The marine Eocene-Oligocene transition of 34 million years ago
was a critical turning point in Earth's climatic history, when the
warm, high-diversity "greenhouse" world of the early Eocene ceded
to the glacial, "icehouse" conditions of the early Oligocene. This
book surveys the advances in stratigraphic and paleontological
research and isotopic analysis made since 1989 in regard to marine
deposits around the world. In particular, it summarizes the
high-resolution details of the so-called doubthouse interval
(roughly 45 to 34 million years ago), which is critical to testing
climatic and evolutionary hypotheses about the Eocene
deterioration.
The authors' goals are to discuss the latest information
concerning climatic and oceanographic change associated with this
transition and to examine geographic and taxonomic patterns in
biotic turnover that provide clues about where, when, and how fast
these environmental changes happened. They address a range of
topics, including the tectonic and paleogeographic setting of the
Paleogene; specific issues related to the stratigraphy of shelf
deposits; advances in recognizing and correlating boundary
sections; trends in the expression of climate change; and patterns
of faunal and floral turnover. In the process, they produce a
valuable synthesis of patterns of change by latitude and
environment.
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