Siletzia is a massive formation of early to middle Eocene epoch marine basalts and interbedded sediments in the forearc of the Cascadia subduction zone...
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island arc is completely subducted. 55–50 Myr ago the accretion of the Siletzia and Pacific Rim terranes occurred. 55–50 Myr ago the conclusion of the...
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formation of Eocene volcanic deposits on the Oregon coast. Siletz terrane: Siletzia, a tectonic terrane that forms the geological basement under northwestern...
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that marks the northernmost exposure of the Crescent Terrane (part of Siletzia), where basalt of the Metchosin Igneous Complex (correlative with the Crescent...
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Laramide Orogeny ended around 48 million years ago, the accretion of the Siletzia terrane began in the Pacific Northwest. This began the volcanic activity...
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United States, are a sequence of basaltic pillow lavas that make up part of Siletzia. The basaltic pillow lavas originally came from submarine volcanoes that...
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Rock in Central Oregon and perhaps another flood basalt event known as Siletzia which underlies much of the Pacific Northwest coast with exposures in the...
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southern end of Vancouver Island. It is the northernmost expression of the Siletzia terrane and consists of three rock units, including a basaltic sequence...
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List of volcanoes in Canada Olympic–Wallowa Lineament Puget Sound faults Siletzia Volcanology of Canada This article incorporates public domain material...
36 KB (4,678 words) - 08:58, 14 July 2024
Third and last wave of plutons added to Sierra batholith. 51 Ma Eocene The Siletzia Plate collides with the Pacific Northwest, forming the coast of much of...
4 KB (99 words) - 19:00, 21 October 2023