All three are classic Block Mountains (Horsts). The Sierra Nevada (USA) is a massive tilted block. The Vosges (France) and Black Forest (Germany) are twin block mountains separated by the Rhine Rift Valley. They form when the Earth’s crust faults, ...
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The Himalayan mountain range is a classic example of a Folded mountain. It was formed by the collision of the Indian Plate and the Eurasian Plate. The intense compressive forces caused the sedimentary rocks of the ancient Tethys Sea to ...
Among the options, the Rockies are the youngest mountain range. They are part of the “Young Fold Mountains” formed during the late Cretaceous to Tertiary periods. In contrast, the Urals and Appalachians are ancient ranges (Paleozoic era) that have been ...
Leopold Kober propounded the Geosyncline Theory of mountain building. He described “Geosynclines” as long, narrow, mobile zones of water that collect massive amounts of sediment. Kober argued that the contraction of the Earth’s crust causes the rigid masses (kratogens) on ...
The Radioactivity Theory of mountain building was propounded by John Joly in 1925. He suggested that the heat generated by the decay of radioactive elements (like Uranium and Thorium) within the Earth’s crust causes the periodic melting and expansion of ...