USGS - science for a changing world

USGS Geology in the Parks

Geologic story of the North Cascades button

North Cascades National Park: Forming depressions along faults

How horizontal movement on faults can produce depressions that fill with 	sediment.
Diagramatic map showing how horizontal movement on faults can produce depressions that fill with sediment.
One way to get extension or stretching of the crust while blocks of crust are sliding past each other along large faults is to have irregularities in the fault planes that open up gaps in the crust, or to have the faults discontinuous but arranged in an en echelon pattern.
| North Cascades National Park geology home | | North Cascades National Park | | Geologic & Field Trip Maps | | Geology field trip | | Site contents |

Material in this site has been adapted from a book, Geology of the North Cascades: A Mountain Mosaic by R. Tabor and R. Haugerud, of the USGS, with drawings by Anne Crowder. It is published by The Mountaineers, Seattle.

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://geomaps.wr.usgs.gov/parks/noca/sb11faultbasins.html
Page Contact Information: Webmaster
Page Last Modified: 13-Dec-2016@16:42