Climate in Earth History Studies in Geophysics (1982) / Chapter Skim
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16 Tertiary Marine and Nonmarine Climatic Trends
16 Tertiary Marine and Nonmarine Climatic Trends
Pages 154-158
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From page 154... ...
PALEOCENE OF THE ATLANTIC BASIN The Paleogene of the Mississippi embayment of southeastern North America contains an extensive sequence of land floras. These flora were, for the most part, included by Berry (1916)
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From page 156... ...
In contrast, the Paleogene floras from the Mississippi embayment—a region that now has abundant precipitation distributed throughout die year—exhibit a trend from tropical moist to tropical dry climate. The temperature fluctuations indicated by our analysis of the North Atlantic marine record are difficult to quantify, but the latitudinal differences between the occurrences of tropicalsubtropical assemblages indicate fluctuations in mean annual temperature of at least 10-IS°C at high middle latitudes; these fluctuations were, thus, at least as great as modern seasonal fluctuations.
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From page 157... ...
SUMMAPY Paleotemperature trends interpreted from deep-sea marine organisms and from land floras are generally similar to one anotber, botb in the timing and direction of changes. Both groups of organisms indicate that a thermal maximum occurred in the early Eocene and that major fluctuanons in mean annual temperature ocourred during the Paleogene.
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From page 158... ...
. Summary comments on Neogene biostratigraphy, physical stratigraphy, and paleo-oceanography in the marginal northeastern Pacific Ocean, in initial Reports of the Deep Sea Drilling Project 19, U.S.
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