A belt of the earth’s crust involved in the formation of mountains.
- These collision zones are known as orogenic belts, and the mountains are referred to as orogens.
- The Delamerian Orogen is a compressional orogen developed by westward vergent folds and thrust faults.
- Several features of the mountain belt are atypical when compared with other Palaeozoic orogens such as the Appalachians, Caledonides and Variscides.
1920s: from Greek oros 'mountain' + -gen.
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