Episodic caldera volcanism in the Miocene southwestern Nevada volcanic field: Revised stratigraphic framework, 40Ar/39Ar geochronology, and implications for …

DA Sawyer, RJ Fleck, MA Lanphere… - Geological …, 1994 - pubs.geoscienceworld.org
Abstract The middle Miocene southwestern Nevada volcanic field (SWNVF) is a classic
example of a silicic multicaldera volcanic field in the Great Basin. More than six major …

Sequence, age, and source of silicic fallout tuffs in middle to late Miocene basins of the northern Basin and Range province

ME Perkins, FH Brown, WP Nash… - Geological …, 1998 - pubs.geoscienceworld.org
Abstract The latest Cenozoic (< 6 Ma) ash beds in the western United States have been
intensively studied for several decades. The more widespread of these ash beds are well …

Summary of hydrogeologic controls on ground-water flow at the Nevada Test Site, Nye County, Nevada

RJ Laczniak, JC Cole, DA Sawyer, DA Trudeau - 1996 - pubs.usgs.gov
The underground testing of nuclear devices has generated substantial volumes of
radioactive and other chemical contaminants below ground at the Nevada Test Site (NTS) …

Large‐scale crust formation and lithosphere modification beneath Middle to Late Cenozoic calderas and volcanic fields, western North America

CM Johnson - Journal of Geophysical Research: Solid Earth, 1991 - Wiley Online Library
Over 500,000 km3 of intermediate‐to silicic‐composition ash flow tuffs and lavas were
erupted from large‐volume volcanic fields in western North America during the middle to late …

Nd, Sr, and O isotopic variations in metaluminous ash-flow tuffs and related volcanic rocks at the Timber Mountain/Oasis Valley Caldera, Complex, SW Nevada …

GL Farmer, DE Broxton, RG Warren… - … to Mineralogy and …, 1991 - Springer
Nd, Sr and O isotopic data were obtained from silicic ash-flow tuffs and lavas at the Tertiary
age (16–9 Ma) Timber (Mountain/Oasis Valley volcanic center (TMOV) in southern Nevada …

The 40Ar/39Ar ages and tectonic setting of the middle Eocene northeast Nevada volcanic field

WE Brooks, CH Thorman… - Journal of Geophysical …, 1995 - Wiley Online Library
Widespread middle to late Eocene calc‐alkalic volcanism, which formed the Northeast
Nevada Volcanic Field, marks the earliest Tertiary volcanism in the northern Basin and …

Compositional variation in minerals of the chevkinite group

R Macdonald, HE Belkin - Mineralogical Magazine, 2002 - cambridge.org
The composition of chevkinite and perrierite, the most common members of the chevkinite
group, is closely expressed by the formula A4BC2D2Si4O22, where A=(La, Ce, Ca, Sr, Th) …

Digital geologic map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California

JL Slate, ME Berry, PD Rowley, CJ Fridrich, KS Morgan… - 2000 - osti.gov
This digital geologic map of the Nevada Test Site (NTS) and vicinity, as well as its
accompanying digital geophysical maps, are compiled at 1: 100,000 scale. The map area …

Composition, paragenesis, and alteration of the chevkinite group of minerals

R Macdonald, B Bagiński, HE Belkin… - American …, 2019 - degruyter.com
The chevkinite-group minerals (CGM) are dominantly monoclinic REE-Ti-Fe sorosilicates
[(REE, Ca) 4Fe2+ (Fe2+, Fe3+, Ti) 2Ti2 (Si2O7) 2O8)], with REE2O3 contents up to~ 50 …

A geophysical‐geological transect of the Silent Canyon caldera complex, Pahute Mesa, Nevada

JF Ferguson, AH Cogbill… - Journal of Geophysical …, 1994 - Wiley Online Library
Revision of lithological logs for boreholes penetrating the volcanic center at Pahute Mesa,
Nevada, has led to a thorough review of the volcanic stratigraphy and geologic structure. We …