Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic
Spatial and temporal patterns in test size and shape (test conicity and spiral roundness) and absolute abundance (accumulation rate) of the planktonic foraminifer Contusotruncana contusa were studied in the South Atlantic Ocean (DSDP sites 356, 516, 525 and 527) during an interval corresponding to t...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.704985 2023-05-15T17:34:47+02:00 Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic Kucera, Michal Malmgren, Bjorn MEDIAN LATITUDE: -21.221178 * MEDIAN LONGITUDE: -21.656900 * SOUTH-BOUND LATITUDE: -30.276500 * WEST-BOUND LONGITUDE: -51.663300 * NORTH-BOUND LATITUDE: 40.360800 * EAST-BOUND LONGITUDE: 2.985300 * DATE/TIME START: 1974-11-16T00:00:00 * DATE/TIME END: 1980-06-28T00:00:00 1998-10-02 application/zip, 9 datasets https://doi.pangaea.de/10.1594/PANGAEA.704985 https://doi.org/10.1594/PANGAEA.704985 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.704985 https://doi.org/10.1594/PANGAEA.704985 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Kucera, Michal; Malmgren, Bjorn (1998): Terminal Cretaceous warming event in the mid-latitude South Atlantic Ocean: evidence from poleward migration of Contusotruncana contusa (planktonic foraminifera) morphotypes. Palaeogeography, Palaeoclimatology, Palaeoecology, 138(1-4), 1-15, https://doi.org/10.1016/S0031-0182(97)00124-7 39-356 43-384 72-516F 74-525A 74-527 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg39 Leg43 Leg72 Leg74 North Atlantic/RIDGE South Atlantic South Atlantic/CONT RISE South Atlantic/CREST South Atlantic/PLATEAU Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.704985 https://doi.org/10.1016/S0031-0182(97)00124-7 2023-01-20T07:31:14Z Spatial and temporal patterns in test size and shape (test conicity and spiral roundness) and absolute abundance (accumulation rate) of the planktonic foraminifer Contusotruncana contusa were studied in the South Atlantic Ocean (DSDP sites 356, 516, 525 and 527) during an interval corresponding to the last 800 kyr of the Cretaceous. The variation in absolute abundance of C. contusa was characterised by alternating periods of high and low abundance; some of these periods were traceable across the entire mid-latitude South Atlantic Ocean. While the mean spiral roundness did not show any interpretable patterns, a sudden increase of the mean test size and mean test conicity occurred between 65.3 and 65.2 Ma (based on linear interpolation within the Cretaceous part of Subchron C29R) at all sites studied, indicating a poleward migration followed by rapid withdrawal of the low-latitude C. contusa morphotypes from the mid-latitude South Atlantic Ocean. We suggest that this event was caused by a short period of surface-water warming in the southern mid-latitudes corresponding to the brief high-latitude warming event and associated faunal migrations in the Boreal and Austral realms. Dataset North Atlantic South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Austral ENVELOPE(-51.663300,2.985300,40.360800,-30.276500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
39-356 43-384 72-516F 74-525A 74-527 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg39 Leg43 Leg72 Leg74 North Atlantic/RIDGE South Atlantic South Atlantic/CONT RISE South Atlantic/CREST South Atlantic/PLATEAU |
spellingShingle |
39-356 43-384 72-516F 74-525A 74-527 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg39 Leg43 Leg72 Leg74 North Atlantic/RIDGE South Atlantic South Atlantic/CONT RISE South Atlantic/CREST South Atlantic/PLATEAU Kucera, Michal Malmgren, Bjorn Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic |
topic_facet |
39-356 43-384 72-516F 74-525A 74-527 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg39 Leg43 Leg72 Leg74 North Atlantic/RIDGE South Atlantic South Atlantic/CONT RISE South Atlantic/CREST South Atlantic/PLATEAU |
description |
Spatial and temporal patterns in test size and shape (test conicity and spiral roundness) and absolute abundance (accumulation rate) of the planktonic foraminifer Contusotruncana contusa were studied in the South Atlantic Ocean (DSDP sites 356, 516, 525 and 527) during an interval corresponding to the last 800 kyr of the Cretaceous. The variation in absolute abundance of C. contusa was characterised by alternating periods of high and low abundance; some of these periods were traceable across the entire mid-latitude South Atlantic Ocean. While the mean spiral roundness did not show any interpretable patterns, a sudden increase of the mean test size and mean test conicity occurred between 65.3 and 65.2 Ma (based on linear interpolation within the Cretaceous part of Subchron C29R) at all sites studied, indicating a poleward migration followed by rapid withdrawal of the low-latitude C. contusa morphotypes from the mid-latitude South Atlantic Ocean. We suggest that this event was caused by a short period of surface-water warming in the southern mid-latitudes corresponding to the brief high-latitude warming event and associated faunal migrations in the Boreal and Austral realms. |
format |
Dataset |
author |
Kucera, Michal Malmgren, Bjorn |
author_facet |
Kucera, Michal Malmgren, Bjorn |
author_sort |
Kucera, Michal |
title |
Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic |
title_short |
Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic |
title_full |
Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic |
title_fullStr |
Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic |
title_full_unstemmed |
Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic |
title_sort |
contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude south atlantic |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.704985 https://doi.org/10.1594/PANGAEA.704985 |
op_coverage |
MEDIAN LATITUDE: -21.221178 * MEDIAN LONGITUDE: -21.656900 * SOUTH-BOUND LATITUDE: -30.276500 * WEST-BOUND LONGITUDE: -51.663300 * NORTH-BOUND LATITUDE: 40.360800 * EAST-BOUND LONGITUDE: 2.985300 * DATE/TIME START: 1974-11-16T00:00:00 * DATE/TIME END: 1980-06-28T00:00:00 |
long_lat |
ENVELOPE(-51.663300,2.985300,40.360800,-30.276500) |
geographic |
Austral |
geographic_facet |
Austral |
genre |
North Atlantic South Atlantic Ocean |
genre_facet |
North Atlantic South Atlantic Ocean |
op_source |
Supplement to: Kucera, Michal; Malmgren, Bjorn (1998): Terminal Cretaceous warming event in the mid-latitude South Atlantic Ocean: evidence from poleward migration of Contusotruncana contusa (planktonic foraminifera) morphotypes. Palaeogeography, Palaeoclimatology, Palaeoecology, 138(1-4), 1-15, https://doi.org/10.1016/S0031-0182(97)00124-7 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.704985 https://doi.org/10.1594/PANGAEA.704985 |
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.704985 https://doi.org/10.1016/S0031-0182(97)00124-7 |
_version_ |
1766133732712906752 |