Post-Laramide geology of the U.S. Cordilleran region

Cenozoic tectonic evolution of the central Wassuk Range, western Nevada, USA

“…These eruptions signaled a significant change in the tectonic setting of the central Wassuk Range. The timing of the eruption of these tuffs in the central Wassuk Range suggests that this volcanism was part of the initial southward sweep of intermediate to silicic volcanism from the Pacific Northwest (e.g., Stewart, 1980;Glazner and Bartley, 1984;Christiansen et al, 1992). This continental-scale event could be related to the hypothesized delamination of the Farallon slab from beneath North America, where the shallowly-dipping Farallon slab either "decomposed" due to conductive heating, detached and fell away into the mantle, or re-steepened in dip, allowing deeper mantle to upwell beneath the continent beginning at about 60 Ma in the Pacific Northwest (e.g., Severinghaus and Atwater, 1990).…”

“…Ma (Lipman, 1992;Fig. 1), with the cessation of this magmatism migrating northward in concert with the initiation of dextral motion along the San Andreas fault system (e.g., Christiansen et al, 1992).…”

Aeolian dust in Colorado Plateau soils: Nutrient inputs and recent change in source

“…Regional felsic sources outside the plateau include the Mojave, Sonoran, and Great Basin deserts, which are generally upwind from the study area (ref. 37; Fig. 1).…”

A molecular phylogeny of aquatic gastropods provides a new perspective on biogeographic history of the Snake River Region

“…Biotic distributions instead have been used to infer that the ancestral Snake River flowed through southeast Oregon to the California Pacific coast, via either the Klamath (Taylor, 1960(Taylor, , 1985 or Sacramento (Miller, 1965) Rivers (also see Wheeler and Cook, 1954). Although this hypothesis is well entrenched in the literature (Christiansen and Yeats, 1992;Malde, 1965Malde, , 1991Smith et al, 2000), its supporting biogeographic evidence has never been rigorously evaluated.…”