Orogeny

From Academic Kids

In geology, orogeny is the process of mountain building. The process of orogeny can take tens of millions of years and build mountains from plains or even the ocean floor. Orogeny can occur due to continential collisons or volcanic activity. Frequently, rock formations that undergo orogeny are severely deformed and undergo metamorphism. During orogeny, deeply buried rocks may be pushed to the surface. Sea bottom and near shore material may cover some or all of the orogenic area. If the orogeny is due to two continents colliding, the resulting mountains can be very high (see Himalaya).

Orogeny usually produces long linear structures, known as orogenic belts. Generally, orogenic belts consist of long parallel strips of rock exhibiting similar characteristics along the length of the belt. Orogenic belts are associated with subduction zones, which consume crust, produce volcanoes, and build island arcs. These island arcs may be added to a continent during an orogenic event.

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Taconic orogeny
Contents

List of orogenies

North American orogenies

European orogenies

Asian orogenies

South American orogenies

Antarctic orogenies

  • Napier orogeny (4000 200 Myr ago.)
  • Rayner orogeny (~ 3500 Myr ago.)
  • Humboldt orogeny (~ 3000 Myr ago.)
  • Insel orogeny (2650 150 Myr ago.)
  • Early Ruker orogeny (2000 - 1700 Myr ago.)
  • Late Ruker / Nimrod orogeny (1000 150 Myr ago.)
  • Beardmore orogeny (633 - 620 Myr ago.)
  • Ross Orogeny (~ 500 Myr ago.)

External links

pl:Orogeneza

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