Cenozoic volcanic rocks of coastal California were erupted west of the magmatic arc trend
related to subduction along the continental margin. Two assemblages, representing discrete …

Geophysical imaging of a tilted mantle plume extending at least 500 km beneath the
Yellowstone caldera provides compelling support for a plume origin of the entire …

Every large eruption of nonbasaltic magma taps a magma reservoir that is thermally and
compositionally zoned. Most small eruptions also tap parts of heterogeneous and evolving …

Plate motions relative to the hotspots over the past 4 to 7 Myr are investigated with a goal of
determining the shortest time interval over which reliable volcanic propagation rates and …

The superlative hot springs, geysers, and fumarole fields of Yellowstone National Park are
vivid reminders of a recent volcanic past. Volcanism on an immense scale largely shaped …

Inferring principal stress directions from geologic data, focal mechanisms, and in situ stress
measurements, we have prepared a map of principal horizontal stress orientations for the …

Low-angle—subduction segments beneath Peru and Chile are believed to represent
interaction of the subduction zone with the aseismic Nazca and Juan Fernandez Ridges. On …

Abstract Since 2.2 Ma, the Yellowstone Plateau volcanic field has produced∼ 6000 km3 of
rhyolite tuffs and lavas in> 60 separate eruptions, as well as∼ 100 km3 of tholeiitic basalt …

Pleistocene mammal ages, despite their limitations, among the best dated in the world.
External age control of Pliocene and Pleistocene faunas comes primarily from radioisotopic …

The Basin and Range province is a composite Cenozoic taphrogen with a present
configuration and internal geometry derived from superimposed multiple phases of …