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Forming the Coast Range—Ranger Jen’s Oreo Demo

3 photos showing subduction using a sandwich cookie and a 3d diagram of the pacific northwest subduction zone

Jennifer Natoli was a seasonal ranger at Redwood National and State Parks in California. In her version of the Oreo® cookie demonstration, the creamy filling is the layers of sediment and basalt on the ocean floor. As the Juan de Fuca Plate (lower cookie) subducts beneath the North American Plate (upper cookie), the layers are scraped off the ocean floor and pile up as the Coast Range.

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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

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Public Can View

Monday, February 3, 2020 9:20:25 AM

Monday, February 3, 2020 9:20:25 AM

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