GEOLOGICAL SURVEY

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About Geological Survey

A geological survey is the systematic investigation of the subsurface of a given piece of ground for the purpose of creating a geological map or model. A geological survey employs techniques from the traditional walk-over survey, studying outcrops and landforms, to intrusive methods, such as hand augering and machine driven boreholes, to the use of geophysical techniques and remote sensing methods, such as aerial photography and satellite imagery. Such surveys may be part of a broader, national survey effort to maintain the geological inventory and advance the knowledge of geosciences for the benefit of the nation.
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Geological Survey Video: California's 'Big One' Might Actually Be Several S

GEOLOGICAL SURVEY NEWS REPORT


Geological Survey news report

Geological Survey News

Geological Survey News