供了Meek和Hayden 1856分类群的重新描述和第一个数字。虽然这里提出了一些原因，但一个难题仍然存在，即为什么Meek用不同的标本替换了许多1856年的“类型”，有时来自不同的地区。1856年米克和海登论文中使用的标本首先由米克和海登在奥尔巴尼拆箱研究。然而，把化石从野外运到博物馆并非没有危险。据推测，这些标本是米克1858年搬到华盛顿时随身携带的。一个由国家博物馆赞助并实施的项目促进了不断扩大的标本“复制”分布到国家和国际机构。亨利和贝尔德致力于这个项目。从1861年开始，多余的无脊椎动物化石从国家博物馆馆藏中移走。成千上万的标本被转移，其中近1000个标本被记录在一次运往一个机构的货物中。海登的藏品中有多少受到了影响，又有多少被重新分配，目前还不得而知。海登在国家博物馆的剩余藏品被削减为打字和图形标本。海登的“一桶桶”标本，在某些情况下，实际上正在慢慢地遣返回国。
{"title":"THE IMPORTANCE OF THE MUSEUM IN ANTEBELLUM U.S. WESTERN TERRITORIAL EXPLORATION: PART 2. THE ROLES OF HAYDEN AND MEEK IN A PARADIGM SHIFT IN GEOLOGIC AND PALEONTOLOGIC STUDIES","authors":"J. Hartman","doi":"10.17704/1944-6187-40.2.365","DOIUrl":"https://doi.org/10.17704/1944-6187-40.2.365","url":null,"abstract":"Established under the antebellum leadership of Joseph Henry and Spencer Baird, the respect given the Smithsonian Institution had far-reaching effects on budding geological careers and the conservation and curation of fossils at national and state levels. Specifically, F. V. Hayden received sufficient perceived encouragement in his geological and natural history endeavors to prevail under no less than hardship conditions. Consequently, Hayden triumphed on his return from the field in 1856, with specimens that would quickly alter his immediate destiny and that of F. B. Meek. The five documents accepted for publication in 1856 by the Academy of Natural Sciences of Philadelphia produced not only a large number of new species, but Hayden’s northern Great Plains stratigraphy and a biostratigraphic/biochronologic catalog of species original to western studies. Others were now also repeatedly citing Hayden with Meek for non-molluscan specimens based on his collections, with new species named in his honor. The nature of western geological exploration changed because of Hayden’s successful employment as geologist and naturalist to the G. K. Warren and W. F. Raynolds Missouri and Yellowstone expeditions. Onsite, ‘fact-based’ mapping with fossils in stratigraphic sections were arguably now required. No more qualified or experienced individual left the western territories as the Civil War commenced.\u0000 Meek’s deathbed monograph provided a redescription and the first figures of Meek and Hayden 1856 taxa. Although there are reasons suggested herein, a conundrum exists as to why Meek replaced many 1856 ‘types’ with different specimens, sometimes from different localities. The specimens used in the 1856 Meek and Hayden papers were first unpacked for study by Meek and Hayden in Albany. Shipment of fossils from field to museum, however, was not without peril. The presumption is that the specimens accompanied Meek when he moved to Washington in 1858.\u0000 A National Museum sponsored and implemented program fostered an ever-expanding ‘duplicate’ distribution of specimens to national and international institutions. Henry and Baird were dedicated to this program. Starting in 1861, surplus fossil invertebrates were removed from National Museum holdings. Many thousands of specimens were transferred, with nearly one thousand specimens documented in a single shipment to one institution. How much of the Hayden collection was affected and how many types were redistributed is as of yet unknown. The remaining Hayden collection in the National Museum is pared-down to type and figured specimens. Hayden’s ‘buckets’ of specimens are being, in some cases, slowly virtually repatriated.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44192033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-01DOI: 10.17704/1944-6187-40.2.461
A. Şengör
The very first scientific paper by the great Austrian geologist Eduard Suess (1831–1914), the dean of geologists internationally during his lifetime, treats the graptolites of Bohemia (the ‘Barrandian’). This paper and most of his subsequent papers on palaeontology are accompanied by superb drawings of his observations in which Suess took great care not to insert himself between Nature as he perceived it in the framework of the knowledge of his day and his readers. In his drawings, he exercised what the great German geologist Hans Cloos later called ‘the art of leaving out’. This meant that in the drawings, the parts not relevant to the discussion are left only in outline, whereas parts he wished to highlight are brought to the fore by careful shading; but even the parts left only in outline are not schematic, instead they are careful reconstructions true to Nature as much as the material allowed it. This characteristic of Suess’ illustrations is seen also in his later field sketches concerning stratigraphy and structural geology and also in his depiction of the large tectonic features of our globe representing a guide to his manner of thinking. His illustrations in his early palaeontological work foreshadowed the later global geologist’s approach to our planet (and the Moon!) as a whole.
