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Geophysical Log Sample

Geophysical log showing

  • Natural gamma (in black)
  • Spontaneous potential (blue)
  • Long, short normal resistivity (red, dotted)
  • Using this geophysical log, the top of the Sparta Sand was determined to be 231 feet below land surface at the Welcome Center.
Borehole geophysics is one of the tools hydrologists use
to determine the depth and thickness of aquifers.
USGS Representative taking samples Driller's at work
Union County Water
Conservation Board
Union County Conservation District Environmental Protection Agency


U.S. Department of the Interior, U.S. Geological Survey
URL: http://sundarlrk.er.usgs.gov/sparta_recovery/index.html
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Last Modified: Thursday, 10-Nov-2003 btj
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