DATA CENTER
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Photo Gallery for Clarke County, Virginia
Clarke
County
Photo Gallery
Age Dating |
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FILE: age02.jpg |
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DESCRIPTION: |
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Collection of age dating sample.
Air operated pump is to the left and water-quality field meter
is to the right. Nitrogen gas used to operate the pump
never contacts the sample water. The sample
water is isolated from the current atmosphere. Contact
with gases in the atmosphere at the time of sampling can cause
errors in the different age-dating methods. The
water-quality field meter measures water temperature, specific
conductance, dissolved oxygen, and pH of the spring water. |
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SOURCE:
David Nelms
USGS |
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