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Full-Text Articles in Physical Sciences and Mathematics
Stratigraphy, Geochronology, And Tectonics Of The Salt Lake Formation (Tertiary) Of Southern Cache Valley, Utah, Kristine A. Smith
Stratigraphy, Geochronology, And Tectonics Of The Salt Lake Formation (Tertiary) Of Southern Cache Valley, Utah, Kristine A. Smith
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study synthesizes the deposition and tectonic evolution of the Tertiary deposits in southern Cache Valley, a narrow, north-trending valley in the northeastern Basin-and- Range Province. The surrounding mountains consist of Proterozoic and Paleozoic sedimentary rocks. Southern Cache Valley is an east-tilted half-graben. The oldest Tertiary sediments are on the west side of the basin, and the overall dip is to the east.
The Late Miocene to Early Pliocene Salt Lake Formation (Tsl) accumulated above the thin (to absent) Early to Middle Eocene Wasatch Formation (Tw) and the newly identified Fowkes and Norwood Tuff equivalents (Tfn; late Middle Eocene to …
Structure, Metamorphism, And Geochronology Along The Southern Margin Of The Breakenridge Orthogneiss, Coast Range, Southern British Columbia, John A. (John Andrew) Feltman
Structure, Metamorphism, And Geochronology Along The Southern Margin Of The Breakenridge Orthogneiss, Coast Range, Southern British Columbia, John A. (John Andrew) Feltman
WWU Graduate School Collection
The Breakenridge orthogneiss is located at the southern end of the Coast Plutonic Complex, in the southwest Canadian Cordillera. It consists of sheeted orthogneiss sills and metamorphosed country rock folded into a tight, upright antiform. The deformational and metamorphic history along the southern margin of this structure is the focus of this study.
The orthogneiss is in original intrusive contact with enveloping metavolcanic rocks of the Jura-Cretaceous Slollicum Schist. A new U-Pb zircon age of 103.8 ± 0.5 Ma, together with a published age of 96 Ma (Parrish and Monger, 1992), establishes an episode of igneous intrusion and crystallization between …