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Humphris rock sample (without labels added in the magazine).

Humphris rock sample (without labels added in the magazine).
Humphris rock sample (without labels added in the magazine).
Humphris rock sample (without labels added in the magazine).
Humphris rock sample (without labels added in the magazine).
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Humphris rock sample (without labels added in the magazine).
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01/01/1998
Humphris rock 1.jpg
Date is approximate.
Caption from Oceanus magazine, Vol. 41, No. 2, Pg. 18:
A rock sample, recovered by drilling 116 meters below the active seafloor hydrothermal vent site
at 26°N on the Mid-Atlantic Ridge, shows how the rock has been altered by reactions with seawater at temperatures of about 300°C. Pieces of highly altered rock (gray) are cemented together with minerals such as iron sulfides (gold-colored) and quartz (white).
Courtesy of Susan Humphris
© Woods Hole Oceanographic Institution
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