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Mountain building (orogenesis) normally occurs at convergent plate boundaries where plates are moving towards each other. However at divergent boundaries there is a possibility for the formation of horst and graben structures where the tensile stresses cause down thrown blocks of crust to occur bordered by up thrown blocks of crust (horst) which may appear to be mountains.

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12y ago
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7y ago

Convergent boundaries between plates produce mountains by two different mechanisms:

  1. crumpling of similar plates (continental plate against continental plate e.g. Himalayan mountains, oceanic plate against oceanic plate e.g. Caribbean islands) forms folded mountains(usually nonvolcanic)
  2. subduction of oceanic plate under continental plate (e.g. Japanese islands, Aleutian islands, Cascade mountains, Andes mountains) forms volcanic mountains
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14y ago

The collision of slowly moving tectonic plates does create mountains, but so do other geological processes.

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14y ago

Good job! Mountains are formed by convergent boundaries, when two plates collide.

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Q: Are mountains created when two plates collide?
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