A perfectly plastic material or Stain Venant material is the one where the stress cannot rise above the yield stress and strain can continue to accumulate without any change in the stress level. Rocks do not generally behave as perfectly Plastic during Plastic deformation. Strain rate is likely to have an effect, and stress level […]
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An unconformity is a plane of discontinuity that separates two rocks, which differs in age. The younger of these rocks are nearly always of sedimentary origin and must have been deposited on the surface of the older rock, which is a surface of erosion. Formation of unconformity : The formation of unconformity may be defined
An oceanic core complex or magnalium is a seabed geological feature that forms a long ridge perpendicular to a mid-oceanic ridge. It contains smooth domes that are lined with transverse ridge like a corrugated roof. They can vary in size from 10 to 150km in length, 5 to 15 km in width, and 500 to
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An ancient landform or landscape that had been buried beneath younger rocks or sediment and that is exposed by their subsequent erosion. This process is called Exhumation. Exhumation refers to any geological mechanisms that brings the rocks from deeper crustal levels to shallower crustal levels. While erosion or denudation is fundamental in eventually exposing these
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The rise of Himalaya has been related with the northward drift of the Indian Plate and it’s consequent collision with the Eurasian Plate. Paleomagnetic data from the floor of the India ocean suggests that the northward drift of the India Plate was most rapid during the Paleocene Epoch. This was also the time of the
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