Field Trip write up - Sam Lovely Cle Elum Ellensburg Field...

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Sam Lovely Cle Elum Ellensburg Field trip Site 1 is the location of the Roslyn Formation (fig 1). Roslyn formation lies just north of Red Bridge Road just after the road crosses the Teaneway River. The Roslyn Formation is the youngest observed in the Ellensburg formation, about 45 million years old. The sediment source for the Roslyn Formation is the Idaho Batholith transported southward by a high energy river. Site 2 is the Kellie Formation. The Kellie is around 18 million years old and lies just south east of Roslyn. The Kellie and Roslyn lie directly next to one another allowing for the observation of a large hiatus hiatus between these two formations. The Kellie Formation contains several different bed layers. The bottom bed layer is made up of fine grain sandstone with Rhyolite, the middle layer is made up of a very thick brown course sandstone layer. The middle layer is most likely the result of a hot Lehar flow from the Cascades. The top layer is made up of large conglomerate (approax. 12 cm in diameter) likely deposited by a very high energy river.
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This note was uploaded on 11/05/2009 for the course HSTAA 401 taught by Professor Conway during the Spring '09 term at University of Washington.

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Field Trip write up - Sam Lovely Cle Elum Ellensburg Field...

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