United States Geological Survey YearbookU.S. Geological Survey, 1994 - Geology |
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Page 88
... Guayana Shield region of eastern Venezuela ( figs . 1A , B ) have resulted in deforestation , erosion , and release of the toxic metal mer- cury over a broad region . Severe mercury toxicity has been a recognized human health issue in ...
... Guayana Shield region of eastern Venezuela ( figs . 1A , B ) have resulted in deforestation , erosion , and release of the toxic metal mer- cury over a broad region . Severe mercury toxicity has been a recognized human health issue in ...
Page 89
... Guayana Shield Amazon River South America Area of Figure 1B 1000 Kilometers Figure 1A . Location of the Guayana Shield of the Amazonian craton , South America . ( Map by G.B. Sidder and V. Mendoza . ) Guayana ( CVG ) , under the ...
... Guayana Shield Amazon River South America Area of Figure 1B 1000 Kilometers Figure 1A . Location of the Guayana Shield of the Amazonian craton , South America . ( Map by G.B. Sidder and V. Mendoza . ) Guayana ( CVG ) , under the ...
Page 90
... Shield . ( Map by G.B. Sidder and V. Mendoza . ) Venezuelan part of the Guayana VENEZUELA 8 ° Orinoco River Ciudad ... GUYANA SURINAME FRENCH GUIANA BRAZIL Negro River Amapa Territory Amazon River 0 200 400 Kilometers For more ...
... Shield . ( Map by G.B. Sidder and V. Mendoza . ) Venezuelan part of the Guayana VENEZUELA 8 ° Orinoco River Ciudad ... GUYANA SURINAME FRENCH GUIANA BRAZIL Negro River Amapa Territory Amazon River 0 200 400 Kilometers For more ...
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