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Please help improve this article or section by expanding it. Further information might be found on the talk page or at requests for expansion. (December 2007) |
World geologic provinces (USGS)
Oceanic crust 0-20 Ma 20-65 Ma >65 Ma Geologic province Shield Platform Orogen Basin Large igneous province Extended crust
In geology, a platform is a continental area covered by relatively flat or gently tilted, mainly sedimentary strata, which overlie a basement of consolidated igneous or metamorphic rocks of an earlier deformation. Platforms, shields and the basement rocks together constitute cratons.
Parker, Sybil P. (Ed.). 1997. McGraw-Hill Dictionary of Geology and Mineralogy. New York: McGraw-Hill.
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