Moriya, Kazuyoshi; Wilson, Paul A; Friedrich, Oliver; Erbacher, Jochen; Kawahata, Hodaka (2007): Planktic and benthic foraminifreral isotope data for ODP Site 207-1258 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.723887, Supplement to: Moriya, K et al. (2007): Testing for ice sheets during the mid-Cretaceous greenhouse using glassy foraminiferal calcite from the mid-Cenomanian tropics on Demerara Rise. Geology, 35(7), 615-618, https://doi.org/10.1130/G23589A.1
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Abstract:
The mid-Cretaceous is widely considered the archetypal ice-free greenhouse interval in Earth history, with a thermal maximum around Cenomanian-Turonian boundary time (ca. 90 Ma). However, contemporaneous glaciations have been hypothesized based on sequence stratigraphic evidence for rapid sea-level oscillation and oxygen isotope excursions in records generated from carbonates of questionable preservation and/or of low resolution. We present new oxygen isotope records for the mid-Cenomanian Demerara Rise that are of much higher resolution than previously available, taken from both planktic and benthic foraminifers, and utilizing only extremely well preserved glassy foraminifers. Our records show no evidence of glaciation, calling into question the hypothesized ice sheets and rendering the origin of inferred rapid sea-level oscillations enigmatic. Simple mass-balance calculations demonstrate that this Cretaceous sea-level paradox is unlikely to be explained by hidden ice sheets existing below the limit of d18O detection.
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Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 9.433330 * Median Longitude: -54.733033 * South-bound Latitude: 9.433330 * West-bound Longitude: -54.733310 * North-bound Latitude: 9.433330 * East-bound Longitude: -54.732760
Date/Time Start: 2003-01-22T18:15:00 * Date/Time End: 2003-10-28T10:10:00
Event(s):
207-1258A * Latitude: 9.433330 * Longitude: -54.733310 * Date/Time Start: 2003-01-22T18:15:00 * Date/Time End: 2003-01-25T10:10:00 * Elevation: -3192.2 m * Penetration: 447.5 m * Recovery: 375.46 m * Location: South Atlantic Ocean * Campaign: Leg207 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 447.5 m cored; 0 m drilled; 83.9 % recovery
207-1258B * Latitude: 9.433330 * Longitude: -54.733030 * Date/Time Start: 2003-01-25T10:10:00 * Date/Time End: 2003-10-28T10:10:00 * Elevation: -3192.2 m * Penetration: 460.9 m * Recovery: 346.13 m * Location: South Atlantic Ocean * Campaign: Leg207 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 57 cores; 453.9 m cored; 7 m drilled; 76.3 % recovery
207-1258C * Latitude: 9.433330 * Longitude: -54.732760 * Date/Time Start: 2003-01-28T10:10:00 * Date/Time End: 2003-02-01T07:50:00 * Elevation: -3192.2 m * Penetration: 485 m * Recovery: 161.08 m * Location: South Atlantic Ocean * Campaign: Leg207 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 215.2 m cored; 269.8 m drilled; 74.9 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Moriya, K; Wilson, PA; Friedrich, O et al. (2007): (Table DR2) Planktic and benthic foraminifreral isotope data for ODP Hole 207-1258A. https://doi.org/10.1594/PANGAEA.723884
- Moriya, K; Wilson, PA; Friedrich, O et al. (2007): (Table DR2) Planktic and benthic foraminifreral isotope data for ODP Hole 207-1258B. https://doi.org/10.1594/PANGAEA.723885
- Moriya, K; Wilson, PA; Friedrich, O et al. (2007): (Table DR2) Planktic and benthic foraminifreral isotope data for ODP Hole 207-1258C. https://doi.org/10.1594/PANGAEA.723886