Chapter

Putting Great Guania and the Isles of Yesteryear

James Lazell

in Island

Published by University of California Press

Published in print January 2005 | ISBN: 9780520243521
Published online March 2012 | e-ISBN: 9780520931596 | DOI: http://dx.doi.org/10.1525/california/9780520243521.003.0019
Putting Great Guania and the Isles of Yesteryear

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Heatwole and MacKenzie were describing a great island, occupying the entire area of what others call the Puerto Rico Bank today. No people ever saw the great island documented by Heatwole and MacKenzie. Geologists used to speak of “primary” time—the Paleozoic era, beginning some 600 million years ago and characterized by fossil fishes—and “secondary” time: the Mesozoic era dominated by amphibians and those huge reptiles called dinosaurs. The Holocene begins at the end of the Pleistocene, which is the end of the Wurm glacial maximum, but even that lacks a precise date because the ice began melting between 25,000 and 20,000 years ago. People were all over the Old World 25,000 years ago, tromping around ice-bound Europe, spearing wooly rhinos and wild cattle called aurochs, and painting their pictures on cave walls.

Keywords: Heatwole; MacKenzie; Puerto Rico; Mesozoic era; Pleistocene

Chapter.  32061 words.  Illustrated.

Subjects: Animal Pathology and Diseases

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