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Pages 205-208

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From page 205...
... Other more disturbed intervals, on the other hand, were open to major immigration episodes that coincided with positive isotopic excursions in the marine realm. Evidently f~rst-order changes in the oxygen isotope record are necessary but not sufficient causes of first-order immigration episodes into the North American land mammal fauna.
From page 206...
... (1984~. Blancan-Hemphillian land mammal ages and late Cenozoic mammal dispersal events, Annual Review Earth and Planetary Science 12, 445-488.
From page 207...
... (1981~. The Clarkforkian land mammal age and mammalian faunal composition across the Paleocene-Eocene boundary, University of Michigan Papers in Paleontology 26, 1-196.
From page 208...
... . On two kinds of rapid faunal turnover, in Catastrophes and Earth History: The New Uniformitarianism, W


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