#LANDFORMS PLAIN CLIP ART SERIES#

All the internal forces described above are called constructive movements. These forces are active deep inside the earth. Geologically these sudden forces are also termed as ‘constructive forces’ because they create relief features on the surface of the earth.įor the purpose of classification the sudden forces and the Diastrophic forces described above form two pasts of endogenic forces. Earthquakes and volcanic activities are described as sudden force. Earthquake causes formation of lakes, other fractures and creates faults on the surface of the earth. Earthquakes are also termed as sudden movements. (3) Sudden Forces : Volcanic activity is a sudden movement volcanic eruptions results in the formation of volcanic mountains, extensive plateaus and also plains. They act horizontally and vertically and produce reliefs such a mountains, plateaus, plains lakes and big faults. The above two force, namely orogenic and epeirogenc are together called diastrophic forces.

‘epeiros’ in Greek means ‘continent’ ‘genic’ or ‘gentic’ means ‘building’ thus the continent building actuaries occur on a very large scale Such movements are a result of faulting or cracks in the earth’s surface Blocks mountains, basins, rift valley are produced by there movements. These vertical movements are known as epeirogenic movements. (2) Uplift and submergence : Another set of forces operating inside the earth act along a radius from the earth’s centre to the surface and are characterized by large scaleupinit or subsidence of land area. The term ‘orogenic is derived from the break of the word meaning ‘mountain-building.’ These forces act at a tangent to the surface of the earth and are primarily involved in plate tectonics. The forces responsible for formation of Fold Mountains are called organic movements. Almost all the fold mountain ranges of the world have been formed this why. This compression causes folding of the rocks. This result in disturbance in the sedimentary rock deposit lying in between two or more plates the sedimentary rocks are compressed. The plates push, collide or slider past each other. The horizontal movements of there plates is very slow. There plates float on the semi molten asthenosphere. (1) Plate Tectonics : The lithosphere is broken into several small and big plates. A landform is a natural feature of earth surface.ĬAUSES OF LANDFORM DEVELOPMENT ON THE SURFACE OF THE EARTH This leads to several conditions which cause landform development on the surface of the earth.

The internal heat of the earth therefore melts the rock and keeps the asttenosphere which is underneath the crust in a semi molten state. The intense heat in the earth’s interior does not travel to the surface because rocks are bad conductors of heat.

#LANDFORMS PLAIN CLIP ART SERIES#

The earth is made up of a series of concentric rock layers namely crust, mantle and core.

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Landforms plain clip art