Changes in the physical landscape of SE Raasay at the end of the last Quaternary glaciation are examined. The area is marked by a major fault system defining the Beinn na Leac Fault Block, and field survey shows this to comprise a rollover anticline in the SW, with extensional movement towards the NE along an oblique transfer fault, the Main Beinn na Leac Fault. The fault system was reactivated after the Last Glacial Maximum. Survey of a distinctive ridge of detached scree along the Main Beinn na Leac fault shows it to have involved a single movement of at least 7.12 m vertical displacement, arguably the greatest fault movement since before the Younger Dryas in Scotland. The present work confirms that the scree became detached during the Younger Dryas, but finds that it overlies a lacustrine deposit of at least 5.6 m of laminated sediments from a lake which had begun to accumulate earlier. Radiocarbon dating of peat overlying the lake sediments gave 10 176–10 315 cal years BP, but morphological and stratigraphical evidence indicates that drainage of the lake occurred earlier and only shortly before movement of the scree. Possible causes of displacement at the fault system are briefly discussed.
研究了上一次第四纪冰川作用结束时拉塞东南部自然景观的变化。该地区以一个主要断层系统为标志，该断层系统定义了Beinn na Leac断块，现场调查显示，该断块包括西南部的一个翻转背斜，沿着一个倾斜的转移断层，即主Beinn na Lead断层，向东北方向伸展运动。断层系统在最后一次冰川盛期后重新激活。对Beinn-na-Leac主断层沿线一个独特的分离碎石脊的调查表明，它涉及至少7.12的单一运动 m的垂直位移，可以说是自苏格兰年轻Dryas之前以来最大的断层运动。目前的工作证实，在年轻的Dryas期间，砾石分离，但发现它覆盖在至少5.6的湖泊沉积物上 m来自一个更早开始积累的湖泊的层状沉积物。湖泊沉积物上泥炭的放射性碳年代测定结果为10 176–10 315 cal years BP，但形态学和地层学证据表明，湖泊的排水发生得更早，而且只是在砾石移动之前不久。简要讨论了断层系统位移的可能原因。
{"title":"Deglaciation and neotectonics in SE Raasay, Scottish Inner Hebrides","authors":"David E. Smith, C. Firth, T. Mighall, P. Teasdale","doi":"10.1144/sjg2021-006","DOIUrl":"https://doi.org/10.1144/sjg2021-006","url":null,"abstract":"Changes in the physical landscape of SE Raasay at the end of the last Quaternary glaciation are examined. The area is marked by a major fault system defining the Beinn na Leac Fault Block, and field survey shows this to comprise a rollover anticline in the SW, with extensional movement towards the NE along an oblique transfer fault, the Main Beinn na Leac Fault. The fault system was reactivated after the Last Glacial Maximum. Survey of a distinctive ridge of detached scree along the Main Beinn na Leac fault shows it to have involved a single movement of at least 7.12 m vertical displacement, arguably the greatest fault movement since before the Younger Dryas in Scotland. The present work confirms that the scree became detached during the Younger Dryas, but finds that it overlies a lacustrine deposit of at least 5.6 m of laminated sediments from a lake which had begun to accumulate earlier. Radiocarbon dating of peat overlying the lake sediments gave 10 176–10 315 cal years BP, but morphological and stratigraphical evidence indicates that drainage of the lake occurred earlier and only shortly before movement of the scree. Possible causes of displacement at the fault system are briefly discussed.","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43879397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The informative paper by Carrasquero (2021) reveals the personal contribution made by Francisco Moreno to the success of the 1902–04 Scottish National Antarctic Expedition (SNAE) during the time it spent in Buenos Aires, Argentina. It was a crucial intervention and, for the hospitality and generous assistance that Moreno arranged for the expedition's leader, William Speirs Bruce (Fig. 1), the presentation of a few rock specimens might seem scant reward, although as an additional mark of respect Bruce named Point Moreno on the expedition's published map of Laurie Island (Brown et al. 1906, p. 145): the name is still valid – 60° 44′ S, 44° 41′ W. Bruce would have been deeply satisfied by the knowledge that his donation of specimens from the South Orkney Islands had initiated the development of an Antarctic collection at the Museo de La Plata. His scientific outlook was always international and collaborative. Fig. 1. A cartoon of William Speirs Bruce published in the Buenos Aires magazine El Gladiator , Number 110, January 1904. Moreno's patronage ensured that Bruce was feted as a Polar celebrity during his time in Buenos Aires. From an original held by the Centre for Research Collections, Edinburgh University Library, reproduced under a Creative Commons CC-BY licence. Bruce died in the Liberton Hospital, Edinburgh on 28 October 1921 so it is particularly appropriate in this, his centenary year, that some of his geological contributions should be …
