basin and range

« Back to Glossary Index

Term for the extensional tectonic province that extends from California’s Sierra Nevada Mountains in the west, to Utah’s Wasatch Mountains to the east, to southern Oregon and Idaho to the north, to northern Mexico to the south. Known as a wide rift, as each grabenbasin,’ bounded by horst ‘ranges.’ Each set of horsts with a graben has some individual extension, adding up to the overall rifting.