Our Earth is continuously undergoing changes within its core, mantle and crust. Thus making number of Earth movements; some of them being slow and some appear on Earth crust to be abrupt but all of them have cause very slow and mostly result in change in the relief features on the crust.
This post is on diastrophic forces a type of slow endogenous forces.
They are of two types depending on their effect ;
1. Epeirogenetic Forces(epeiro=continent; genetic=origin): the forces which give rise to mountains, plateaus,etc. The effects are noticed on the uppermost layer.
i)The Forces may cause upliftment or subsidence of continental masses; either whole of it or a part of it or it may be upliftment of sea coast.eg . formation of Himalayas, West coast of North and South America.as shown;
.jpg)
ii)The Forces may also cause downward movement of the crustal mass; either subsidence of land area or submergence of coastal area.eg.drowned river valleys or rias or ofglaciated valleys or fjords.
.jpg)
This post is on diastrophic forces a type of slow endogenous forces.
They are of two types depending on their effect ;
1. Epeirogenetic Forces(epeiro=continent; genetic=origin): the forces which give rise to mountains, plateaus,etc. The effects are noticed on the uppermost layer.
.jpg) |
| Grand Canyon |
ii)The Forces may also cause downward movement of the crustal mass; either subsidence of land area or submergence of coastal area.eg.drowned river valleys or rias or ofglaciated valleys or fjords.
.jpg)
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