Pub Date : 2001-12-31DOI: 10.37570/BGSD-2001-48-12
R. Bromley
{"title":"Tetrapod tracks deeply set in unsuitable substrates: Recent musk oxen in fluid earth (East Greenland) and Pleistocene caprines in aeolian sand (Mallorca)","authors":"R. Bromley","doi":"10.37570/BGSD-2001-48-12","DOIUrl":"https://doi.org/10.37570/BGSD-2001-48-12","url":null,"abstract":"","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"48 1","pages":"209-215"},"PeriodicalIF":1.2,"publicationDate":"2001-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889467","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}
Pub Date : 2001-12-31DOI: 10.37570/bgsd-2001-48-15
J. D. Friderichsen
{"title":"Oscar","authors":"J. D. Friderichsen","doi":"10.37570/bgsd-2001-48-15","DOIUrl":"https://doi.org/10.37570/bgsd-2001-48-15","url":null,"abstract":"","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2001-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889582","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}
Pub Date : 2000-02-10DOI: 10.37570/bgsd-1999-46-18
L. Skjernaa
This volume is in honour of Professor Asger Berthelsen on the occasion of his 70th birthday. Asger Berthelsen has made important contributions within the areas of basement geology, tectonics, structural geology, Quaternary geology, salt tectonics and deep seismic interpretations. He is an outstanding writer and illustrator.
{"title":"Festskrift i anledning af professor Asger Berthelsens 70 års fødselsdag den 30. april 1998","authors":"L. Skjernaa","doi":"10.37570/bgsd-1999-46-18","DOIUrl":"https://doi.org/10.37570/bgsd-1999-46-18","url":null,"abstract":"This volume is in honour of Professor Asger Berthelsen on the occasion of his 70th birthday. Asger Berthelsen has made important contributions within the areas of basement geology, tectonics, structural geology, Quaternary geology, salt tectonics and deep seismic interpretations. He is an outstanding writer and illustrator.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"24 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2000-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889934","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}
Pub Date : 1999-12-20DOI: 10.37570/bgsd-1999-46-17
T. Pulvertaft
There seems to be some doubt as to which of the spellings “Paleocene” or “Palaeocene” should be used in manuscripts submitted for publication in Europe, while in North America the spelling “Paleocene” is standard. The latter is not surprising, as in North America the prefix paleo- is also used in terms such as Paleozoic, paleomagnetism, etc. In Europe, however, the prefix derived from the Greek palaios (= ancient, old) is generally spelt “palaeo-”, as for example in palaeontology...................
{"title":"Note “Paleocene” or “Palaeocene”","authors":"T. Pulvertaft","doi":"10.37570/bgsd-1999-46-17","DOIUrl":"https://doi.org/10.37570/bgsd-1999-46-17","url":null,"abstract":"There seems to be some doubt as to which of the spellings “Paleocene” or “Palaeocene” should be used in manuscripts submitted for publication in Europe, while in North America the spelling “Paleocene” is standard. The latter is not surprising, as in North America the prefix paleo- is also used in terms such as Paleozoic, paleomagnetism, etc. In Europe, however, the\u0000prefix derived from the Greek palaios (= ancient, old) is generally spelt “palaeo-”, as for example in palaeontology...................","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"1999-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889878","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}
Pub Date : 1999-05-03DOI: 10.37570/BGSD-1999-46-12
H. Thybo
Crustal structure derived primarily from geophysical investigations reveals features that may be related to the complex tectonic evolution of the Tornquist Fan region. This northwestwards widening splay of Late Carboniferous – Early Permian fault zones in the Danish region emanates from the Teisseyre-Tornquist Zone in northern Poland. Seismic reflections and velocity anomalies image collisional fault zones that formed during the Proterozoic and Palaeozoic amalgamation of the crust. Re-equilibration of Moho appears to have taken place before late Palaeozoic rifting and magmatism initiated the main phase of basin formation that continued into the Mesozoic. The resulting, strong Moho topography, with variation between depths of 26 and 48 km, has been practically “frozen in” since then, although the late Cretaceous – early Cenozoic inversion tectonics may have formed a crustal keel underneath part of the Sorgenfrei-Tornquist Zone which cuts across the Proterozoic crust of the Tornquist Fan region.
{"title":"Crustal structure and tectonic evolution of the Tornquist Fan region as revealed by geophysical methods","authors":"H. Thybo","doi":"10.37570/BGSD-1999-46-12","DOIUrl":"https://doi.org/10.37570/BGSD-1999-46-12","url":null,"abstract":"Crustal structure derived primarily from geophysical investigations reveals features that may be related to the complex tectonic evolution of the Tornquist Fan region. This northwestwards widening splay of Late Carboniferous – Early Permian fault zones in the Danish region emanates from the Teisseyre-Tornquist Zone in northern Poland. Seismic reflections and velocity anomalies image collisional fault zones that formed during the Proterozoic and Palaeozoic amalgamation of the crust. Re-equilibration of Moho appears to have taken place before late Palaeozoic rifting and magmatism initiated the main phase of basin formation that continued into the Mesozoic. The resulting, strong Moho topography, with variation between depths of 26 and 48 km, has been practically “frozen in” since then, although the late Cretaceous – early Cenozoic inversion tectonics may have formed a crustal keel underneath part of the Sorgenfrei-Tornquist Zone which cuts across the Proterozoic crust of the Tornquist Fan region.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"46 1","pages":"145-160"},"PeriodicalIF":1.2,"publicationDate":"1999-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889173","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}
Pub Date : 1999-01-30DOI: 10.37570/bgsd-1998-45-14
S. Evans
The anatomical features and morphology and lining of the borings of woodboring bivalves are evaluated as taxobases. The aragonitic valves and pallets have poorer preservation potential than the calcitic boring linings that some forms secrete. These linings may be septate, containing retrusive caps.
