Cretaceous planktonic foraminifera of DSDP Hole 71-511
Lower and Upper Cretaceous sediments of the Maurice Ewing Bank, Site 511 (black shales, mudstones, zeolitic clays, and nannofossil chalk and ooze, 361 m thick) are characterized by an assemblage of planktonic foraminifers of low systematic diversity, including over 50 species. Representatives of Hed...
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1983
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.758342 2023-05-15T18:01:07+02:00 Cretaceous planktonic foraminifera of DSDP Hole 71-511 Krasheninnikov, Valery A Basov, Ivan A LATITUDE: -51.004700 * LONGITUDE: -46.971700 * DATE/TIME START: 1980-01-15T00:00:00 * DATE/TIME END: 1980-01-15T00:00:00 1983-03-15 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.758342 https://doi.org/10.1594/PANGAEA.758342 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.758342 https://doi.org/10.1594/PANGAEA.758342 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Krasheninnikov, Valery A; Basov, Ivan A (1983): Stratigraphy of Cretaceous sediments of the Falkland Plateau based on planktonic foraminifers, Deep Sea Drilling Project, Leg 71. In: Ludwig, WF; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Government Print Office), 71, 789-820, https://doi.org/10.2973/dsdp.proc.71.129.1983 71-511 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/PLATEAU Dataset 1983 ftpangaea https://doi.org/10.1594/PANGAEA.758342 https://doi.org/10.2973/dsdp.proc.71.129.1983 2023-01-20T07:32:06Z Lower and Upper Cretaceous sediments of the Maurice Ewing Bank, Site 511 (black shales, mudstones, zeolitic clays, and nannofossil chalk and ooze, 361 m thick) are characterized by an assemblage of planktonic foraminifers of low systematic diversity, including over 50 species. Representatives of Hedbergella, Globigerinelloides, Archaeoglobigerina, Whiteinella, Rugoglobigerina, and Heterohelix are predominant; species of Ticinella, Praeglobotruncana, Globotruncana, Schackoina, and Planoglobulina associated with some interbeds occur in smaller numbers. Planktonic foraminifers enable us to subdivide the Cretaceous sediments into Barremian-Aptian, Albian, upper Cenomanian, Turonian, Coniacian-Santonian, Santonian, Campanian, and upper Campanian-Maestrichtian intervals. The Lower Cretaceous (Albian) and Upper Cretaceous (upper Cenomanian-Turonian) are separated by a distinct hiatus and unconformity. In the Upper Cretaceous section, a hiatus may be present at the top of the Campanian. The upper Cenomanian-Santonian sediments are reduced in thickness, whereas the Campanian-Maestrichtian interval is expanded. In the Barremian-Aptian black shales, planktonic foraminifers are very rare: they were deposited in shallow water under anoxic conditions. In the Albian, when sedimentation conditions became oxidizing and the depth increased to 200-400 meters, they became more common. By the end of the Upper Cretaceous, depths appear to increase to 2000 meters. In the interbeds of calcareous sediments, planktonic foraminifers are common; in interbeds of zeolitic clays they are rare or absent (dissolution facies). Alternation of these types of sediments is especially characteristic of the Coniacian-lower Campanian, testifying to abrupt CCD fluctuations. The planktonic foraminifers of the Falkland Plateau belong to the Austral Province of the Southern Hemisphere. In their systematic composition they are extremely similar to microfauna of the Boreal Province of the Northern Hemisphere. Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Austral Ewing ENVELOPE(-61.257,-61.257,-69.924,-69.924) Falkland Plateau ENVELOPE(-50.000,-50.000,-51.000,-51.000) Maurice ENVELOPE(-55.817,-55.817,-63.133,-63.133) Maurice Ewing Bank ENVELOPE(-43.500,-43.500,-50.667,-50.667) ENVELOPE(-46.971700,-46.971700,-51.004700,-51.004700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
71-511 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/PLATEAU |
spellingShingle |
71-511 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/PLATEAU Krasheninnikov, Valery A Basov, Ivan A Cretaceous planktonic foraminifera of DSDP Hole 71-511 |
