Class 6

orogenic forces are that forces which means block making .they make Block mountains.epeirogenic forces are that forces which are continent making they make continent.

the Pacific OceanThe Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. Its length is approximately 40,000 kilometers (24,900 miles).

Shield volcanoes are huge, gently sloping volcanoes built of very thin lava spreading out in all directions from a central vent. They have wide bases several miles in diameter with steeper middle slopes and a flatter summit.

Diastrophism covers movement of solid (plastic) crust material, as opposed to movement of molten material which is covered by volcanism.

Folding occurs when the Earth’s rock layers become folded.Faulting occurs when the Earth’s crust gets cracked forming a fault.

In geology, epeirogenic movement (from Greek epeiros, land, and genesis, birth) is upheavals or depressions of land exhibiting long wavelengths and little folding apart from broad undulations. The broad central parts of continents are called cratons, and are subject to epeirogeny.

Orogeny refers specifically to deformation imposed during mountain building. Although mountains form in a variety of ways, most geologists associate orogeny with continental-size mountain systems that develop along an entire continental margin as a result of the convergence and accretion of two or more tectonic plates.

Endogenic forces are the pressure within the earth, also known as internal forces. Such internal forces contribute to vertical and horizontal motions and lead to subsidence, land upliftment, volcanism, faulting, folding, earthquakes, etc.

Exogenic Forces These are external forces that operate and act on the surface of the Earth. These forces are also known as ‘constructive forces’ as they create relief features on the surface of the Earth.

These features move because of movement at plates at the plate boundaries. Mountain ranges, ocean trenches, volcanoes, and earthquakes occur in patterns. The movement of plates causes these features to occur. They occur in patterns because certain features are formed at he site of the three types of plate boundaries.