{"title":"EDUARD SUESS AND PALAEONTOLOGY: HIS ILLUSTRATIONS","authors":"A. Şengör","doi":"10.17704/1944-6187-40.2.461","DOIUrl":"https://doi.org/10.17704/1944-6187-40.2.461","url":null,"abstract":"The very first scientific paper by the great Austrian geologist Eduard Suess (1831–1914), the dean of geologists internationally during his lifetime, treats the graptolites of Bohemia (the ‘Barrandian’). This paper and most of his subsequent papers on palaeontology are accompanied by superb drawings of his observations in which Suess took great care not to insert himself between Nature as he perceived it in the framework of the knowledge of his day and his readers. In his drawings, he exercised what the great German geologist Hans Cloos later called ‘the art of leaving out’. This meant that in the drawings, the parts not relevant to the discussion are left only in outline, whereas parts he wished to highlight are brought to the fore by careful shading; but even the parts left only in outline are not schematic, instead they are careful reconstructions true to Nature as much as the material allowed it. This characteristic of Suess’ illustrations is seen also in his later field sketches concerning stratigraphy and structural geology and also in his depiction of the large tectonic features of our globe representing a guide to his manner of thinking. His illustrations in his early palaeontological work foreshadowed the later global geologist’s approach to our planet (and the Moon!) as a whole.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43793639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-01DOI: 10.17704/1944-6187-40.2.293
G. B. Vai
Anniversaries for the two founding fathers of geology occurring in the same year prompted a comparative evaluation of how the two contributed to establishing the basic principles of the discipline. To do so, passages from their publications, codices and manuscripts have been quoted directly. The Stenonian principles (‘original horizontality’, ‘original continuity’, and ‘superposition of individual strata’) are present in Leonardo’s notebooks amazingly formulated, using similar wording when studying the same area more than 150 years earlier. Also, Stenonian priority in naming and explaining geological concepts and processes (e.g., faulting, folding, angular unconformity, relative chronology) are mirrored in Leonardo’s writings and pictorial works. While Steno enjoys priority in stepwise restoration of the geological history of a given region, Leonardo was the first to construct a 3D geological profile representation and geomorphologic maps. Lastly, the paper focuses on diverging stances of the two savants about the Noachian Deluge and the age of the Earth. Already 500 years ago, Leonardo had solved the question of marine fossil remains of organic origin found in the mountains implying the possibility of deep geologic time in a statement of ‘eternalism’. 350 years ago, Steno solved the same question in a different way in which he retained a basic role for the Deluge and assumed a short age for the Earth by focusing mainly on short-lived sedimentary and geomorphologic processes.
