[PDF.97zi] Packrat Middens: The Last 40,000 Years of Biotic Change (Garland Studies in Entrepreneurship)

Packrat Middens: The Last 40,000 Years of Biotic Change (Garland Studies in Entrepreneurship)

[PDF.yv26] Packrat Middens: The Last 40,000 Years of Biotic Change (Garland Studies in Entrepreneurship)

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 | #3352161 in Books |  1990-06-01 | Original language:English | PDF # 1 |  10.50 x7.50 x1.50l,.0 | File type: PDF | 469 pages

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Over the past thirty years, late Quaternary environments in the arid interior of western North America have been revealed by a unique source of fossils: well-preserved fragments of plants and animals accumulated locally by packrats and quite often encased, amberlike, in large masses of crystallized urine. These packrat middens are ubiquitous in caves and rock crevices throughout the arid West, where they can lie preserved for tens of thousands of years. More than a...

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