Geology of Gable Mountain-Gable Butte Area
Gable Mountain and Gable Butte are two ridges which form the only extensive outcrops of the Columbia River Basalt Group in the central portion of the Pasco Basin. The Saddle Mountains Basalt and two interbedded sedimentary units of the Ellensburg Formation crop out on the ridges. These include, from oldest to youngest, the Asotin Member (oldest), Esquatzel Member, Selah Interbed, Pomona Member, Rattlesnake Ridge Interbed, and Elephant Mountain Member (youngest). A fluvial plain composed of sediments from the Ringold and Hanford (informal) formations surrounds these ridges. The structure of Gable Mountain and Gable Butte is dominated by an east-west-trending major fold and northwest-southeast-trending parasitic folds. Two faults associated with the uplift of these structures were mapped on Gable Mountain. The geomorphic expression of the Gable Mountain-Gable Butte area resulted from the comlex folding and subsequent scouring by post-basalt fluvial systems.
- Publication Date:
- OSTI Identifier:
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- Resource Type:
- Technical Report
- Research Org:
- Atomics International Div., Richland, WA (USA). Rockwell Hanford Operations
- Country of Publication:
- United States
- 58 GEOSCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; BASALT; GEOLOGY; COLUMBIA RIVER BASIN; GEOLOGIC FAULTS; RADIOACTIVE WASTE DISPOSAL; UNDERGROUND DISPOSAL; WASHINGTON; GEOLOGIC STRUCTURES; IGNEOUS ROCKS; MANAGEMENT; NORTH AMERICA; PACIFIC NORTHWEST REGION; ROCKS; USA; WASTE DISPOSAL; WASTE MANAGEMENT 580100* -- Geology & Hydrology-- (-1989); 052002 -- Nuclear Fuels-- Waste Disposal & Storage
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