Julio L. Betancourt – författare
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2 produkter
Requiem for the Santa Cruz
An Environmental History of an Arizona River
Av Robert H. Webb, Julio L. Betancourt m. fl.
Inbunden, 2014
900 kr
Tillfälligt slut
In prehistoric times, the Santa Cruz River in what is now southern Arizona saw many ebbs, flows, and floods. It flowed on the surface, meandered across the floodplain, and occasionally carved deep channels or arroyos into valley fill. Groundwater was never far from the surface, in places …
Packrat Middens
The Last 40,000 Years of Biotic Change
Av Julio L. Betancourt, Thomas R. Van Devender m. fl.
Häftad, 2016
509 kr
Tillfälligt slut
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 …