{"title":"LEONARDO DA VINCI’S AND NICOLAUS STENO’S GEOLOGY","authors":"G. B. Vai","doi":"10.17704/1944-6187-40.2.293","DOIUrl":"https://doi.org/10.17704/1944-6187-40.2.293","url":null,"abstract":"Anniversaries for the two founding fathers of geology occurring in the same year prompted a comparative evaluation of how the two contributed to establishing the basic principles of the discipline. To do so, passages from their publications, codices and manuscripts have been quoted directly. The Stenonian principles (‘original horizontality’, ‘original continuity’, and ‘superposition of individual strata’) are present in Leonardo’s notebooks amazingly formulated, using similar wording when studying the same area more than 150 years earlier. Also, Stenonian priority in naming and explaining geological concepts and processes (e.g., faulting, folding, angular unconformity, relative chronology) are mirrored in Leonardo’s writings and pictorial works. While Steno enjoys priority in stepwise restoration of the geological history of a given region, Leonardo was the first to construct a 3D geological profile representation and geomorphologic maps. Lastly, the paper focuses on diverging stances of the two savants about the Noachian Deluge and the age of the Earth. Already 500 years ago, Leonardo had solved the question of marine fossil remains of organic origin found in the mountains implying the possibility of deep geologic time in a statement of ‘eternalism’. 350 years ago, Steno solved the same question in a different way in which he retained a basic role for the Deluge and assumed a short age for the Earth by focusing mainly on short-lived sedimentary and geomorphologic processes.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44093950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-01DOI: 10.17704/1944-6187-40.2.538
Bento Cavadas
Plate tectonics caused a revolution within earth sciences which then was transposed into science textbooks. The main objective of this paper is to explore how plate tectonics influenced Portuguese and Spanish science textbooks published from the 1960s through the 1980s. For this purpose, a qualitative method based on the concept of didactic transposition is used. The didactic transposition of seafloor spreading evidence such as ridges, rifts and trenches, transform faults, seafloor sediments, the age of seafloor basaltic rocks, the magnetic anomalies on the seafloor, the Benioff zones and the subduction process, and also the didactic transposition of the formation of mountains ranges and island arcs, convection currents, plate tectonics concepts, boundaries and motion, and plate tectonics acceptance are studied in a comprehensive sample of science textbooks. The analysis of textbooks shows that the didactic transposition of seafloor spreading, and plate tectonics started mainly in 1970s Portuguese and Spanish textbooks and had a strong development in 1980s textbooks. No major differences were found between the approaches to plate tectonics in similar age Portuguese and Spanish textbooks. At the beginning of the 1970s, textbooks presented partial evidence for seafloor spreading, such as magnetic anomalies and the characteristics of ridges, rifts and trenches. They also addressed convection currents but only those that were related to geosynclines. In the mid 1970s and in the 1980s, textbooks presented more comprehensive evidence of seafloor spreading, by adding didactical transpositions of transform faults, seafloor sediments and the age of seafloor rocks. They also presented in more detail topics such as magnetic anomalies, the Benioff zones, orogenic processes and the tectonic significance of ridges, rifts and trenches. Plate tectonic theory was presented in major textbooks as widely accepted, and discussions about speculative facts or processes were rare.
