basin-and-range crustal type

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A type of crust named after the type found in the basin-and-range province of the western United States. Extension has made the crust thin (average thickness 30 km) and highly unstable, resulting in a series of basins separated by upland areas, most of which are heavily eroded. There are strong negative gravity anomalies and marked volcanic and seismic activity.

Subjects: Earth Sciences and Geography.

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