World Library  
Flag as Inappropriate
Email this Article

Basement (geology)

Article Id: WHEBN0005417918
Reproduction Date:

Title: Basement (geology)  
Author: World Heritage Encyclopedia
Language: English
Subject: Geology of North America, Fatra-Tatra Area, Geology of Russia, Alps, Geology of Botswana
Publisher: World Heritage Encyclopedia

Basement (geology)

In geology, the terms basement and crystalline basement are used to define the rocks below a sedimentary platform or cover, or more generally any rock below sedimentary rocks or sedimentary basins that are metamorphic or igneous in origin. In the same way the sediments and/or sedimentary rocks on top of the basement can be called a "cover" or "sedimentary cover".


In a discussion of European geology, the basement generally refers to rocks older than the Variscan orogeny. On top of this older basement Permian evaporites and Mesozoic limestones were deposited. The evaporites formed a weak zone on which the harder (stronger) limestone cover was able to move over the hard basement, making the distinction between basement and cover even more pronounced.

In Andean geology the basement refers to the Proterozoic, Paleozoic and early Mesozoic (Triassic to Jurassic) rock units as the basement to the late Mesozoic and Cenozoic Andean sequences developed following the onset of subduction along the western margin of the South American Plate.[1]

When discussing the Trans-Mexican Volcanic Belt of Mexico the basement include Proterozoic, Paleozoic and Mesozoic age rocks for the Oaxaquia, the Mixteco and the Guerrero terranes respectively.[2]

The term basement is used mostly in disciplines of geology like basin geology, sedimentology and petroleum geology in which the (typically Precambrian) crystalline basement is not of interest as it rarely contains petroleum or natural gas.[3]

See also


  1. ^ Teresa Moreno, et al., The geology of Chile, Geological Society of London, 2007, Ch. 2 Metamorphic and Igneous Basement Complexes, p. 5, ISBN 978-1-86239-220-5
  2. ^ A. Gómez-Tuena, Ma.T. Orozco-Esquivel, and L. Ferrari Igneous petrogenesis of the Trans-Mexican Volcanic Belt, Ch 5, in Susana A. Alaniz-Álvarez and Angel F. Nieto-Samaniego, eds., Geology of México, Geological Society of America Special Paper 422, 2007, p.142 - 145 ISBN 978-0-8137-2422-5
  3. ^ Search and Discovery Article #40052 (adapted from: AAPG Explorer (November and December, 1999)Mapping Geologic Structure of Basement and Role of Basement in Hydrocarbon Entrapment,Gay, Parker (2002)
  • Parker, Sybil P. (Ed.). 1997. McGraw-Hill Dictionary of Geology and Mineralogy. New York: McGraw-Hill.
  • Bates, Robert L. and Julia A. Jackson (Eds.) 1994. Dictionary of Geological Terms. American Geological Institute. New York: Anchor Books, Doubleday Dell Publishing.
  • Ben A. Van Der Pluijm (Editor), 1996, Basement and Basins of Eastern North America, Special Paper Geological Society of America ISBN 978-0-8137-2308-2
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.