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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 …
Using Paleomagnetism To Unravel The Mysteries Of The Summit Creek Basalts, Glynis Bawden
Using Paleomagnetism To Unravel The Mysteries Of The Summit Creek Basalts, Glynis Bawden
Summer Research
The Summit Creek Basalts are a sequence of steeply dipping subaerial late Eocene basaltic flows located southeast of Washington’s Mount Rainier. Despite previous petrologic and paleomagnetic investigations, the origins of these basalts are poorly understood. It is uncertain whether they erupted in situ or were transported to their present location by tectonic processes. It is possible that these lavas were derived from the same magma source as a sequence of flows in the Crescent Formation on the Olympic Peninsula, as both erupted between 45 and 50 million years ago and have similar chemical compositions. A new paleomagnetic analysis of the …
Paleomagnetic Applications In Archaeology: Analysis Of Fire-Cracked Rocks At Camano Island Site, Tracy Anunsen
Paleomagnetic Applications In Archaeology: Analysis Of Fire-Cracked Rocks At Camano Island Site, Tracy Anunsen
Summer Research
Both archaeological and paleomagnetic data (specifically thermal remnant magnetization, or TRM) are being utilized in an effort to determine the temperature of heating for fire-cracked rocks (FCRs) found at a pre-contact site on Camano Island in Island County, WA. If temperatures were high enough to reach the Curie temperatures of any magnetic minerals contained within the rocks, the resulting information may permit inferences as to the fuels used and the purpose of the fires. The Camano Island site is thought to be a later pre-contact Kikiallus site, containing shell debris and human remains in addition to the FCRs. Samples show …