Carrasquero(2021)的这篇信息丰富的论文揭示了弗朗西斯科·莫雷诺(Francisco Moreno)对1902-04年苏格兰国家南极探险队(SNAE)在阿根廷布宜诺斯艾利斯期间的成功所做的个人贡献。这是一次至关重要的干预，对于莫雷诺为探险队队长威廉·斯皮尔·布鲁斯(William Speirs Bruce)安排的热情好客和慷慨援助(图1)，赠送一些岩石标本似乎是微不足道的奖励，尽管作为额外的尊重，布鲁斯在探险队出版的劳里岛地图上命名了莫雷诺点(Brown et al. 1906, p. 145):如果布鲁斯知道他从南奥克尼群岛捐赠的标本开始了拉普拉塔博物馆南极收藏的发展，他一定会非常满意的。他的科学观始终是国际性和合作性的。图1所示。威廉·斯皮尔·布鲁斯的漫画刊登在布宜诺斯艾利斯《角斗士》杂志上，第110期，1904年1月。莫雷诺的赞助确保了布鲁斯在布宜诺斯艾利斯期间被视为极地名人。来自爱丁堡大学图书馆研究收藏中心的原件，在知识共享CC-BY许可下复制。布鲁斯于1921年10月28日在爱丁堡的利伯顿医院去世，因此，在他的百年诞辰之际，他的一些地质学贡献应该……
{"title":"Discussion on ‘The geological collection from the Scottish National Antarctic Expedition (1902–04) in the Museo de La Plata, Argentina’ by Carrasquero 2021 (SJG, 57, 60–66)","authors":"P. Stone","doi":"10.1144/SJG2021-005","DOIUrl":"https://doi.org/10.1144/SJG2021-005","url":null,"abstract":"The informative paper by Carrasquero (2021) reveals the personal contribution made by Francisco Moreno to the success of the 1902–04 Scottish National Antarctic Expedition (SNAE) during the time it spent in Buenos Aires, Argentina. It was a crucial intervention and, for the hospitality and generous assistance that Moreno arranged for the expedition's leader, William Speirs Bruce (Fig. 1), the presentation of a few rock specimens might seem scant reward, although as an additional mark of respect Bruce named Point Moreno on the expedition's published map of Laurie Island (Brown et al. 1906, p. 145): the name is still valid – 60° 44′ S, 44° 41′ W. Bruce would have been deeply satisfied by the knowledge that his donation of specimens from the South Orkney Islands had initiated the development of an Antarctic collection at the Museo de La Plata. His scientific outlook was always international and collaborative. \u0000\u0000\u0000\u0000Fig. 1. \u0000A cartoon of William Speirs Bruce published in the Buenos Aires magazine El Gladiator , Number 110, January 1904. Moreno's patronage ensured that Bruce was feted as a Polar celebrity during his time in Buenos Aires. From an original held by the Centre for Research Collections, Edinburgh University Library, reproduced under a Creative Commons CC-BY licence.\u0000\u0000\u0000\u0000Bruce died in the Liberton Hospital, Edinburgh on 28 October 1921 so it is particularly appropriate in this, his centenary year, that some of his geological contributions should be …","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43523272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Middle Devonian lacustrine sediments of Orkney, off the NE Scottish mainland, are composed largely of the Lower and Upper Stromness formations and overlying Rousay Formation. These three formations have been subdivided and defined by vertebrate biostratigraphic biozones with recent division of the Rousay Formation into three further units based on characteristic fish fossils. The division of the Rousay Formation has enabled a map to be constructed of the solid geology of the island of Westray, Orkney, based on fish identification, detailed logging of sedimentary cycles throughout the Rousay succession, parameters of divisional boundaries, and a survey of faults marking sinistral transtensional movement parallel to the Great Glen Fault. Post-Carboniferous shortening and basin inversion led to uplift, folding and reactivation of normal faults as reverse faults, to form a positive strike-slip flower structure in Westray. A suite of Permian igneous dykes intruded across Orkney include three minor offshoots in Westray. The resulting map is the first to make use of biostratigraphic units within the Rousay Flagstone, which are now regarded as Members.
