What is the geological origin of cuba?

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Offline petro_geo21

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What is the geological origin of cuba?
« on: 05/08/2010 19:18:07 »
I've been trying to get a clear picture of this for the longest time and so far it seems like there isn't any. Can anybody help me or at least point me in the right direction?

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Offline Ophiolite

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What is the geological origin of cuba?
« Reply #1 on: 06/08/2010 10:52:13 »
Here is my simplistic understanding based on a cursory examination of two links in a Bing search.

Cuba is the result of a suture between a Creataceous island arc and the Bahamas platform. As a consequence the island contains substantial amounts of limetsone, from the platform sedimentation; many volcanics, from the island arc; metamorphic elements, exhumed from subducted material and including - bless them - ophiolite sequences.

You may find these links of use:
http://www.mineralogie.ruhr-uni-bochum.de/eng/forschung/kuba.html

http://publish.uwo.ca/~wrchurch/cuba.htm

Observe; collate; conjecture; analyse; hypothesise; test; validate; theorise. Repeat until complete.

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Offline JimBob

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What is the geological origin of cuba?
« Reply #2 on: 06/08/2010 23:22:25 »
There are good descriptions - well one at least; and then mine - already posted for the island of Hispaniola. In general, the history is very, very similar. But being in a slightly different position, there are transform (strike- slip) faults in the eastern western part of Hispaniola where the island came in-line with Cuba.
 
http://www.thenakedscientists.com/forum/index.php?topic=16256.0.

As Ophiolite pointed out, there are ophiolitic sequences (former sea bed volcanic rocks) In Cuba as well as on the island of Hispaniola.  (ophiolitic sequences http://www.eos.ubc.ca/courses/eosc221/rock_cycle/ophiolite.html)

The Haitian earthquake of this year occurred along one of the transform faults that are a result of relative movement of Cuba with respect to Hispaniola.

 
« Last Edit: 07/08/2010 03:24:43 by JimBob »
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Offline petro_geo21

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What is the geological origin of cuba?
« Reply #3 on: 10/08/2010 18:21:01 »
Thanks a million guys!