field trip write up redo

field trip write up redo - Cle Elum Ellensburg Field trip...

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Cle Elum Ellensburg Field trip Site 1, The Roslyn Formation (Fig . 1), lies just north of the Red Bridge Road at the crossing of the Teaneway River . Roslyn, is the youngest formation, about 45-55 million years old . The sediment source for the Roslyn is the Idaho Batholith transported southward by a high energy river which also deposited several over bank deposits during times of flooding or high water . Site 2, the Kellie Formation, is about 18 million years old and lies just south east of Roslyn allowing for the observation of a large hiatus between these two 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 . This layer is most likely the result of a hot Lehar flow from the Cascades giving this layer its distinct brown color . The top layer is made up of large conglomerate (approax . 12 cm in diameter) likely deposited by a very high energy river . There is a normal fault which uplifted half of
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field trip write up redo - Cle Elum Ellensburg Field trip...

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