Foraminiferal oxygen and carbon isotope data for DSDP Sites 32-305 and 62-463 and ODP Sites 171-1049 and 171-1050, supplement to: Huber, Brian T; Norris, Richard D; MacLeod, Kenneth G (2002): Deep-sea paleotemperature record of extreme warmth during the Cretaceous. Geology, 30(2), 123-126


Oxygen isotope analyses of well-preserved foraminifera from Blake Nose (30°N paleolatitude, North Atlantic) and globally distributed deep-sea sites provide a long-term paleotemperature record for the late Albian-Maastrichtian interval that is difficult to reconcile with the existence of significant Cretaceous ice sheets. Given reasonable assumptions about the isotopic composition of Cretaceous seawater, our results suggest that middle bathyal water temperatures at Blake Nose increased from ~12°C in the late Albian through middle Cenomanian to a maximum of 20°C during the latest Cenomanian and earliest Turonian. Bottom waters were again ~12°C during the middle Campanian and cooled to a minimum of 9°C during the Maastrichtian. Correlative middle bathyal foraminifera from other ocean basins yield paleotemperature estimates that are very similar to those from Blake Nose. Comparison of global bottom-water temperatures and latitudinal thermal gradients suggests that global climate changed from a warm greenhouse state during the late Albian through late Cenomanian to a hot greenhouse phase during the latest Cenomanian through early Campanian, then to cool greenhouse conditions during the mid-Campanian through Maastrichtian.

Related Identifier<0123:DSPROE>2.0.CO
Related Identifier
Metadata Access
Creator Huber, Brian T; Norris, Richard D; MacLeod, Kenneth G
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2002
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Size 4 datasets
Discipline Earth System Research
Spatial Coverage (-76.112W, 21.350S, 157.850E, 32.002N); Blake Nose, North Atlantic Ocean; North Pacific/CONT RISE; North Pacific/SEAMOUNT
Temporal Coverage Begin 1973-08-29T00:00:00Z
Temporal Coverage End 1997-01-17T00:00:00Z