Nederbragt, Alexandra J; Erlich, Robert N; Fouke, Bruce W; Ganssen, Gerald M (1998): Stable carbon and oxygen isotope record of Cretaceous planktonic foraminifera from DSDP (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.704919, Supplement to: Nederbragt, AJ et al. (1998): Palaeoecology of the biserial planktonic foraminifer Heterohelix moremani (Cushman) in the late Albian to middle Turonian Circum-North Atlantic. Palaeogeography, Palaeoclimatology, Palaeoecology, 144(1-2), 115-133, https://doi.org/10.1016/S0031-0182(98)00089-3
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Abstract:
The Cretaceous Heterohelix moremani (Cushman) was the only biserial planktonic foraminiferal species from its first appearance in the late Albian up to the Cenomanian/Turonian boundary. Within that time, it increased gradually in abundance relative to other planktonic foraminifera in five Circum-North Atlantic sections. It is generally rare in upper Albian sediments, common in most of the Cenomanian and very abundant in sediments representing the latest Cenomanian Oceanic Anoxic Event. Short-term variations on the overall abundance trend correlate with positive excursions in the bulk carbonate delta13C record. Maximum rain rates of H. moremani during OAE2 show that this species was an opportunist that did well in extreme conditions, but its overall distribution indicates that it is not necessarily a marker for very high palaeoproductivity environments. Stable oxygen and carbon isotope measurements on foraminiferal species indicate that H. moremani was a surface water dweller at least in part of its geographic range, but incorporated 13C out of equilibrium with ambient seawater. It is depleted in delta13C relative to other planktonic foraminifera, which is attributed to vital effects related to its opportunistic character.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 37.418100 * Median Longitude: -20.281100 * South-bound Latitude: 25.925500 * West-bound Longitude: -27.060700 * North-bound Latitude: 48.910700 * East-bound Longitude: -13.501500
Date/Time Start: 1970-10-20T00:00:00 * Date/Time End: 1981-07-16T00:00:00
Minimum ORDINAL NUMBER: 1 * Maximum ORDINAL NUMBER: 4
Event(s):
14-137 * Latitude: 25.925500 * Longitude: -27.060700 * Date/Time: 1970-10-20T00:00:00 * Elevation: -5361.0 m * Penetration: 401 m * Recovery: 69.1 m * Location: North Atlantic/HILL * Campaign: Leg14 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 127 m cored; 9 m drilled; 54.4 % recovery
80-551 * Latitude: 48.910700 * Longitude: -13.501500 * Date/Time: 1981-07-16T00:00:00 * Elevation: -3887.0 m * Penetration: 201 m * Recovery: 67.2 m * Location: North Atlantic/ESCARPMENT * Campaign: Leg80 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 98.5 m cored; 7 m drilled; 68.2 % recovery
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
58 data points