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Year Published: 2014

Heuristic economic assessment of the Afghanistan construction materials sector: cement and dimension stone production

Over the past decade, the U.S. Government has invested more than $106 billion for physical, societal, and governmental reconstruction assistance to Afghanistan (Special Inspector General for Afghanistan Reconstruction, 2012a). This funding, along with private investment, has stimulated a growing demand for particular industrial minerals and...

Mossotti, Victor G.
Heuristic economic assessment of the Afghanistan construction materials sector: cement and dimension stone production; 2014; OFR; 2014-1208; Mossotti, Victor G.

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Year Published: 2014

A compilation of K-Ar-ages for southern California

The purpose of this report is to make available a large body of conventional K-Ar ages for granitic, volcanic, and metamorphic rocks collected in southern California. Although one interpretive map is included, the report consists primarily of a systematic listing, without discussion or interpretation, of published and unpublished ages that may be...

Miller, Fred K.; Morton, Douglas M.; Morton, Janet L.; Miller, David M.
A compilation of K-Ar-ages for southern California; 2014; OFR; 2014-1195; Miller, Fred K.; Morton, Douglas M.; Morton, Janet L.; Miller, David M.

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Year Published: 2014

Digital database of microfossil localities in Alameda and Contra Costa Counties, California

The eastern San Francisco Bay region (Contra Costa and Alameda Counties, California) is a geologically complex area divided by faults into a suite of tectonic blocks. Each block contains a unique stratigraphic sequence of Tertiary sediments that in most blocks unconformably overlie Mesozoic sediments. Age and environmental interpretations based on...

McDougall, Kristin; Block, Debra L.
Digital database of microfossil localities in Alameda and Contra Costa Counties, California; 2014; SIR; 2014-5120; McDougall, Kristin; Block, Debra

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Year Published: 2014

High-resolution topography and geomorphology of select archeological sites in Glen Canyon National Recreation Area, Arizona

Along the Colorado River corridor between Glen Canyon Dam and Lees Ferry, Arizona, located some 25 km downstream from the dam, archaeological sites dating from 8,000 years before present through the modern era are located within and on top of fluvial and alluvial terraces of the prehistorically undammed river. These terraces are known to have...

Collins, Brian D.; Corbett, Skye C.; Sankey, Joel B.; Fairley, Helen C.
High-resolution topography and geomorphology of select archeological sites in Glen Canyon National Recreation Area, Arizona; 2014; SIR; 2014-5126; Collins, Brian D.; Corbett, Skye C.; Sankey, Joel B.; Fairley, Helen C.

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Year Published: 2014

Correlated patterns in hydrothermal plume distribution and apparent magmatic budget along 2500 km of the Southeast Indian Ridge

Multiple geological processes affect the distribution of hydrothermal venting along a mid-ocean ridge. Deciphering the role of a specific process is often frustrated by simultaneous changes in other influences. Here we take advantage of the almost constant spreading rate (65–71 mm/yr) along 2500 km of the Southeast Indian Ridge (SEIR)...

Baker, Edward; Christophe Hémond; Anne Briais; Marcia Maia; Scheirer, Daniel S.; Sharon L. Walker; Tingting Wang; Yongshun John Chen
Baker, E. T., C. Hémond, A. Briais, M. Maia, D. S. Scheirer, S. L. Walker, T. Wang, and Y. J. Chen (2014), Correlated patterns in hydrothermal plume distribution and apparent magmatic budget along 2500 km of the Southeast Indian Ridge, Geochem. Geophys. Geosyst., 15, 3198–3211.

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Year Published: 2014

Geologic framework of thermal springs, Black Canyon, Nevada and Arizona

Thermal springs in Black Canyon of the Colorado River, downstream of Hoover Dam, are important recreational, ecological, and scenic features of the Lake Mead National Recreation Area. This report presents the results from a U.S. Geological Survey study of the geologic framework of the springs. The study was conducted in cooperation with the...

Beard, L. Sue; Anderson, Zachary W.; Felger, Tracey J.; Seixas, Gustav B.
Geologic framework of thermal springs, Black Canyon, Nevada and Arizona; 2014; OFR; 2013-1267-B; Beard, L. Sue; Anderson, Zachary W.; Felger, Tracey J.; Seixas, Gustav B.

