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The Rio Grande Rift

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Rio Grande Rift
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The mid-section of the continent is beginning to be pulled apart by extensional forces. Volcanism accompanies this activity. The upper Rio Grande River flows southward through New Mexico within a long fault-bounded basin, the Rio Grande Rift, where lava from a source deep in the mantle periodically spreads across the surface. In the near geologic future, several million years or so, a youthful ocean basin may occupy this area.

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U.S. Geological Survey
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Last Modification: 18 Oct 2000 (ebj)
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