South Fork Fault as a gravity slide: Its break-away, timing, and emplacement, northwestern Wyoming, U.S.A.: COMMENT 22 Jun 2013 | 01:05 am

South Fork Fault as a gravity slide: Its break-away, timing, and emplacement, northwestern Wyoming, U.S.A.: REPLY 22 Jun 2013 | 01:05 am

The Nathrop Domes, Colorado: Geochemistry and petrogenesis of a topaz rhyolite 22 Jun 2013 | 01:05 am

The four Nathrop Domes (~30 Ma) are located near Buena Vista, Colorado, within the Arkansas Valley Graben segment of the Rio Grande Rift. The domes are largely composed of sparsely to moderately porph...

U-Pb zircon age constraints on two episodes of Paleoproterozoic magmatism and development of the Grizzly Creek shear zone, White River Uplift, western... 22 Jun 2013 | 01:05 am

New U-Pb zircon ages from Precambrian exposures in the White River Uplift of western Colorado reveal at least two episodes of Proterozoic granitic magmatism and help to constrain the age of the 1-km-t...

Detrital zircon geochronology from Cenomanian-Coniacian strata in the Bighorn Basin, Wyoming, U.S.A.: Implications for stratigraphic correlation and p... 22 Jun 2013 | 01:05 am

A high-flux, Late Cretaceous magmatic event in the western United States has been tested as a zircon source for high-resolution chronostratigraphic correlation in coeval sedimentary rocks in northwest...

Evolution of fracture porosity and permeability during folding by cataclastic flow: Implications for syntectonic fluid flow 19 Dec 2012 | 12:20 am

The Canyon Range Syncline, central Utah, folded and continued to tighten by cataclastic flow, where fracture-bound blocks, defined by a distributed network of mesoscale (outcrop) fracture sets slid pa...

A late Eocene (Chadronian) mammalian fauna from the White River Formation in Kings Canyon, northern Colorado 19 Dec 2012 | 12:20 am

Several decades (1940s–2011) of prospecting and collecting of mammalian fossils from late Eocene strata of the White River Formation in Kings Canyon, a high-altitude (~2,500 m; 8,200 ft) paleovalley i...

Petrology of the Eureka Quartzite (Middle and Late Ordovician), Utah and Nevada, U.S.A. 19 Dec 2012 | 12:20 am

The Eureka Quartzite is a sheet-like quartzarenite up to 200-m thick that was deposited on the eastern shelf of the Cordilleran miogeocline from Canada to California. It is the only sandstone lithosom...