write a note on the types of forces that are changing the earth crust ?
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Answers
forces, which affect the crust of the earth, are divided into two broad categories on the basis of their sources of origin. The forces are: 1. Endogenetic Forces 2. Exogenetic Forces.
Forces Affecting The Earth's Crust
1. Endogenetic Forces:
The forces coming from within the earth are called as endogenetic forces which cause two types of movements in the earth viz.:
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(I) Horizontal movements, and
(ii) Vertical movements.
These movements motored by the endogenetic forces introduce various types of vertical irregularities which give birth to numerous varieties of relief features on the earth’s surface (e.g., mountains, plateaux, plains, lakes, faults, folds etc.).
Volcanic eruptions and seismic events are also the expressions of endogenetic forces. Such movements are called sudden movements and the forces responsible for their origin are called sudden forces. We do not know precisely the mode of origin of the endogenetic forces and movement because these are related to the interior of the earth about which our scientific knowledge is still limited.
On an average the origin of endogenetic forces is related to thermal conditions of the interior of the earth. Generally, the endogenetic forces and related horizontal and vertical movements are caused due to contraction and expansion of rocks because of varying thermal conditions and temperature changes inside the earth.
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The displacement and readjustment of geomaterials sometimes take place so rapidly that earth movements are caused below the crust.
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Answer:
constructive and districtive forces
Explanation:
Crustal deformation refers to the changing earth's surface caused by tectonic forces that are accumulated in the crust and then cause earthquakes. ... The slow 'background' tectonic motions between the earth's plates, thereby constraining the buildup of stress on faults.