Siletzia
Siletzia is a massive formation of early to middle Eocene epoch marine basalts and interbedded sediments in the forearc of the Cascadia subduction zone, on the west coast of North America. It forms the basement rock under western Oregon and Washington and the southern tip of Vancouver Island. It is now fragmented into the Siletz and Crescent terranes. Various theories have been proposed to account for the volume and diversity of Siletzian magmatism, as well as the approximately 75° of rotation, but the evidence is insufficient to determine Siletzia's origin; the question remains open.
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Blue Hills (Washington)
Leechtown, British Columbia
Loss Creek (Canada)
San Juan Valley (Vancouver Island)
Siletz River Volcanics
Yakima Fold Belt
Coast Range Volcanic ProvinceCoast Range basaltsCrescent TerraneCrescent terraneFarallon PlateGeologic timeline of Western North AmericaGeology of North AmericaGeology of the Pacific NorthwestLeech River FaultMetchosin Igneous ComplexPacific Coast RangesPuget Sound faultsSiletz (disambiguation)Siletz terraneTerraneVashon Glaciation
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Siletzia
Siletzia is a massive formation of early to middle Eocene epoch marine basalts and interbedded sediments in the forearc of the Cascadia subduction zone, on the west coast of North America. It forms the basement rock under western Oregon and Washington and the southern tip of Vancouver Island. It is now fragmented into the Siletz and Crescent terranes. Various theories have been proposed to account for the volume and diversity of Siletzian magmatism, as well as the approximately 75° of rotation, but the evidence is insufficient to determine Siletzia's origin; the question remains open.
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Siletzia is a massive formatio ...... much of western North America.
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Siletzia is a massive formatio ...... in; the question remains open.
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Siletzia
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