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West–East Cross-Section Through the Mist gas Field

Schematic west–east geologic cross-section of the Mist gas field in Oregon showing the gas reservoir and reservoir seals.

The Cowlitz Formation consists of the Clark and Wilson sandstone, which contains the gas, and the Cowlitz Shale, which acts as a seal above the hydrocarbon reservoir. A normal fault acts as a lateral seal. The crooked lines represent unconformities, which bound the Cowlitz Formation.

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Diagram modified by Rebecca Port (NPS) from the Oregon DOGAMI Oil and Gas Investigation 10 by Olmstead and Alger (1985, fig. 5), http://www.oregongeology.org/pubs/ogi/OGI-10.pdf

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Lewis and Clark National Historical Park, Code: LEWI

Lewis and Clark National Historical Park
Latitude: 46.2874488830566, Longitude: -124.065803527832

NPS.gov Collection

01/01/0001

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Wednesday, July 7, 2021 3:48:30 PM

Wednesday, July 7, 2021 3:48:30 PM

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