A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch ...
(1) The entrance of water into the soil or rocks by all natural processes, including the infiltration of precipitation or snowmelt, gravity flow of streams into the ...
Foskor Mine in Palaborwa Phosphate Rock South Africa . Scope of supply: A fully automated “Roboprep” laboratory that was designed to function largely unmanned 24 ...
Valley or stream erosion occurs with continued water flow along a linear feature. The erosion is both downward, deepening the valley, and headward, extending the ...
The American Field Guide site has been retired from pbs.org. Produced in 2001 by Oregon Public Broadcasting, American Field Guide was an early experiment in online ...
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News8000.com is La Crosse, Wisconsin's online source for breaking news, weather, sports, video, school closings, events and community information. News8000 is the ...
Glossary of Geologic Terms. This glossary of geologic terms is based on the glossary in Earth: An Introduction to Geologic Change, by S. Judson and S.M. Richardson
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Los Angeles County, 1916 Map, from California Mineral Production for 1919 (with County Maps), Bulletin No. 88, by Walter W. Bradley, California State Mining Bureau ...
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