What is orogeny and epeirogeny?

Epeirogeny, in geology, broad regional upwarp of the cratonic (stable interior) portions of continents. In contrast to orogeny (q.v.), epeirogeny takes place over broad, nonlinear areas, is relatively slow, and results in only mild deformation.

What is meant by Epeirogenic movements?

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. Epeirogenic movements may divert rivers and create drainage divides by upwarping of the crust along axes.

Which movement is also called as Epeirogenic movement?

Vertical Movements (Epeirogenic movements): Vertical movements are mainly associated with the formation of continents and plateaus. They are also called as Epeirogenic movements. The broad central parts of continents are called cratons and are subject to epeirogeny.

What is orogenic process?

Orogenesis, the process of mountain building, occurs when two tectonic plates collide – either forcing material upwards to form mountain belts such as the Alps or Himalayas or causing one plate to be subducted below the other, resulting in volcanic mountain chains such as the Andes.

What is the meaning of the word epeirogeny?

ep·ei·rog·e·ny. movements of uplift or depression affecting large areas of the earth’s crust and producing continents, ocean basins, etc. Origin of epeirogeny.

Which is the best description of the epeirogenic movement?

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.

What are some of the effects of epeirogeny?

Phenomena accompanying epeirogeny include the development of regional disconformities that gently bevel underlying strata and the formation of regressive deposits if marine incursions have taken place. Igneous intrusion and regional metamorphism rarely, if ever, are associated with epeirogeny.

What are the causes of The epeirogeny of the Earth?

The causes of epeirogeny are not well known but may include large-scale adjustments of the continental crust to phase transitions in the Earth’s mantle. The epeirogenic portions of continents (i.e., those that have escaped orogenesis in the past 500 million years) experience denudation in…