Seymour Island-Marambio Drilling Project (SIMDP)

Cretaceous and Paleogene climate history, James Ross Basin, Antarctic Peninsula

James Ross Basin, east of the Antarctic Peninsula, contains the best high-latitude section in the world that spans more than 40 million years of geological history from the mid-Cretaceous to the mid-Cenozoic (~80-34Ma). More than 6000 m of marine and estuarine sediments were deposited during the filling of the James Ross back-arc basin. The sedimentary succession is extremely fossiliferous, yielding diverse invertebrate, vertebrate and plant fossil assemblages, allowing detailed reconstructions and integration of both terrestrial and marine systems. The sequence also contains a key global reference section for the Cretaceous-Tertiary extinction event at high latitudes.

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