{"title":"PLATE TECTONICS IN PORTUGUESE AND SPANISH SCIENCE TEXTBOOKS: FROM THE 1960s TO THE 1980s","authors":"Bento Cavadas","doi":"10.17704/1944-6187-40.2.538","DOIUrl":"https://doi.org/10.17704/1944-6187-40.2.538","url":null,"abstract":"Plate tectonics caused a revolution within earth sciences which then was transposed into science textbooks. The main objective of this paper is to explore how plate tectonics influenced Portuguese and Spanish science textbooks published from the 1960s through the 1980s. For this purpose, a qualitative method based on the concept of didactic transposition is used. The didactic transposition of seafloor spreading evidence such as ridges, rifts and trenches, transform faults, seafloor sediments, the age of seafloor basaltic rocks, the magnetic anomalies on the seafloor, the Benioff zones and the subduction process, and also the didactic transposition of the formation of mountains ranges and island arcs, convection currents, plate tectonics concepts, boundaries and motion, and plate tectonics acceptance are studied in a comprehensive sample of science textbooks. The analysis of textbooks shows that the didactic transposition of seafloor spreading, and plate tectonics started mainly in 1970s Portuguese and Spanish textbooks and had a strong development in 1980s textbooks. No major differences were found between the approaches to plate tectonics in similar age Portuguese and Spanish textbooks. At the beginning of the 1970s, textbooks presented partial evidence for seafloor spreading, such as magnetic anomalies and the characteristics of ridges, rifts and trenches. They also addressed convection currents but only those that were related to geosynclines. In the mid 1970s and in the 1980s, textbooks presented more comprehensive evidence of seafloor spreading, by adding didactical transpositions of transform faults, seafloor sediments and the age of seafloor rocks. They also presented in more detail topics such as magnetic anomalies, the Benioff zones, orogenic processes and the tectonic significance of ridges, rifts and trenches. Plate tectonic theory was presented in major textbooks as widely accepted, and discussions about speculative facts or processes were rare.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45214209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-01DOI: 10.17704/1944-6187-40.2.503
E. Rose
Malta, an island in the central Mediterranean Sea, was fortified as a base for the Knights Hospitaller 1530–1798 and to provide major harbours for the British Royal Navy after 1813. Men with British military associations (all subsequently to attain some distinction in public and/or academic life) were amongst the many pioneers of Maltese geology who established the essence of its outcrop stratigraphy and structure: a circa 300-metre-thick sequence of near-horizontal mid-Cenozoic fossiliferous limestones punctuated by a ‘blue clay/marl’, cut by a series of major faults and penetrated by several caves and fissures whose infill contained significant remains of Pleistocene vertebrates. Between 1843 and 1856, Lieutenant (later Vice-Admiral) Thomas Abel Brimage Spratt (1811–1888) defined major units in the bedrock sequence, Colonel (later Major-General) Sir William Reid (1791–1858) promoted publication of a geological memoir, and a 1:31,680-scale geological map prepared by the 3rd Earl of Ducie on a Royal Engineers topographical base map was published under Royal Engineer auspices. Mostly between 1860 and 1866, Captain (later Professor) Frederick Wollaston Hutton (1836–1905) and Surgeon (later Deputy Surgeon-General and Professor) Andrew Leith Adams (1827–1882) made field observations that refined earlier interpretations of stratigraphy and structure and generated revised but small-scale maps. They also collected specimens that facilitated specialist identifications of Malta’s fossil faunas, including foraminifera by Thomas Rupert Jones (1819–1911), Professor of Geology at the Royal Military College, Sandhurst. Rock specimens were sent in 1888 by Surgeon-Captain David (later Surgeon-General Sir David) Bruce (1855–1931) and the former engineer Lieutenant (and later Professor) Osbert Chadwick (1844–1913) to the pioneer oceanographer John (later Sir John) Murray (1841–1914). They stimulated Murray’s benchmark study 1889–1890 of Malta’s sedimentary sequence and fossil foraminifera, and their palaeoenvironmental interpretation, plus his compilation of a 1:129,254-scale geological map. These prompted extensive local studies and collection of macrofossil specimens by schoolmaster (later Lieutenant-Colonel) John Henry Cooke (1862–1933). By the end of the century, representative Maltese fossils had been presented for specialist study and identification or description to major museums in England, Scotland and Italy, facilitating improved correlation of Maltese strata with Oligo-Miocene successions elsewhere.
