Basin Great South

Anthracite is found most extensively in America, where it constitutes immauso deposits. Lx England, it is chiefly worked in the South Wales coal-field, although it may be met with in large quantities in other basins. The total area of this description of fuel in Great Britain and Ireland is about threo thousand seven hundred and twenty acres. 

Precipitation has not been extensively investigated as an input pathway for toxaphene to the Great lakes. An early report (W. Swain cited in Rice and Evans [4]) stated that samples collected near Lake Huron in 1980-1981 had toxaphene concentrations ranging from 7-108 ngL-1. Rice and Evans [4] reported a concentration of 9 ng L-1 in a composite sample from the southeastern shore of Lake Michigan for the same period. A Great Lakes atmospheric deposition workshop proposed a basin-wide consensus concentration of 0.2ngL-1 for the period 1989-1991 based on measurements in northwestern Ontario [69]. Elsewhere, Harder et al. [70] detected toxaphene in South Car-... 

Annual rainfall in northern South America varies greatly, from less than 400 mm in northeast Brazil and the Caribbean coast of South America to more than 3000 mm in the upper watershed of the Rio Negro. Fig. 2.2 shows three centers of abundant rainfall in the Amazon basin. One is located in northwest Amazonia, with more than 3600 mm per year. Another region with abundant rainfall is... 

Winograd I. J. and Thordarson W. (1975) Hydrogeologic and hydrochemical framework, south-central Great Basin, Nevada-Cahfomia, with special reference to the Nevada Test Site. US Geol. Surv. Prof. Pap., 712-C. 

Winograd, I. J., and Pearson, F. J., Jr., 1976, Major carbon-14 anomaly in a regional carbonate aquifer—Possible evidence for mega-scale channeling, south-central Great Basin, Water Resources Res. 12 1125-1143. 

Winograd, I. J., and Szabo, B. J., 1988, Water-table decline in the south-central Great Basin during the Quaternary period—implications for toxic waste disposal, in Geologic and Hydro-logic Investigations of a Potential Nuclear Waste Disposal Site at Yucca Mountain, U.S. Geol. Surv. Bulletin 1790, pp. 147-152. 

Active faults also exist elsewhere in the United States, in the midwest and in South Carolina. The last sizeable earthquakes in these regions occurred more than a hundred years ago, and geologists assume that earthquakes will probably occur within the next hundred years. The Pacific Northwest and Alaska, sitting atop active tectonic environments, will certainly be shaken by earthquakes for millions of years to come. The Great Basin, the western Rocky Mountains, and the United States northeast are all considered tectonically active enough for earthquakes to be considered possible. 

Anthropogenic contamination reaches the ocean bottom in the northern part of the North Atlantic because of the deep convection of the North Atlantic Deep Water. Further south in the basin the contamination reaches to depths of 2000 m. The depth at which the profiles reach half their surface maximum is between 600 and 1000 m. Note that this depth is not greatly different from the value of 800 m estimated in Fig. 11.6 for the depth of ocean equilibrium required to accommodate about half of the fossil fuel released to the atmosphere. It has been shown with global circulation models that a present-day flux of 2.2 Pg y into the ocean is required to accommodate the inventory of GO2 indicated in Fig. 11.7 (Table 11.3). 

Wopfner, H., Callen, R. Harris, W.K. (1974) The lower Tertiary Formation of the south-western Great Artesian Basin. Journal of the Geological Society of Australia 21, 17-51. 

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