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Science 17 September 1982:
Vol. 217. no. 4565, pp. 1142 - 1145
DOI: 10.1126/science.217.4565.1142
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Articles

Late Quaternary Zonation of Vegetation in the Eastern Grand Canyon

KENNETH COLE 1

1 Laboratory of Paleoenvironmental Studies, Department of Geosciences, University of Arizona, Tucson 85721

Fossil assemblages from 53 packrat middens indicate which plant species were dominant during the last 24,000 years in the eastern Grand Canyon. Past vegetational patterns show associations that cannot be attributed to simple elevational displacement of the modern zones. A model emphasizing a latitudinal shift of climatic values is proposed.

Submitted on December 28, 1981


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