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Bulletin of the Geological Society of Denmark最新文献

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Wood-boring bivalves and boring linings 钻孔双壳类和钻孔衬里
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-14
S. Evans
{"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":null,"pages":null},"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}
引用次数: 24
Bioerosional evidence of rocky palaeoshores in the N eogene of Portugal: environmental and stratigraphical significance 葡萄牙晚第三纪岩石古海岸的生物侵蚀证据:环境和地层意义
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-19
C. Silva, M. Cachäo, J. Martinell, R. Domènech
{"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":null,"pages":null},"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}
引用次数: 10
Commensal association of Corbula gibba (Bivalvia) and a sub-conical boring 长臂猿与次锥形钻孔的共生关系
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-15
J. Nielsen
{"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":null,"pages":null},"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}
引用次数: 2
Foraminiferivory revisited: a preliminary investigation of holes in foraminifera 重访有孔虫象牙:对有孔虫孔洞的初步调查
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-16
K. Nielsen
{"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":null,"pages":null},"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}
引用次数: 10
Bioerosion in the carbonate budget of two Indo-Pacific reefs: La Réunion (Indian Ocean) and Mooréa (Pacific Ocean) 两个印度洋-太平洋珊瑚礁:La r<s:1>(印度洋)和moor<s:1>(太平洋)的碳酸盐收支中的生物侵蚀
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-20
M. P. Clausade, N. Pari, V. Chazottes
{"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":null,"pages":null},"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}
引用次数: 12
Development of microbial euendolithic communities: The influence of light and time 中新石器时代微生物群落的发展:光和时间的影响
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-18
M. Gektidis, Gektidis
{"title":"Development of microbial euendolithic communities: The influence of light and time","authors":"M. Gektidis, Gektidis","doi":"10.37570/bgsd-1998-45-18","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-18","url":null,"abstract":"The importance of euendolithic microbial communities as a palaeontological tool for the reconstruction of ancient sedimentary basin history has been widely ac- knowledged (Golubic et al. 1975, 1984, Vogel et al. 1995, 1996). This tool can be improved by better knowledge of the relationship between modern microendoliths (rock-penetrating microorganisms) and the environmental conditions they thrive in. \u0000The aim of a long-term study conducted on Lee Stocking Island, Bahamas, was to point out factors that control occurrence, distribution and composition of microbial euendolithic populations. The experimental design and first results are published in Radtke 1993, Kiene et al. 1995, Vogel et al. 1996, Gektidis 1997. This paper deals with one aspect of microendolithic development: the progress and change of community structure in time. Microendolithic biocoenoses are excellent bathymetric indicators (Golubic 1975, Gektidis 1997). However their potential use as indicators for different water depths is influenced by the con­tinuous growth of the endolithic communities themselves and the surrounding benthic microflora. This process will have to be taken into consideration when, following a uniformitarian approach, fossil basins are to be reconstructed by analyzing the fossil microendolithic ichno-communities.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889014","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}
引用次数: 28
Mysterious boring hidden within the hinge plates of heterodont bivalves 神秘的无聊隐藏在异质双壳类动物的铰链板
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-21
J. Martinell, R. Domènech, G. Bromley
{"title":"Mysterious boring hidden within the hinge plates of heterodont bivalves","authors":"J. Martinell, R. Domènech, G. Bromley","doi":"10.37570/bgsd-1998-45-21","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-21","url":null,"abstract":"Well-hidden beneath the umbo ofheterodont bivalves, a sack-like boring is etched into the two hinge plates of the opposed valves. The boring is abundant, occurs in numerous host species, ranges from Eocene to today and appears to have world­wide occurrence. The trace fossil is named Umbichnus inopinatus nov. igen. et isp. The nature of the tracemaker remains unknown. The possibility that the struc­ture is a dissolution pit produced by the bivalve itself is discussed.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889263","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}
引用次数: 0
Paleobathymetric reconstructions and fossil microborings 古测深重建和化石微钻孔
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-17
I. Glaub, I. Glaub
{"title":"Paleobathymetric reconstructions and fossil microborings","authors":"I. Glaub, I. Glaub","doi":"10.37570/bgsd-1998-45-17","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-17","url":null,"abstract":"Ichnotaxonomic and paleoecological studies on Jurassic samples resulted in the identification of four micro boring assemblages, called index ichnocoenoses. They are related to specific photic zones or subzones, and therefore are extraordinarily useful for bathymetric reconstructions.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888774","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}
引用次数: 20
Subaerial animal and plant bioerosion in castellated sandstone rocks (Pleistocene to Recent, Czech Republic) 城堡状砂岩的陆上动植物生物侵蚀(捷克共和国更新世至近代)
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1999-01-30 DOI: 10.37570/bgsd-1998-45-25
R. Mikuláš
{"title":"Subaerial animal and plant bioerosion in castellated sandstone rocks (Pleistocene to Recent, Czech Republic)","authors":"R. Mikuláš","doi":"10.37570/bgsd-1998-45-25","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-25","url":null,"abstract":"Rate ofbioerosion in some subaerial settings may compete with that of marine bioerosion. Chief agents are plant root activity and microbe metabolism. How- ever, locally, insects may mine sandstone to produce nesting galleries, while tree trunks, moving in storms, may abrade distinctive and long-lasting grooves in the rock. Examples are described from the Quaternary of the Czech Republic.","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1999-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889126","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}
引用次数: 1
RCNPS/RCNNS 6th Joint Annual Meeting in Denmark RCNPS/RCNNS第六届联合年会在丹麦召开
IF 1.2 4区 地球科学
Bulletin of the Geological Society of Denmark Pub Date : 1998-09-25 DOI: 10.37570/bgsd-1998-45-12
P. F. Konradi, C. Clausen
{"title":"RCNPS/RCNNS 6th Joint Annual Meeting in Denmark","authors":"P. F. Konradi, C. Clausen","doi":"10.37570/bgsd-1998-45-12","DOIUrl":"https://doi.org/10.37570/bgsd-1998-45-12","url":null,"abstract":"The 6th Joint Meeting of the Regional Committee on Northern Neogene Stratigraphy and the Regional Committee on Northern Paleogene Stratigraphy was held in Denmark on 1-5 September 1997. The meet­ing and the subsequent excursion were organised by Peter Konradi and Claus Heilmann-Clausen. ..","PeriodicalId":55310,"journal":{"name":"Bulletin of the Geological Society of Denmark","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1998-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888895","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}
引用次数: 0
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