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  1. ngmdb.usgs.gov › Info › standardsNational Geologic Map DatabaseStandards and guidelines - USGS

    5 days ago · GeMS is intended to provide a stepping stone toward development of multimap databases, in particular the National Geologic Map Database (NGMDB). Please visit our GeMS site. Related, Older Database Designs. This list focuses on the work by USGS and AASG staff, ca. 1998-2010, to define conceptual data models and physical implementations, mostly ...

  2. en.wikipedia.org › wiki › Geologic_time_scaleGeologic time scale - Wikipedia

    1 day ago · The discovery of isotopes in 1913 by Frederick Soddy, and the developments in mass spectrometry pioneered by Francis William Aston, Arthur Jeffrey Dempster, and Alfred O. C. Nier during the early to mid-20th century would finally allow for the accurate determination of radiometric ages, with Holmes publishing several revisions to his geological ...

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  4. www.britannica.com › biography › Eduard-SuessEduard Suess | Biography, Theory, & Facts | Britannica

    Apr 10, 2024 · Eduard Suess (born Aug. 20, 1831, London, Eng.—died April 26, 1914, Vienna, Austria) was an Austrian geologist who helped lay the basis for paleogeography and tectonics— i.e., the study of the architecture and evolution of the Earth’s outer rocky shell.

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  5. www.britannica.com › science › geologic-timeGeologic time | Periods, Time Scale, & Facts | Britannica

    Apr 5, 2024 · The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration— eons, eras, periods, epochs, and ages. The enumeration of those geologic time units is based on stratigraphy, which is the correlation and classification of rock strata.

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  7. researchguides.dartmouth.edu › physical_geographyPhysical Geography - Research Guides at Dartmouth College

    Apr 12, 2024 · Call Number: Baker-Berry GB 400.3 .E53 2004 v. 1 - 2. ISBN: 9780415272988. Geomorphology, the discipline which analyzes the history and nature of the earth's surface, deals with the landforms produced by erosion, weathering, deposition, transport and tectonic processes. In recent decades there have been major developments in the discipline and ...

  8. www.britannica.com › science › stratigraphy-geologyStratigraphy | Layers, Sediments & Fossils | Britannica

    Apr 5, 2024 · stratigraphy, scientific discipline concerned with the description of rock successions and their interpretation in terms of a general time scale. It provides a basis for historical geology, and its principles and methods have found application in such fields as petroleum geology and archaeology. Stratigraphic studies deal primarily with ...

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