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Sponge Gemmules from Lake Sediments in the Puget Lowland, Washington
Published online by Cambridge University Press: 20 January 2017
Abstract
Gemmules of five species of freshwater sponge found in deposits at Cedar Mountain bog in the southeastern Puget Lowland were used to infer that during the late-glacial period the water was calcareous, was not deficient in SiO2, was aerobic, and had a pH in the range 6.6–8.5. This is consistent with plant fossil data. In view of their paleoenvironmental potential it is worth looking for gemmules when extracting other fossils from lake sediments.
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- University of Washington
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