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Petrology And Structure Of The Cascade River Schist, In The Sibley Creek Area, Northern Cascades, Washington, Joe D. Dragovich

WWU Graduate School Collection

The focus of this study is on the protolith types, metamorphism and structure of the Cascade River Schist in the Sibley Creek area of the North Cascades, Washington. The two general lithologic packages are an arc and ocean floor unit termed the Cascade River and Napeequa units, respectively, by Tabor and others (in press). The Cascade River unit has a recognizable stratigraphy which is inverted and repeated across strike from the southwestern to northeastern sides of the field area, apparently as a result of macroscopic synclinal folding. The Napeequa unit lies on top of the Cascade River unit, in the …