Evidence for glacial control of rapid sea level changes in the Early Cretaceous

Author(s): Stoll, Heather M.; Schrag, Daniel P.
Author Affiliation(s): Primary:
Princeton University, Department of Geological and Geophysical Sciences, Princeton, NJ, United States
Volume Title: Science
Source: Science, 272(5269), p.1771-1774. Publisher: American Association for the Advancement of Science, Washington, DC, United States. ISSN: 0036-8075 CODEN: SCIEAS
Note: In English. 31 refs.; illus.
Summary: Lower Cretaceous bulk carbonate from deep sea sediments records sudden inputs of strontium resulting from the exposure of continental shelves. Strontium data from an interval spanning 7 million years in the Berriasian-Valanginian imply that global sea level fluctuated about 50 m over time scales of 200,000 to 500,000 years, which is in agreement with the Exxon sea level curve. Oxygen isotope measurements indicate that the growth of continental ice sheets caused these rapid sea level changes. If glaciation caused all the rapid sea level changes in the Cretaceous that are indicated by the Exxon curve, then an antarctic ice sheet may have existed despite overall climatic warmth. (Auth.)
Year of Publication: 1996
Research Program: DSDP Deep Sea Drilling Project
Key Words: 02 Geochemistry; 07 Marine Geology and Oceanography; 12 Stratigraphy, Historical Geology and Paleoecology; Alkaline earth metals; Ancient ice ages; Berriasian; Carbonate sediments; Cores; Cretaceous; Deep Sea Drilling Project; Deep-sea environment; Fluctuations; Geochemical indicators; Glacial environment; Global; Isotopes; Lower Cretaceous; Marine environment; Marine sediments; Mesozoic; Metals; O-18/O-16; Oxygen; Paleoclimatology; Paleogeography; Rates; Regression; Sea-level changes; Sediments; Stable isotopes; Strontium; Transgression; Valanginian
Record ID: 1996048288
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States

Similar Items