- journal_title：Journal of the Geological Society
- Contributor：A. Ando ; S. C. Woodard ; H. F. Evans ; K. Littler ; S. Herrmann ; K. G. Macleod ; S. Kim ; B.-K. Khim ; S. A. Robinson ; B. T. Huber
- Publisher：Geological Society of London
- Date：2013-05-01
- Format：text/html
- Language：en
- Identifier：10.1144/jgs2012-137
- journal_abbrev：Journal of the Geological Society
- issn：0016-7649
- volume：170
- issue：3
- firstpage：381
- section：Special
The Cretaceous deep-sea record of the Santonian–Campanian transition is commonly interrupted by an extensive unconformity (representing <10 Myr of hiatus). The resultant palaeoceanographic gap can now be partly bridged by a recent short core of pelagic ooze from Shatsky Rise (Integrated Ocean Drilling Program (IODP) Site U1348), with precise multidisciplinary age constraints developed herein. New oxygen isotope data from very well-preserved benthic foraminifera, together with accurately compiled comparable benthic data from previous Pacific deep-sea sections, exhibit a large (c. +1‰) early Campanian shift. We propose the Santonian–Campanian climatic transition was not gradual but was the first major cooling step after sustained mid-Cretaceous hothouse conditions.