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Kucera, Michal; Malmgren, Bjorn (1998): Contusotruncana contusa abundances and morphotypes in the cretaceous mid-latitude South Atlantic [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.704985, Supplement to: Kucera, M; Malmgren, B (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

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Abstract:
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.
Project(s):
Deep Sea Drilling Project (DSDP)
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
Event(s):
39-356 * Latitude: -28.287000 * Longitude: -41.088000 * Date/Time: 1974-11-16T00:00:00 * Elevation: -3175.0 m * Penetration: 741 m * Recovery: 310.6 m * Location: South Atlantic/PLATEAU * Campaign: Leg39 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 42 cores; 396 m cored; 9.5 m drilled; 78.4 % recovery
43-384 * Latitude: 40.360800 * Longitude: -51.663300 * Date/Time: 1975-07-12T00:00:00 * Elevation: -3909.0 m * Penetration: 330.3 m * Recovery: 110.7 m * Location: North Atlantic/RIDGE * Campaign: Leg43 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 cores; 185 m cored; 9.3 m drilled; 59.8 % recovery
72-516F * Latitude: -30.276500 * Longitude: -35.285000 * Date/Time: 1980-03-11T00:00:00 * Elevation: -1313.0 m * Penetration: 1270.6 m * Recovery: 690.1 m * Location: South Atlantic/CONT RISE * Campaign: Leg72 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1092.5 m cored; 9 m drilled; 63.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
9 datasets

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Datasets listed in this publication series

  1. Kucera, M; Malmgren, B (1998): (Table 2) Absolute abundance of Contusotruncana contusa in DSDP Hole 39-356. https://doi.org/10.1594/PANGAEA.704953
  2. Kucera, M; Malmgren, B (1998): (Table 3) Contusotruncana contusa morphotypes in DSDP Hole 39-356. https://doi.org/10.1594/PANGAEA.704957
  3. Kucera, M; Malmgren, B (1998): (Table 3) Contusotruncana contusa morphotypes in DSDP Hole 43-384. https://doi.org/10.1594/PANGAEA.704958
  4. Kucera, M; Malmgren, B (1998): (Table 2) Absolute abundance of Contusotruncana contusa in DSDP Hole 72-516F. https://doi.org/10.1594/PANGAEA.704954
  5. Kucera, M; Malmgren, B (1998): (Table 3) Contusotruncana contusa morphotypes in DSDP Hole 72-516F. https://doi.org/10.1594/PANGAEA.704959
  6. Kucera, M; Malmgren, B (1998): (Table 2) Absolute abundance of Contusotruncana contusa in DSDP Hole 74-525A. https://doi.org/10.1594/PANGAEA.704955
  7. Kucera, M; Malmgren, B (1998): (Table 3) Contusotruncana contusa morphotypes in DSDP Hole 74-525A. https://doi.org/10.1594/PANGAEA.704960
  8. Kucera, M; Malmgren, B (1998): (Table 2) Absolute abundance of Contusotruncana contusa in DSDP Hole 74-527. https://doi.org/10.1594/PANGAEA.704956
  9. Kucera, M; Malmgren, B (1998): (Table 3) Contusotruncana contusa morphotypes in DSDP Hole 74-527. https://doi.org/10.1594/PANGAEA.704961