![]() These belts are characteristically formed of (a) thick sequences of shallow water sandstones, limestones and shales deposited on continental crust and (b) deep-water trubidites and pelagic sediments, commonly with volcanoclastic sediments and volcanic rocks. In this book, the orogenic belts, also called mobile belts, are termed fold belts because they are made up of rocks that show large-scale folds, and faults/thrusts and metamorphism with evidence of melting or high mobility in the core region during orogenesis. Surely, mountain belts are also orogenic belts but not all orogenic belts are mountains. ![]() These terms are, however, not synonymous to Mountain belt which is a geographic term referring to areas of high and rugged topography. Oros means mountain and genic means birth) belts or orogens are some of the most prominent tectonic features of continents.
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