{"title":"A new geological map and review of the Middle Devonian rocks of Westray and Papa Westray, Orkney, Scotland","authors":"D. Leather","doi":"10.1144/sjg2020-030","DOIUrl":"https://doi.org/10.1144/sjg2020-030","url":null,"abstract":"The Middle Devonian lacustrine sediments of Orkney, off the NE Scottish mainland, are composed largely of the Lower and Upper Stromness formations and overlying Rousay Formation. These three formations have been subdivided and defined by vertebrate biostratigraphic biozones with recent division of the Rousay Formation into three further units based on characteristic fish fossils. The division of the Rousay Formation has enabled a map to be constructed of the solid geology of the island of Westray, Orkney, based on fish identification, detailed logging of sedimentary cycles throughout the Rousay succession, parameters of divisional boundaries, and a survey of faults marking sinistral transtensional movement parallel to the Great Glen Fault. Post-Carboniferous shortening and basin inversion led to uplift, folding and reactivation of normal faults as reverse faults, to form a positive strike-slip flower structure in Westray. A suite of Permian igneous dykes intruded across Orkney include three minor offshoots in Westray. The resulting map is the first to make use of biostratigraphic units within the Rousay Flagstone, which are now regarded as Members.","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48114968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In December 1903, William Speirs Bruce, leader of the Scottish National Antarctic Expedition, arrived in Buenos Aires and contacted Francisco Moreno, director of the Museo de La Plata to request his assistance. Bruce asked Moreno to be an intermediary with the Argentine government and to facilitate Bruce's wish for Argentina to take over the meteorological station that the Scottish expedition had established on Laurie Island (South Orkney Islands). Moreno was please to provide the necessary assistance and was instrumental in Bruce achieving his ambition. As a gesture of appreciation, before leaving Buenos Aires Bruce presented a small collection of Laurie Island rock specimens to Moreno as a donation to the Museo de La Plata. This donation initiated the museum's Antarctic collection.
{"title":"The geological collection from the Scottish National Antarctic Expedition (1902–04) in the Museo de La Plata, Argentina","authors":"S. Carrasquero","doi":"10.1144/sjg2020-029","DOIUrl":"https://doi.org/10.1144/sjg2020-029","url":null,"abstract":"In December 1903, William Speirs Bruce, leader of the Scottish National Antarctic Expedition, arrived in Buenos Aires and contacted Francisco Moreno, director of the Museo de La Plata to request his assistance. Bruce asked Moreno to be an intermediary with the Argentine government and to facilitate Bruce's wish for Argentina to take over the meteorological station that the Scottish expedition had established on Laurie Island (South Orkney Islands). Moreno was please to provide the necessary assistance and was instrumental in Bruce achieving his ambition. As a gesture of appreciation, before leaving Buenos Aires Bruce presented a small collection of Laurie Island rock specimens to Moreno as a donation to the Museo de La Plata. This donation initiated the museum's Antarctic collection.","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45748155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A volcanogenic clay bed (tonstein) has been identified in the Balcomie Beds of the Inverclyde Group near Crail, East Fife. Its chemical composition suggests an undersaturated alkaline magma source. This horizon may be contemporaneous with the early Carboniferous Garleton Hills trachytic lavas of East Lothian (346 Ma). This would make it the earliest expression of Carboniferous volcanism preserved in Fife, and also the earliest occurrence of a tonstein in Fife.
