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Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Magnetic Exploration Of The Crescent Formation, Washington: The Search For A Hidden Fault Near Dusk Point, Samuel G. Furmanski
Magnetic Exploration Of The Crescent Formation, Washington: The Search For A Hidden Fault Near Dusk Point, Samuel G. Furmanski
Summer Research
The mafic rocks of the Olympic Peninsula, Washington, are part of an accreted terrane known as Siletzia which experienced transpressional stresses as far as 50 Ma ago in the early Eocene. The Peninsula has an accretion-thrust marine sedimentary interior and a mafic volcanic periphery juxtaposed along the Hurricane Ridge fault; a terrane-scale thrust fault. The mafic Crescent Formation (CF) can be subdivided into two units: The Lower Crescent member (LC) and the Upper Crescent member (UC) as defined by Tabor and Cady (1978). The LC consists of submarine basalt flows that have composition similar to mid-oceanic ridges with zircon fission-track …
Location And Classification Of The Olympia Structure, Olympic Peninsula, Wa, Jackie Perkins
Location And Classification Of The Olympia Structure, Olympic Peninsula, Wa, Jackie Perkins
Summer Research
This research determines that the northern continuation of the Olympia Structure underlies Vance Creek on the Olympic Peninsula. There is debate within the scientific community over whether this structure is a thrust fault or a fold, though this feature has not been widely researched or mapped in detail. Multiple magnetic and gravity surveys provide evidence of a large subsurface structure beneath the valley of Vance Creek, a region just south of a series of major thrust faults. These findings suggest the Olympia Structure is in fact a large thrust fault resulting from northeast-southwest compression.