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A rift valley is a graben. A German word. A graben geological structure in cross section looks like a V with a wide bottom, more like a U with sloped sides. The earth is pulled apart creating normal faults on either side and the center part sinks. The opposite structure, where the center rises is called a horst. Look up graben on wikipedia.

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13y ago
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13y ago

a diverggent plate boundary causes a rift valley

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9y ago

The Mid-Atlantic Ridge includes a deep rift valley that runs along the axis of the ridge along the North Atlantic Ridge and the South Atlantic Ridge by the Romanche Trench.

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Q: What type of fault created the Rio Grande Rift Valley?
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