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Introduction to Mass movement and its types.

Mass movement is defined as the movement of Earth material by the force of gravity. In other words, it is the detachment of rock materials and their down-slope transportation. According to R.J Chorley: ”Mass movement is the detachment and downslope transport of soil and rock material under the influence of gravity. The sliding and flowing …

Fluvial cycle of erosion

The word fluvial means running water and has been derived from the Latin word ”Fluvus” meaning river. Thus the fluvial cycle of erosion involves the degradation caused by running water in the shape of rivers, streams, and springs. Rivers are responsible for erosion and transportation simultaneously. They act through mechanical corrosion (Mechanical grinding of the …

Difference between weathering and erosion

(1). Weathering: Weathering is the chemical alteration and physical disintegration of Earth materials by the action of air, water and organisms. In other words, it is the breakdown of the rocks and their disintegration and decomposition without their movement from their original position to another area. Weathering is only the disintegration of the rocks particles …

Erosion

Erosion may be defined as the wearing down of Earth’s surface through weathering and the transportation of the particles to distant places. For example, the boulder is first loosened in a mass movement and then its pieces are carried by the stream. Similarly, moving angular pieces of rocks produce etching which cuts the surface of …

Weathering and its types

Weathering: Weathering is defined as the physical disintegration and chemical alteration of Earth materials by the action of water, air, and organisms. For example, the breakdown of rocks in situ, their disintegration and decomposition without distant transportation of the products. The process of creation of new relief features and wear and tear of Earth materials …

Changes brought about by the earthquakes?

The earthquakes cause major changes in the crust and on the surface of the Earth. Important changes are as given below: (1). Expansion of Earth’s Crust (2). Contraction of Earth (3). Disturbance of drainage system (4). Mud Volcanoes (5). Cultural Landscape (6). Landsliding (7). Fire (8). Liquefaction, Subsidence, and Related Effects (9). Tsunamis (1). Expansion …

Causes of Earthquakes

An earthquake is a natural phenomenon, which has many causes behind it. Some of these are natural while others are man-made. Among these causes, the most important are as follow; (1). Tectonic Movement causes Earthquakes: Earth’s crust is divided into large segments (fragments) separated along ridges. These segments are called plates (Lithospheric Plates). The term …

Magnitude of Earthquakes

The intensity of an earthquake is assessed on the Rickter Scale, which was developed by geophysicist Charles Richter in 1935. This scale assigns a number to an earthquake based on the severity of the ground motion It ranges from 0 to 8+. It is logarithmic so that an earthquake with a magnitude 4 causes 10 …

What is an Earthquake?

An Earthquake may be defined as the shaking and trembling of the Earth’s surface caused by sudden releases of stress with the crust of Earth. Thus an earthquake releases the energy that has been gradually stored through the stress of increasing deformation of rocks. The released energy takes the form of seismic waves that radiate …

Volcanic Form

Volcanic Form The erupted volcano comes in different forms. These forms are given as under: (1). Ash Cone: These are also called Tuff Cones. When heated rapidly by lava, water flashes to steam and expands violently, fragmenting huge amounts of lava into plumes of very fine grains of ash. This ash falls around the volcanic vent, creating an ash …