Late Quaternary Zonation of Vegetation in the Eastern Grand Canyon

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Science  17 Sep 1982:
Vol. 217, Issue 4565, pp. 1142-1145
DOI: 10.1126/science.217.4565.1142


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.