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11 votes

Origin of Andaman and Nicobar islands

The Andaman and Nicobar Islands are neither orogenic or volcanic in origin. They are in fact an accretionary wedge, i.e., an accretion of sediments and oceanic crust "scraped" from the ...
Jean-Marie Prival's user avatar
6 votes

Do divergent tectonic plates destroy mountains?

Quite the opposite. Divergent boundaries can cause mountain (well, actually volcano) building, because upwelling magma is part of the rifting process. First and most importantly, the Mid-Ocean Ridge ...
Spencer's user avatar
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5 votes
Accepted

Are the Olympic Mountains (in Washington state) geologically unique?

Short answer: yes, there are other mountains which contains oceanic crust in their lithologies. The process you described as "the upthrust of ocean crust" is called obduction. The resulting rock ...
Jean-Marie Prival's user avatar
5 votes

Do divergent tectonic plates destroy mountains?

I want to add some nice examples of how divergent plate movement can actually create mountains, not destroy them. Here are two photographs I took several years ago from the Red Sea rift near Eilat, ...
Gimelist's user avatar
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4 votes
Accepted

Formation of Mount Elbrus

It's a fairly dense analysis, but this paper seems to have your answer: Young Silicic Magmatism of the Greater Caucasus, Russia, with implication for its delamination origin based on zircon ...
jeffronicus's user avatar
  • 3,487
4 votes

Do divergent tectonic plates destroy mountains?

Do divergent tectonic plates destroy mountains? The short answer is "no". Erosion destroys mountains. Period. Not slumping, not faulting, not "flowing back to flatness" in the absence of compression, ...
Knob Scratcher's user avatar
4 votes

Do divergent tectonic plates destroy mountains?

Mountains tend to fault and collapse back to flatter ground once the building forces cease. This is a very slow process and rarely leads to the complete elimination of a mountain range. So, left on ...
John's user avatar
  • 6,966
2 votes

Are the cores of every mountain range igneous?

examples of mountain ranges with sedimentary or metamorphic cores Mount Everest. At an elevation of 7000 metres and higher, it is all sedimentary rock. Below 7000 metres, it is metamorphic of ...
Gimelist's user avatar
  • 23.2k
1 vote

Mountain formation and stress release?

When 2 plates collide, the orogeny accumulates stress. Once there is enough stress to fracture the rocks, an earthquake happens releasing the stress that has accumulated. That is what causes faults, ...
Mr.inquisitive's user avatar
1 vote

Are the cores of every mountain range igneous?

Orogeny (the building of mountains) is the result of converging plates, but the composition of the resulting mountain range will vary depending on tectonic setting: Subduction The subduction of an ...
Jean-Marie Prival's user avatar

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