Geological Survey
noun
U.S. Government.
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.
(lowercase)
a systematic investigation of the geology of an area.
British Dictionary definitions for geological survey
Geological Survey
noun
a government-sponsored organization working in the field of geology, such as the US Geological Survey, the Geological Survey of India, or the Institute of Geological Sciences (UK)