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Continental Rift Block Diagram

block diagram of earth's surface layers at continental rift zone

National Park Service sites in continental rift zones reveal long mountain ranges separated by deep valleys (basins) that are partially filled with sedimentary and volcanic material. Earthquakes (white stars) occur when the fault lines separating the basins and ranges suddenly let go.

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Modified from “Beauty from the Beast: Plate Tectonics and the Landscapes of the Pacific Northwest,” by Robert J. Lillie, Wells Creek Publishers, 92 pp., 2015, www.amazon.com/dp/1512211893.

Public domain:Full Granting Rights

Image

Geologic Resources Division, Code: GRD

NPS.gov Collection

01/14/2020

Public Can View

Friday, January 31, 2020 10:16:03 AM

Friday, January 31, 2020 10:16:03 AM

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