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Continental area covered by relatively flat or gently tilted, mainly sedimentary strata
Geologic provinces of the world (USGS) Idealized cross-section of Earth's lithosphere, including the relationship between cratons, shields and platforms (Abbreviations: cb=cratonic basin, LIP=large igneous province, MOR=mid-ocean ridge)In geology, 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".[1] The post-Ordovician rocks of the South American Platform are examples of an orthoplatform.[2]
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