topic_facet |
71-511 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/PLATEAU |
description |
Lower and Upper Cretaceous sediments of the Maurice Ewing Bank, Site 511 (black shales, mudstones, zeolitic clays, and nannofossil chalk and ooze, 361 m thick) are characterized by an assemblage of planktonic foraminifers of low systematic diversity, including over 50 species. Representatives of Hedbergella, Globigerinelloides, Archaeoglobigerina, Whiteinella, Rugoglobigerina, and Heterohelix are predominant; species of Ticinella, Praeglobotruncana, Globotruncana, Schackoina, and Planoglobulina associated with some interbeds occur in smaller numbers. Planktonic foraminifers enable us to subdivide the Cretaceous sediments into Barremian-Aptian, Albian, upper Cenomanian, Turonian, Coniacian-Santonian, Santonian, Campanian, and upper Campanian-Maestrichtian intervals. The Lower Cretaceous (Albian) and Upper Cretaceous (upper Cenomanian-Turonian) are separated by a distinct hiatus and unconformity. In the Upper Cretaceous section, a hiatus may be present at the top of the Campanian. The upper Cenomanian-Santonian sediments are reduced in thickness, whereas the Campanian-Maestrichtian interval is expanded. In the Barremian-Aptian black shales, planktonic foraminifers are very rare: they were deposited in shallow water under anoxic conditions. In the Albian, when sedimentation conditions became oxidizing and the depth increased to 200-400 meters, they became more common. By the end of the Upper Cretaceous, depths appear to increase to 2000 meters. In the interbeds of calcareous sediments, planktonic foraminifers are common; in interbeds of zeolitic clays they are rare or absent (dissolution facies). Alternation of these types of sediments is especially characteristic of the Coniacian-lower Campanian, testifying to abrupt CCD fluctuations. The planktonic foraminifers of the Falkland Plateau belong to the Austral Province of the Southern Hemisphere. In their systematic composition they are extremely similar to microfauna of the Boreal Province of the Northern Hemisphere. |
format |
Dataset |
author |
Krasheninnikov, Valery A Basov, Ivan A |
author_facet |
Krasheninnikov, Valery A Basov, Ivan A |
author_sort |
Krasheninnikov, Valery A |
title |
Cretaceous planktonic foraminifera of DSDP Hole 71-511 |
title_short |
Cretaceous planktonic foraminifera of DSDP Hole 71-511 |
title_full |
Cretaceous planktonic foraminifera of DSDP Hole 71-511 |
title_fullStr |
Cretaceous planktonic foraminifera of DSDP Hole 71-511 |
title_full_unstemmed |
Cretaceous planktonic foraminifera of DSDP Hole 71-511 |
title_sort |
cretaceous planktonic foraminifera of dsdp hole 71-511 |
publisher |
PANGAEA |
publishDate |
1983 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.758342 https://doi.org/10.1594/PANGAEA.758342 |
op_coverage |
LATITUDE: -51.004700 * LONGITUDE: -46.971700 * DATE/TIME START: 1980-01-15T00:00:00 * DATE/TIME END: 1980-01-15T00:00:00 |
long_lat |
ENVELOPE(-61.257,-61.257,-69.924,-69.924) ENVELOPE(-50.000,-50.000,-51.000,-51.000) ENVELOPE(-55.817,-55.817,-63.133,-63.133) ENVELOPE(-43.500,-43.500,-50.667,-50.667) ENVELOPE(-46.971700,-46.971700,-51.004700,-51.004700) |
geographic |
Austral Ewing Falkland Plateau Maurice Maurice Ewing Bank |
geographic_facet |
Austral Ewing Falkland Plateau Maurice Maurice Ewing Bank |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Krasheninnikov, Valery A; Basov, Ivan A (1983): Stratigraphy of Cretaceous sediments of the Falkland Plateau based on planktonic foraminifers, Deep Sea Drilling Project, Leg 71. In: Ludwig, WF; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Government Print Office), 71, 789-820, https://doi.org/10.2973/dsdp.proc.71.129.1983 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.758342 https://doi.org/10.1594/PANGAEA.758342 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.758342 https://doi.org/10.2973/dsdp.proc.71.129.1983 |
_version_ |
1766170455604985856 |