马耳他是地中海中部的一个岛屿，1530年至1798年被加固为医院骑士团的基地，1813年后为英国皇家海军提供了主要港口。拥有英国军事协会的人（后来都在公共和/或学术生活中获得了一些成就）是马耳他地质学的许多先驱之一，他们确立了其露头地层和结构的本质：大约300米厚的近水平中新生代含化石石灰岩序列，中间点缀着“蓝色粘土/泥灰岩”，被一系列主要断层切割，并被几个洞穴和裂缝穿透，这些洞穴和裂缝的填充物中有更新世脊椎动物的重要遗迹。1843年至1856年间，中尉（后来的海军中将）Thomas Abel Brimage Spratt（1811–1888）定义了基岩序列中的主要单位，上校（后来的少将）William Reid爵士（1791–1858）推动出版了一本地质回忆录，在皇家工程师的主持下，第三代杜西伯爵在皇家工程师地形基准图上绘制了一幅1:31680比例尺的地质图。主要在1860年至1866年间，弗雷德里克·沃拉斯顿·赫顿上尉（后来的教授）（1836年至1905年）和外科医生（后来的副外科医生兼教授）安德鲁·莱思·亚当斯（1827年至1882年）进行了实地观察，完善了早期对地层学和结构的解释，并生成了经过修订但规模较小的地图。他们还收集了便于专家鉴定马耳他动物化石的标本，包括桑赫斯特皇家军事学院地质学教授托马斯·鲁珀特·琼斯（1819–1911）的有孔虫。岩石标本于1888年由外科医生David上尉（后来的外科医生David爵士）Bruce（1855–1931）和前工程师中尉（后来的教授）Osbert Chadwick（1844–1913）发送给先驱海洋学家John（后来的John爵士）Murray（1841–1914）。他们激发了Murray对1889–1890年马耳他沉积序列和有孔虫化石的基准研究，以及对其古环境的解释，以及他编制的1:129254比例的地质图。这些促使校长（后来的中校）约翰·亨利·库克（1862-1933）在当地进行了广泛的研究并收集了宏观化石标本。到本世纪末，代表性的马耳他化石已被提交给英格兰、苏格兰和意大利的主要博物馆进行专业研究、鉴定或描述，这有助于改善马耳他地层与其他地方渐新世-中新世序列的相关性。
{"title":"BRITISH MILITARY CONTRIBUTIONS TO THE GEOLOGY OF MALTA, PART 1: NINETEENTH CENTURY FOUNDATIONS","authors":"E. Rose","doi":"10.17704/1944-6187-40.2.503","DOIUrl":"https://doi.org/10.17704/1944-6187-40.2.503","url":null,"abstract":"Malta, an island in the central Mediterranean Sea, was fortified as a base for the Knights Hospitaller 1530–1798 and to provide major harbours for the British Royal Navy after 1813. Men with British military associations (all subsequently to attain some distinction in public and/or academic life) were amongst the many pioneers of Maltese geology who established the essence of its outcrop stratigraphy and structure: a circa 300-metre-thick sequence of near-horizontal mid-Cenozoic fossiliferous limestones punctuated by a ‘blue clay/marl’, cut by a series of major faults and penetrated by several caves and fissures whose infill contained significant remains of Pleistocene vertebrates. Between 1843 and 1856, Lieutenant (later Vice-Admiral) Thomas Abel Brimage Spratt (1811–1888) defined major units in the bedrock sequence, Colonel (later Major-General) Sir William Reid (1791–1858) promoted publication of a geological memoir, and a 1:31,680-scale geological map prepared by the 3rd Earl of Ducie on a Royal Engineers topographical base map was published under Royal Engineer auspices. Mostly between 1860 and 1866, Captain (later Professor) Frederick Wollaston Hutton (1836–1905) and Surgeon (later Deputy Surgeon-General and Professor) Andrew Leith Adams (1827–1882) made field observations that refined earlier interpretations of stratigraphy and structure and generated revised but small-scale maps. They also collected specimens that facilitated specialist identifications of Malta’s fossil faunas, including foraminifera by Thomas Rupert Jones (1819–1911), Professor of Geology at the Royal Military College, Sandhurst. Rock specimens were sent in 1888 by Surgeon-Captain David (later Surgeon-General Sir David) Bruce (1855–1931) and the former engineer Lieutenant (and later Professor) Osbert Chadwick (1844–1913) to the pioneer oceanographer John (later Sir John) Murray (1841–1914). They stimulated Murray’s benchmark study 1889–1890 of Malta’s sedimentary sequence and fossil foraminifera, and their palaeoenvironmental interpretation, plus his compilation of a 1:129,254-scale geological map. These prompted extensive local studies and collection of macrofossil specimens by schoolmaster (later Lieutenant-Colonel) John Henry Cooke (1862–1933). By the end of the century, representative Maltese fossils had been presented for specialist study and identification or description to major museums in England, Scotland and Italy, facilitating improved correlation of Maltese strata with Oligo-Miocene successions elsewhere.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49518224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-01DOI: 10.17704/1944-6187-40.2.332
Gregory Todd
