Thursday, October 21, 2010

Plateau Mountains

Plateau Mountains (Buttes)-formed by flat-topped rocks that are lifted high abouve Earth's crust by convergent continental. Result of erosion.

EXAMPLES:

Mitten Buttes-formed far from current plate boundaries, result of erosion.














Hopi Butte-formed far from current plate boundaries, result of erosion.

Fault-Block Mountains

Fault-Block Mountains-formed when faults/cracks in earth's crust forces rocks up and down. There are no folds but many fractures and blocks of rock.

EXAMPLES:

Franklin Mountains-not formed near any plate boundary, the result of tensional stress in the crust












Ruby Mountains-not formed near any plate boundaries, the result of tensional stress in the crust

Folded Mountains

Folded Mountains-formed when 2 plates collide, edges crumble and an accrodian shape takes form. There are many synclines and anticlines.

Zagros Mountains-formed near convergent plate boundary, result of compression (shortening/thickening of crust)














Flat Irons-formed far from any plate boundaries, result of compression (shortening/thickening of crust)


Domed Mountains

Domed Mountain-the result of a large amount of melted rock pushing up under Earth's crust. THere is little folding or faulting but many peaks and valleys.

EXAMPLES:

Torres del Paine-formed near a convergetn plate boundary, result of subduction








El Capitan-formed near a convergent plate boundary, result of subduction

Volcano

Volcanic Mountains-formed when molten rock erupts and piles on surface. The rock can pile up on either the land or the ocean. Volcanos can be the result of many things, however most commonly they result from hot spots or subduction zones. Volcanoes can be near or far from plate boundaries.

EXAMPLES:

Avacha-near a convergent plate boundary, result of subduction














Fernandina-near a divergent plate boundary, result of hot spot

















Mauna Loa-not near any plate boundaries, result of hot spot