STS-108 Earth Sciences and Image Analysis Debriefing with Crewmembers January 23, 2001

VOLCANOES AND MOUNTAIN BUILDING

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STS108-711-25

STS108-711-25         Click the photo number to access all resolutions available and the database record.

Morocco: SW Atlas Mts., Jbel Ouarkziz. The Anti-Atlas ranges, like the Pyrenees, were produced by two collisions between North Africa and Eurasia, one beginning about 320 million years ago and another about 80 million years ago. Beneath the massive sandstone and limestone beds were gypsum layers which flowed and slid when mountain-building pressures were applied, resulting in the broad, open folds seen in this excellent view. Tighter secondary folds developed due to crowding between major structures.

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