A tectonic phase or deformation phase is in structural geology and petrology a phase in which tectonic movement or metamorphism took place. Tectonic phases can be extensional or compressional in nature.
When numerous subsequent compressional tectonic phases share the same geodynamic cause (usually some plate tectonic mechanism) this is called an orogeny. During an orogeny tectonic phases lead to mountain building, which causes deformation and metamorphism of rocks. In most Phanerozoic orogenies many tectonic phases are distinguished.
Read more about Tectonic Phase: Tectonic Phases in Basin Geology and Sedimentary Rocks, Tectonic Phases in Metamorphic Rocks, See Also
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“The problem of the twentieth century is the problem of the color-linethe relation of the darker to the lighter races of men in Asia and Africa, in America and the islands of the sea. It was a phase of this problem that caused the Civil War.”
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