Facpi Volcanics Member of Umatac Formation (GU*)
Facpi Formation (GU)
Miocene*
Eocene
Named from exposures at Facpi Point on the west side of Guam (Tracey and others, 1964).
not stated
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
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