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Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

Filter Total Items: 6152

Peritidal lithologies of Cambrian carbonate islands, Carrara Formation, southern Great Basin Peritidal lithologies of Cambrian carbonate islands, Carrara Formation, southern Great Basin

The Carrara Formation is a heterogeneous sequence of quartzites, siltstones, shales, limestones, dolostones, and mixed terrigenous-carbonate rocks. It is Early and Middle Cambrian in age (Stewart, 1970; Palmer, 1971). Figure 32-1 illustrates the general distribution of Carrara lithologies along a transect approximately normal to depositional strike (Fig. 32-2). The formation contains...
Authors
Robert B. Halley

Pollutants and toxins Pollutants and toxins

No abstract available at this time
Authors
B.F. Grant, C. Boyd

Production and management Production and management

No abstract available at this time
Authors
H. Dupree, J.W. Andrews, R. Reagan, R.O. Smitherman, D. Greenland

Some effects of pollutants in terrestrial ecosystems Some effects of pollutants in terrestrial ecosystems

Summary: Pollutants tend to simplify plant and animal communities by causing a progressive loss of species. At the extreme, this leads to erosion and loss of soil fertility. Weedy, broadly adapted species increase. Among animals, carnivorous species and groups are often the first to suffer. This is partly because of their exposure at the top of the food chain, and partly, it appears...
Authors
W. Stickel
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