Platform (geology)

In geology, a platform is a continental area covered by relatively flat or gently tilted, mainly

metamorphic rocks of an earlier deformation. Platforms, shields and the basement rocks together constitute cratons.^[1] Platform sediments can be classified into the following groups: a "protoplatform" of metamorphosed sediments at the bottom, a "quasiplatform" of slightly deformed sediments, a "cataplatform", and an "orthoplatform" at the top. The Mesoproterozoic Jotnian sediments of the Baltic area are examples of a "quasiplatform".^[2] The post-Ordovician rocks of the South American Platform are examples of an orthoplatform.^[3]

References

^ Parker, Sybil P. (Ed.). 1997. McGraw-Hill Dictionary of Geology and Mineralogy. New York: McGraw-Hill.
doi:10.2205/2005ES000171
.

^ de Almeida, F. F. M.; et al. (1976). "The Upper Precambrian of South America". Boletim IG-USP. 7. Archived from the original on 2015-10-01. Retrieved 2015-09-29.

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[1] Parker, Sybil P. (Ed.). 1997. McGraw-Hill Dictionary of Geology and Mineralogy. New York: McGraw-Hill.

[Nago-2] :10.2205/2005ES000171
.

[BrazilOrtho-3] Almeida, F. F. M.; et al. (1976). "The Upper Precambrian of South America". Boletim IG-USP. 7. Archived from the original on 2015-10-01. Retrieved 2015-09-29.

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[2]

[3]

See also

References