{"title":"Volcaniclastic deposit (tonstein) in the Balcomie Beds, Lower Carboniferous, East Fife","authors":"R. Batchelor","doi":"10.1144/sjg2020-019","DOIUrl":"https://doi.org/10.1144/sjg2020-019","url":null,"abstract":"A volcanogenic clay bed (tonstein) has been identified in the Balcomie Beds of the Inverclyde Group near Crail, East Fife. Its chemical composition suggests an undersaturated alkaline magma source. This horizon may be contemporaneous with the early Carboniferous Garleton Hills trachytic lavas of East Lothian (346 Ma). This would make it the earliest expression of Carboniferous volcanism preserved in Fife, and also the earliest occurrence of a tonstein in Fife.","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47282899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abrasion and plucking are important subglacial erosional processes that create different landforms. This study shows that properties of bedrock control subglacial erosion and bedrock morphology. Softer and less-jointed bedrock favours abrasion, while denser-jointed bedrock and harder bedrock do not. Field work for this study was carried out near Drumnadrochit in Inverness-shire, where the lithology, geology and morphology of rôches moutonnées and crag-and-tails were examined. In this area, the rôches moutonnées, which have an abraded stoss side, are only shaped out of a relatively soft, biotite-rich gneiss, with not much jointing. The crag-and-tails have more densely jointed stoss sides and are shaped out of serpentinite or a harder, more felsic gneiss. Foliation appears not to influence subglacial erosion, since the foliation in rôches moutonnées and crag-and-tails in the study area is similar. Thematic collection: This article is part of the Early Career Research collection available at: https://www.lyellcollection.org/cc/SJG-early-career-research
{"title":"Controls on subglacial bedrock erosion and morphology near Drumnadrochit, Scotland","authors":"M. Jonkman","doi":"10.1144/sjg2020-010","DOIUrl":"https://doi.org/10.1144/sjg2020-010","url":null,"abstract":"Abrasion and plucking are important subglacial erosional processes that create different landforms. This study shows that properties of bedrock control subglacial erosion and bedrock morphology. Softer and less-jointed bedrock favours abrasion, while denser-jointed bedrock and harder bedrock do not. Field work for this study was carried out near Drumnadrochit in Inverness-shire, where the lithology, geology and morphology of rôches moutonnées and crag-and-tails were examined. In this area, the rôches moutonnées, which have an abraded stoss side, are only shaped out of a relatively soft, biotite-rich gneiss, with not much jointing. The crag-and-tails have more densely jointed stoss sides and are shaped out of serpentinite or a harder, more felsic gneiss. Foliation appears not to influence subglacial erosion, since the foliation in rôches moutonnées and crag-and-tails in the study area is similar. Thematic collection: This article is part of the Early Career Research collection available at: https://www.lyellcollection.org/cc/SJG-early-career-research","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46924536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Mississippian succession of Ayrshire, SW Scotland, is rich in fossil crinoids, albeit mainly preserved as fragments. Trearne Quarry is exceptional in yielding moderately common crinoid cups and thecae from certain horizons. To the two nominal taxa that have been documented hitherto, we add a further seven, all cladids with one exception. These species all come from the Blackhall Limestone of the Lower Limestone Formation (Visean, Mississippian). Nominal crinoid species identified from Trearne Quarry include Cladida: Rhabdocrinus scotocarbonarius (Wright), Ureocrinus bockschii (Geinitz), Ureocrinus globulus (de Koninck), Tyrieocrinus laxus Wright, Fifeocrinus tielensis (Wright), Hydreionocrinus formosus Wright, Parazeacrinites konincki (Bather) and Phanocrinus ardrossensis (Wright); and Diplobathrida, Camerata: Cribanocrinus baccatus (Wright). Species have distributions limited to one or a few mudrock beds. Identifiable crinoids are uncommon in massive, coral-rich reefal facies.
{"title":"New records of crinoids from Trearne Quarry SSSI (Mississippian, Lower Carboniferous), north Ayrshire","authors":"Gary Hoare, S. Donovan","doi":"10.1144/sjg2020-012","DOIUrl":"https://doi.org/10.1144/sjg2020-012","url":null,"abstract":"The Mississippian succession of Ayrshire, SW Scotland, is rich in fossil crinoids, albeit mainly preserved as fragments. Trearne Quarry is exceptional in yielding moderately common crinoid cups and thecae from certain horizons. To the two nominal taxa that have been documented hitherto, we add a further seven, all cladids with one exception. These species all come from the Blackhall Limestone of the Lower Limestone Formation (Visean, Mississippian). Nominal crinoid species identified from Trearne Quarry include Cladida: Rhabdocrinus scotocarbonarius (Wright), Ureocrinus bockschii (Geinitz), Ureocrinus globulus (de Koninck), Tyrieocrinus laxus Wright, Fifeocrinus tielensis (Wright), Hydreionocrinus formosus Wright, Parazeacrinites konincki (Bather) and Phanocrinus ardrossensis (Wright); and Diplobathrida, Camerata: Cribanocrinus baccatus (Wright). Species have distributions limited to one or a few mudrock beds. Identifiable crinoids are uncommon in massive, coral-rich reefal facies.","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45477850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In their analysis of temperature data, Watson and Westaway (2020) make substantial use of initial open information provided by the UK Geoenergy Observatory: Glasgow Geothermal Energy Research Field Site. They also offer criticisms on site location, heat resource size, design and costs; however, these criticisms appear to be based on a misunder-standing of the purpose of the Glasgow Observatory. In order to mitigate misapprehensions for future Observatory users, we write in reply. The Glasgow Observatory has been developed as a multidisciplinary research facility; it is not a demonstrator of maximum mine water heat resource, which is by implication what Watson and Westaway (2020) would deem a success.