This contribution, in two parts, addresses a long-standing problem in the history of geology: Was the geological theory of James Hutton derived inductively from observations and scientific knowledge, or was it derived a priori as a speculative system? Hutton’s own writings do little to clarify the question, and the conflict in interpretations has remained at an impasse. This contribution proposes to resolve that conflict by focusing on the two years Hutton spent as a young man studying chemistry in Paris. I argue that Hutton studied with one of the great chemistry teachers of the eighteenth century, Guillaume-François Rouelle, and that Rouelle’s teachings provided the foundations of Hutton’s geological theory. Part One of this contribution reviewed evidence that Hutton was a student of Rouelle’s, and concluded with a high degree of confidence, but less than certainty, that Hutton did study with Rouelle. In this Part Two, it is argued that Hutton adopted almost all the geological ideas found in Rouelle’s lectures. This Part Two also proposes a reconstruction of the development of Hutton’s cyclical model of Earth strata, taken as the starting point of his broader theory, to show that it developed from observations and inductions, and his study with Rouelle, and was not developed as an a priori system. That conclusion will require a new interpretation of Hutton’s theory, which should now be understood as part of a continuum of geological knowledge developing during the eighteenth century.
{"title":"THE FRENCH FOUNDATIONS OF HUTTON’S THEORY OF THE EARTH, PART TWO: HUTTON’S DEBTS TO ROUELLE","authors":"Gregory Todd","doi":"10.17704/1944-6187-40.2.332","DOIUrl":"https://doi.org/10.17704/1944-6187-40.2.332","url":null,"abstract":"This contribution, in two parts, addresses a long-standing problem in the history of geology: Was the geological theory of James Hutton derived inductively from observations and scientific knowledge, or was it derived a priori as a speculative system? Hutton’s own writings do little to clarify the question, and the conflict in interpretations has remained at an impasse. This contribution proposes to resolve that conflict by focusing on the two years Hutton spent as a young man studying chemistry in Paris. I argue that Hutton studied with one of the great chemistry teachers of the eighteenth century, Guillaume-François Rouelle, and that Rouelle’s teachings provided the foundations of Hutton’s geological theory.\u0000 Part One of this contribution reviewed evidence that Hutton was a student of Rouelle’s, and concluded with a high degree of confidence, but less than certainty, that Hutton did study with Rouelle. In this Part Two, it is argued that Hutton adopted almost all the geological ideas found in Rouelle’s lectures. This Part Two also proposes a reconstruction of the development of Hutton’s cyclical model of Earth strata, taken as the starting point of his broader theory, to show that it developed from observations and inductions, and his study with Rouelle, and was not developed as an a priori system. That conclusion will require a new interpretation of Hutton’s theory, which should now be understood as part of a continuum of geological knowledge developing during the eighteenth century.","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44005433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-01DOI: 10.17704/1944-6187-40.2.i
R. Clary, David I. Spanagel, Michael S. Smith, J. Diemer
{"title":"CONTENTS, LETTERS FROM THE PRESIDENT, TREASURER, SECRETARY AND EDITOR'S INTRODUCTION","authors":"R. Clary, David I. Spanagel, Michael S. Smith, J. Diemer","doi":"10.17704/1944-6187-40.2.i","DOIUrl":"https://doi.org/10.17704/1944-6187-40.2.i","url":null,"abstract":"","PeriodicalId":50560,"journal":{"name":"Earth Sciences History","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45167791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"哲学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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