DATA CENTER
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Photo Gallery for Clarke County, Virginia
Clarke
County
Photo Gallery
Age Dating |
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FILE: age05.jpg |
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DESCRIPTION: |
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Collection of sulfur hexafluoride
(SF6) age-dating sample. Sample water flows from the
spring into the bottom of the sample bottle without contacting
the atmosphere. The bottle is sealed with a cap with no
air bubbles present. The sample is analyzed by a gas
chromatograph with electron-capture detector at the
USGS Reston Chlorofluorocarbon Laboratory in Reston, Va.. |
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SOURCE:
David Nelms
USGS |
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