{"title":"Discussion on ‘Borehole temperature log from the Glasgow Geothermal Energy Research Field Site: a record of past changes to ground surface temperature caused by urban development’, Scottish Journal of Geology, 56, 134-152, https://doi.org/10.1144/sjg2019-033","authors":"A. Monaghan, D. Manning, Z. Shipton","doi":"10.1144/sjg2020-014","DOIUrl":"https://doi.org/10.1144/sjg2020-014","url":null,"abstract":"In their analysis of temperature data, Watson and Westaway (2020) make substantial use of initial open information provided by the UK Geoenergy Observatory: Glasgow Geothermal Energy Research Field Site. They also offer criticisms on site location, heat resource size, design and costs; however, these criticisms appear to be based on a misunder-standing of the purpose of the Glasgow Observatory. In order to mitigate misapprehensions for future Observatory users, we write in reply. The Glasgow Observatory has been developed as a multidisciplinary research facility; it is not a demonstrator of maximum mine water heat resource, which is by implication what Watson and Westaway (2020) would deem a success.","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49655534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kim J. Kean, D. Foffa, Michelaina Johnson, M. Young, Gert Greitens, S. Brusatte
The Jurassic was a key interval for the evolution of dinosaurs, crocodylomorphs and many other vertebrate groups. In recent years, new vertebrate fossils have emerged from the Early–Middle Jurassic of the Isle of Skye, Scotland; however, much more is known about Skye's dinosaur fauna than its crocodylomorphs. Here we report new crocodylomorph material collected from Jurassic marine deposits at Prince Charlie's Cave on the NE coast of Skye. The specimen is a small cobble containing postcranial elements from an individual that is considerably larger in size than previous crocodylomorphs described from Skye. Based on features of the vertebrae and osteoderms, the specimen is assigned to Thalattosuchia, an extinct clade of semi-aquatic/pelagic crocodylomorphs. Specifically, the sub-circular and bean-shaped pit ornamentation on the dorsal surface of the osteoderms in alternating rows suggests affinities with the semi-aquatic lineage Teleosauroidea. Although the ornamentation pattern on the osteoderms is most similar to Macrospondylus (‘Steneosaurus’) bollensis, we conservatively assign the specimen to Teleosauroidea indeterminate. Regardless of its precise affinities and fragmentary nature, the specimen is the first thalattosuchian discovered in Scotland and is the most northerly reported Jurassic thalattosuchian globally, adding to our understanding of the palaeobiogeography and evolution of this group. Thematic collection: This article is part of the Early Career Research collection available at: https://www.lyellcollection.org/cc/SJG-early-career-research
{"title":"First and most northern occurrence of a thalattosuchian crocodylomorph from the Jurassic of the Isle of Skye, Scotland","authors":"Kim J. Kean, D. Foffa, Michelaina Johnson, M. Young, Gert Greitens, S. Brusatte","doi":"10.1144/sjg2020-013","DOIUrl":"https://doi.org/10.1144/sjg2020-013","url":null,"abstract":"The Jurassic was a key interval for the evolution of dinosaurs, crocodylomorphs and many other vertebrate groups. In recent years, new vertebrate fossils have emerged from the Early–Middle Jurassic of the Isle of Skye, Scotland; however, much more is known about Skye's dinosaur fauna than its crocodylomorphs. Here we report new crocodylomorph material collected from Jurassic marine deposits at Prince Charlie's Cave on the NE coast of Skye. The specimen is a small cobble containing postcranial elements from an individual that is considerably larger in size than previous crocodylomorphs described from Skye. Based on features of the vertebrae and osteoderms, the specimen is assigned to Thalattosuchia, an extinct clade of semi-aquatic/pelagic crocodylomorphs. Specifically, the sub-circular and bean-shaped pit ornamentation on the dorsal surface of the osteoderms in alternating rows suggests affinities with the semi-aquatic lineage Teleosauroidea. Although the ornamentation pattern on the osteoderms is most similar to Macrospondylus (‘Steneosaurus’) bollensis, we conservatively assign the specimen to Teleosauroidea indeterminate. Regardless