What is Exogenetic force? What is the importance of exogenetic force? Geo Thinking //

EXOGENETIC FORCE

The exogenetic forces or processes also called as denudational processes or destruction forces or processes are originated from the atmosphere. These forces are continuously engaged in the the destruction of the relief features created by the endogenetic forces through there weathering erosional and depositional activities. Exogenetic processes are, therefore, planation processes. Denudation includes both weathering and erosion where weathering being a static process includes the disintegration and decomposition of rocks in situ whereas erosion is dynamic process which includes both removal of materials and their transportation to different destinations. Weathering is basically of three types viz. (a) Physical or mechanical weathering, (b) Chemical weathering and (c) Biological weathering. Weathering is very important for the biospheric ecosystem because weathering of parent rocks results in the formation of soils which are very essential for the sustenance of the biotic lives in the biosphere. The Erosional processes include running water or river, groundwater, sea waves, glaciers, periglacial processes and wind. The Erosional processes erode the rocks, trsnsport the eroded materials and deposit them in suitable places and thus form several types of Erosional and depositional landforms of different magnitudes and dimensions.

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What is fault? What are different types of faults ?? Geo thinking

Fault : When the The Crustal rocks are displaced due to tensional moment caused by endogenetic forces along a plane the resultant structure is called a fault. Components of a fault : Components of a fault are given below, 1. Fault Plane is that plane along which the rock blocks are displaced by tensions and compressional forces acting vertically and horizontally to form a fault. 2. Fault dip is the angle between the fault plane and horizontal plane.. 3. Upthrown Side represents the uppermost block of a fault. 4. Downthrown side represent the lower most block of a fault. 5. Hanging wall represents the upper wall of a fault. 6. Foot wall represents the lower wall of a fault. 7. Fault scarp is the steep wall-like slope caused by faulting of the crustal rocks. Types of faults : 1. Normal faults are formed due to the displacement of both the rocks blocks in opposite directions due to fracture consequent upon greatest stress. 2. Reverse faults are ...

What is Plate Tectonic? Types of plate tectonics // Plate Margins or boundaries.

Plate tectonics : The earth's crust is made up of several rigid and a solid plates. The term plate was first used by J. Tuzo Wilson, a Canadian geophysicist in 1965. Plate tectonic means the moment of plates. Classification of plates : Plates can be classified into two groups, these are- 1. Major plates : a. Indian Plate, b. Pacific plate, c. American plate, d. African plate, e. Eurasian plate, f. Antarctica plate. 2. Minor plates : a, Arabian plate, b. Philippines plate, c. Cocos plate, d. Caribbean plate, e. Nazca plate, f. Scotia plate, g. Carolina plate, h. Juan de puca plate, I. Bismarck plate. Plate Margins : Plate margins or boundaries are most significant because all tectonic activity occur along the plate margins. Plate margins or boundaries are classified into three categories. These are- 1. Constructive or divergent plate boundary : divergent plate boundary in plate tectonic is a linear feature that exist between two plates that are moving away ...

Interior structure of the Earth // Crust, mantle and Core of the earth

Interior structure of the Earth : 1. The Crust :- The crust is the outermost layer of the earth. The thickness of the crust is varies under oceanic and continental areas. The thickness of the oceanic crust is around 5 km, where as the thickness of the continental crust is around 30 km. It should be note here that the crust is thicker under mountainous areas. It is around 70 km thicker under the Himalayan region. The average density of the outer and lower crust is 2.8 and 3.0 respectively. The difference of density between the upper and lower crust is because of the pressure of supperincumbent load. The average velocity of P waves in the upper crust is 6.1 km per second while it becomes 6.9 km per second in the lower crust. 2. The mantle :- The portion of the interior bey...

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