Virginia Water Science Center

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Photo Gallery for Clarke County, Virginia

 
Clarke Co. Photo GalleryClarke Co. Well Photo GalleryClarke Co. Age Dating Photo GalleryClarke Co. Field Methods Photo GalleryClarke Co. Geology Photo GalleryClarke Co. Geophysics Photo GalleryClarke Co. Panoramic Photo GalleryClarke Co. Springs Photo GalleryClarke Co. Streams Photo GalleryClarke Co. Wells Photo Gallery
 

Clarke County
Photo Gallery

Age Dating

   Clarke County photograph age06.jpg
FILE:  age06.jpg  
DESCRIPTION:  
Collection of dissolved gas sample.  Samples are analyzed with a gas chromatograph at the USGS Reston Chlorofluorocarbon Laboratory in Reston, Va..  The analyses includes dissolved nitrogen, argon, methane, carbon dioxide, and oxygen.  The temperature of the water at the time of recharge is determined by the concentrations of dissolved nitrogen and argon.  This recharge temperature is used in the age-dating techniques.  
   
   
   
SOURCE:
David Nelms
USGS		  
    Click for photograph age05.jpg Click for Field Methods Photo Gallery

Current Water Conditions for Clarke Co.

Shaded relief map of Clarke County, Va.The USGS provides current ("real-time") stream stage and streamflow, water-quality, and ground-water levels for 4 sites in Clarke County, Va.

Current Water Conditions for the Shenandoah Valley

Shaded relief map of the Shenandoah Valley of Virginia and West VirginiaThe USGS provides current ("real-time") stream stage and streamflow, water-quality, and ground-water levels for 35 sites in the Shenandoah Valley of Virginia and West Virginia.

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Page Last Modified: 28-Feb-2008 14:00:00 EST