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.
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)


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  • Geological timescale

    noun 1. any division of geological time into chronological units, whether relative (with units in the correct temporal sequence) or absolute (with numerical ages attached)

  • Geologic-time

    noun 1. the succession of eras, periods, and epochs as considered in historical geology. geologic time (jē’ə-lŏj’ĭk) The period of time covering the formation and development of the Earth, from about 4.6 billion years ago to today.

  • Geologist

    [jee-ol-uh-jist] /dʒiˈɒl ə dʒɪst/ noun 1. a person who specializes in geologic research and study. n. 1795, from geology + -ist.

  • Geologize

    [jee-ol-uh-jahyz] /dʒiˈɒl əˌdʒaɪz/ verb (used without object), geologized, geologizing. 1. to study . verb (used with object), geologized, geologizing. 2. to examine . /dʒɪˈɒləˌdʒaɪz/ verb 1. to study the geological features of (an area)

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