Compare earth movement and diastrophic force?
Answers
Our earth is undergoing deformations imperceptibly but inexorably.
These deformations are caused by the movements generated by various factors which are not completely understood and include the following:
1. The heat generated by the radioactive elements in earth’s interior.
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2. Movement of the crustal plates due to tectogenesis.
3. Forces generated by rotation of the earth.
4. Climatic factors
5. Isostacy—according to this concepts, blocks of the earth’s crust, because of variations in density would rise to different levels and appear on the surface as mountains, plateaux, plains or ocean basins (See box for details).
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Classification of Earth Movements:
Endogenetic Movements:The interaction of matter and temperature generates these forces or movements inside the earth’s crust. The earth movements are mainly of two types: diastrophism and the sudden movements.
1. Diastrophism:ADVERTISEMENTS:
It is the general term applied to slow bending, folding, warping and fracturing.
Such forces may be further divided as follows:
(i) Epeirogenic or continent forming movements act along the radius of the earth; therefore, they are also called radial movements. Their direction may be towards (subsidence) or away (uplift) from the centre. The results of such movements may be clearly defined in the relief.
Raised beaches, elevated wave-cut terraces, sea caves and fossiliferous beds above sea level are evidences of uplift. One of the reasons for believing that the Deccan was uplifted is that the nummulitic limestones rest uncomfortably on the basaltic lavas near Surat well above sea level.
Raised beaches, some of them elevated as much as 15 m to 30 m above the present sea level, occur at several places along the Kathiawar, Orissa, Nellore, Madras, Madurai and Thirunelveli coasts. Several places which were on the sea some centuries ago are now a few miles inland. For example, Coringa near the mouth of the Godavari, Kaveripattinam in the Kaveri delta and Korkai on the coast of Thirunelveli, were all flourishing sea ports about 1,000 to 2,000 years ago.
The Diastropic Force
The heavy movement of tectonic plates that result in the formation of Ocean basins, rift valleys, faults and continents is known as Diastrophism. Diastrophism is also known as the deformation of Earth's crust. Diastropic force is the force that is responsible for Diastrophism
Earth Movement.
Earth Movement refers to the revolution of the Earth around the sun that results in the changing seasons, day and night, eclipses and more.
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