of its precise affinities and fragmentary nature, the specimen is the first thalattosuchian discovered in Scotland and is the most northerly reported Jurassic thalattosuchian globally, adding to our understanding of the palaeobiogeography and evolution of this group. Thematic collection: This article is part of the Early Career Research collection available at: https://www.lyellcollection.org/cc/SJG-early-career-research","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48196087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In his illuminating review of the progress of Robert Jameson’s conversion from Neptunism (promoted by Abraham Werner) to Plutonism (developed from the ideas of James Hutton), Stone (2020) drew extensively on the extant lecture notes taken by some of Jameson’s students between about 1820 and 1833. Mention was made in passing of Jameson’s role as an early proponent of Scottish glaciation, but the secondary literature sources cited have their primary origin in the notes of another of Jameson’s students, James David Forbes (1809–68), which are now held in the Special Collections of the University of St Andrews Library but were not utilized by Stone. James Forbes – not to be confused with the eminent marine biologist, Edward Forbes (1815–54), who succeeded Jameson to the chair of Natural History at the University of Edinburgh in 1854 – was, in the words of his biographer, Frank Cunningham (1990), a ‘pioneer Scottish glaciologist’. Forbes attended Jameson’s lecture course in Natural History at the University of Edinburgh in session 1827–28 and repeated the class in 1828–29. Forbes’ notes provide a valuable complement to those cited by Stone. Cunningham (1990, p. 14) records that, on the basis of Forbes’ notes, Jameson ‘treated his students to a thoroughly Wernerian version of geology’. Forbes’ notes also provide additional constraint to the timing deduced by Stone for Jameson’s conversion; he was a thoroughly Wernerian Neptunist in 1828 but a convert to Plutonism by 1830. With regard to glaciation, Forbes records in his notes from Jameson’s lecture 12 on 27 November 1827:
{"title":"Discussion on ‘Robert Jameson's transition from Neptunism to Plutonism as reflected in his lectures at Edinburgh University, 1820–33’: Scottish Journal of Geology, 56, 85–99, https://doi.org/10.1144/sjg2019-031","authors":"J. Gordon","doi":"10.1144/sjg2020-022","DOIUrl":"https://doi.org/10.1144/sjg2020-022","url":null,"abstract":"In his illuminating review of the progress of Robert Jameson’s conversion from Neptunism (promoted by Abraham Werner) to Plutonism (developed from the ideas of James Hutton), Stone (2020) drew extensively on the extant lecture notes taken by some of Jameson’s students between about 1820 and 1833. Mention was made in passing of Jameson’s role as an early proponent of Scottish glaciation, but the secondary literature sources cited have their primary origin in the notes of another of Jameson’s students, James David Forbes (1809–68), which are now held in the Special Collections of the University of St Andrews Library but were not utilized by Stone. James Forbes – not to be confused with the eminent marine biologist, Edward Forbes (1815–54), who succeeded Jameson to the chair of Natural History at the University of Edinburgh in 1854 – was, in the words of his biographer, Frank Cunningham (1990), a ‘pioneer Scottish glaciologist’. Forbes attended Jameson’s lecture course in Natural History at the University of Edinburgh in session 1827–28 and repeated the class in 1828–29. Forbes’ notes provide a valuable complement to those cited by Stone. Cunningham (1990, p. 14) records that, on the basis of Forbes’ notes, Jameson ‘treated his students to a thoroughly Wernerian version of geology’. Forbes’ notes also provide additional constraint to the timing deduced by Stone for Jameson’s conversion; he was a thoroughly Wernerian Neptunist in 1828 but a convert to Plutonism by 1830. With regard to glaciation, Forbes records in his notes from Jameson’s lecture 12 on 27 November 1827:","PeriodicalId":49556,"journal":{"name":"Scottish Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1144/sjg2020-022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49284027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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