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Year Published: 2014

Preliminary geologic map of Black Canyon and surrounding region, Nevada and Arizona

Thermal springs in Black Canyon of the Colorado River, downstream of Hoover Dam, are important recreational, ecological, and scenic features of the Lake Mead National Recreation Area. This report presents the results from a U.S. Geological Survey study of the geologic framework of the springs. The study was conducted in cooperation with the...

Felger, Tracey J.; Beard, L. Sue; Anderson, Zachary W.; Fleck, Robert J.; Wooden, Joseph L.; Seixas, Gustav B.
Preliminary geologic map of Black Canyon and surrounding region, Nevada and Arizona; 2014; OFR; 2013-1267-A; Felger, Tracey J.; Beard, L. Sue; Anderson, Zachary W.; Fleck, Robert J.; Wooden, Joseph L.; Seixas, Gustav B.

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Year Published: 2014

Historical channel-planform change of the Little Colorado River near Winslow, Arizona

This study evaluates channel-planform adjustment on an alluvial reach of the Little Colorado River and documents the geomorphic evolution of the channel through an analysis of aerial photographs and orthophotographs for the period 1936–2010. The Little Colorado River has adjusted to the effects of an extreme flood in 1923 and a subsequent decline...

Block, Debra L.
Historical channel-planform change of the Little Colorado River near Winslow, Arizona; 2014; SIR; 2014-5112; Block, Debra

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Year Published: 2014

Preliminary geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington

This digital map database and the PDF derived from the database were created from the analog geologic map: Wells, R.E. (1981), “Geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington.” The geodatabase replicates the geologic mapping of the 1981 report with minor exceptions along water boundaries and also...

Wells, Ray E.; Sawlan, Michael G.
Preliminary geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington; 2014; OFR; 2014-1063; Wells, Ray E.; Sawlan, Michael G.

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Year Published: 2014

Comments on the Yule Marble Haines block: potential replacement, Tomb of the Unknown Soldier, Arlington National Cemetery

Marble for the Tomb of the Unknown Soldier at Arlington National Cemetery was cut from the Colorado Yule Marble Quarry in 1931. Although anecdotal reports suggest that cracks were noticed in the main section of the monument shortly after its installation at the Arlington National Cemetery in Arlington, Virginia, detailed documentation of the...

Mossotti, Victor G.
Comments on the Yule Marble Haines block: potential replacement, Tomb of the Unknown Soldier, Arlington National Cemetery; 2014; OFR; 2013-1182; Mossotti, Victor G.

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Year Published: 2014

Linking rapid magma reservoir assembly and eruption trigger mechanisms at evolved Yellowstone-type supervolcanoes

The geological record contains evidence of volcanic eruptions that were as much as two orders of magnitude larger than the most voluminous eruption experienced by modern civilizations, the A.D. 1815 Tambora (Indonesia) eruption. Perhaps nowhere on Earth are deposits of such supereruptions more prominent than in the Snake River Plain–...

Wotzlaw, J.F.; Bindeman, I.N.; Watts, Kathryn E.; Schmitt, A.K.; Caricchi, L.; Schaltegger, U.
Jörn-Frederik Wotzlaw, Ilya N. Bindeman, Kathryn E. Watts, Axel K. Schmitt, Luca Caricchi, and Urs Schaltegger. Linking rapid magma reservoir assembly and eruption trigger mechanisms at evolved Yellowstone-type supervolcanoes. Geology, September 2014, v. 42, p. 807-810.

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Year Published: 2014

A mechanistic modeling and data assimilation framework for Mojave Desert ecohydrology

This study demonstrates and addresses challenges in coupled ecohydrological modeling in deserts, which arise due to unique plant adaptations, marginal growing conditions, slow net primary production rates, and highly variable rainfall. We consider model uncertainty from both structural and parameter errors and present a mechanistic model for the...

Ng, Gene-Hua Crystal.; Bedford, David; Miller, David M.
Ng, G.-H. C., Bedford, D. R., & Miller, D. M. (2014, June). A mechanistic modeling and data assimilation framework for Mojave Desert ecohydrology. Water Resources Research. Wiley-Blackwell. https://doi.org/10.1002/2014wr015281