Platform (geology)

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.

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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 )