{"title":"Wood-boring bivalves and boring linings","authors":"S. Evans","doi":"10.37570/bgsd-1998-45-14","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-14","url":null,"abstract":"The anatomical features and morphology and lining of the borings of woodboring bivalves are evaluated as taxobases. The aragonitic valves and pallets have poorer preservation potential than the calcitic boring linings that some forms secrete. These linings may be septate, containing retrusive caps.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888504","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}
Pub Date : 1999-01-30DOI: 10.37570/bgsd-1998-45-19
C. Silva, M. Cachäo, J. Martinell, R. Domènech
Occurrences of Neogene rocky shores in Portugal have been identified by help of bioerosion trace fossils. Ichnogenera Gastrochaenolites, Entobia, Caulostrepsis, Maeandropolydora and Trypanites are generally present. The importance of bioeroded surfaces for field recognition of wave-cut platforms, hard substrate marine-flooding surfaces (transgressive surfaces), and of major interruptions (hiatuses) in the stratigraphic record is stressed.
{"title":"Bioerosional evidence of rocky palaeoshores in the N eogene of Portugal: environmental and stratigraphical significance","authors":"C. Silva, M. Cachäo, J. Martinell, R. Domènech","doi":"10.37570/bgsd-1998-45-19","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-19","url":null,"abstract":"Occurrences of Neogene rocky shores in Portugal have been identified by help of bioerosion trace fossils. Ichnogenera Gastrochaenolites, Entobia, Caulostrepsis, Maeandropolydora and Trypanites are generally present. The importance of bioeroded surfaces for field recognition of wave-cut platforms, hard substrate marine-flooding surfaces (transgressive surfaces), and of major interruptions (hiatuses) in the stratigraphic record is stressed.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889103","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}
Pub Date : 1999-01-30DOI: 10.37570/bgsd-1998-45-15
J. Nielsen
An examination of fossil and Recent right valves of the infaunal, suspensionfeeding Corbula gibba (Olivi, 1792) revealed the presence of a slender, sub- conical, unbranched boring. The boring is interpreted as the work of a commensal organism, possible a parasite. Stratigraphic range is from Eocene to Recent.
{"title":"Commensal association of Corbula gibba (Bivalvia) and a sub-conical boring","authors":"J. Nielsen","doi":"10.37570/bgsd-1998-45-15","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-15","url":null,"abstract":"An examination of fossil and Recent right valves of the infaunal, suspensionfeeding Corbula gibba (Olivi, 1792) revealed the presence of a slender, sub- conical, unbranched boring. The boring is interpreted as the work of a commensal organism, possible a parasite. Stratigraphic range is from Eocene to Recent.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888570","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}
Pub Date : 1999-01-30DOI: 10.37570/bgsd-1998-45-16
K. Nielsen
Planktonic and benthonic foraminiferal tests from modem tropical-subtropical marine environments were investigated with regard to bioerosional traces. The traces found on the foraminiferal tests were grouped into 7 different categories. It is suggested that the different traces may be related to different unknown predators of which at least one is planktonic.
{"title":"Foraminiferivory revisited: a preliminary investigation of holes in foraminifera","authors":"K. Nielsen","doi":"10.37570/bgsd-1998-45-16","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-16","url":null,"abstract":"Planktonic and benthonic foraminiferal tests from modem tropical-subtropical marine environments were investigated with regard to bioerosional traces. The traces found on the foraminiferal tests were grouped into 7 different categories. It is suggested that the different traces may be related to different unknown predators of which at least one is planktonic.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888689","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}
Pub Date : 1999-01-30DOI: 10.37570/bgsd-1998-45-20
M. P. Clausade, N. Pari, V. Chazottes
On coral reefs, products of bioerosion through the activity of micro- and macro-boring organisms and grazers are particulate and dissolved carbonate. The con-tribution to bioerosion of the major boring and grazing species was estimated on French Polynesia and the island La Réunion. The influence of bioerosion on the calcification/dissolution budget of reefal waters and on particulate calcium car-bonate fluxes was investigated. Studies on bioerosion were performed in order to assess: (a) eroding activity of grazers through the gut content analysis of echinoids and scarid parrot fish, (b) eroding activity of micro- and macroborers from ex-perimental substrates exposed for one year, and (c) role of sponges in total bioero-sion on reefal and experimental substrates. Calcification/dissolution budget was measured using the alkalinity anomaly technique, and particulate carbonate pro-duction was analysed from trapped sediments.
{"title":"Bioerosion in the carbonate budget of two Indo-Pacific reefs: La Réunion (Indian Ocean) and Mooréa (Pacific Ocean)","authors":"M. P. Clausade, N. Pari, V. Chazottes","doi":"10.37570/bgsd-1998-45-20","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-20","url":null,"abstract":"On coral reefs, products of bioerosion through the activity of micro- and macro-boring organisms and grazers are particulate and dissolved carbonate. The con-tribution to bioerosion of the major boring and grazing species was estimated on French Polynesia and the island La Réunion. The influence of bioerosion on the calcification/dissolution budget of reefal waters and on particulate calcium car-bonate fluxes was investigated. Studies on bioerosion were performed in order to assess: (a) eroding activity of grazers through the gut content analysis of echinoids and scarid parrot fish, (b) eroding activity of micro- and macroborers from ex-perimental substrates exposed for one year, and (c) role of sponges in total bioero-sion on reefal and experimental substrates. Calcification/dissolution budget was measured using the alkalinity anomaly technique, and particulate carbonate pro-duction was analysed from trapped sediments.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889156","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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