Geolog'ical Sur'vey

1. U.S. Govt.a division of the Department of the Interior, created in 1879, that studies the nation's water and mineral resources, makes topographic surveys, and classifies and leases public lands.
2. (l.c.) a systematic investigation of the geology of an area.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

geologicgeologic time


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