Grenville Orogen
Quick Summary
The Grenville orogeny was a significant geological event that occurred approximately 1.3 billion to 950 million years ago, primarily along the southeastern margin of the North American continent. This period marked a turning point in Earth's history, characterized by continental rifting and subsequent mountain-building.1
The Grenville orogenic belt is exposed mainly along the southeastern edge of the Canadian Shield, with smaller occurrences in the Appalachians, Mexico, and Greenland. This belt formed due to northwest-directed crustal-scale thrusting, which thickened the Earth's crust and created large mountain ranges. The process involved the collision of eastern North America with other continents, contributing to the amalgamation of the supercontinent Rodinia. The rocks within the Grenville belt, such as gneisses and granulites, were deeply buried and metamorphosed under high temperature and pressure before being uplifted to the surface.12
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