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Year Published: 2016

Geologic and geophysical maps and volcanic history of the Kelton Pass SE and Monument Peak SW Quadrangles, Box Elder County, Utah

The Kelton Pass SE and Monument Peak SW 7.5' quadrangles are located in Box Elder County, northwestern Utah (figure 1; plate 1). The northern boundary of the map area is 8.5 miles (13.7 km) south of the Utah-Idaho border, and the southern boundary reaches the edge of mud flats at the north end of Great Salt Lake. Elevations range from 4218 feet (...

Felger, Tracey J.; Miller, David M.; Langenheim, Victoria; Fleck, Robert J.
Felger, T.J., Miller, D.M., Langenheim, V.E., Fleck, R.J., 2016, Geologic and geophysical maps and volcanic history of the Kelton Pass SE and Monument Peak SW quadrangles, Box Elder County, Utah: Utah Geological Survey Miscellaneous Publication 16-1DM, 2 sheets, scale 1:24,000, pamphlet 34 p., http://ugspub.nr.utah.gov/publications/misc_pubs/mp-16-1.pdf.

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Year Published: 2016

Regional and local correlations of feldspar geochemistry of the Peach Spring Tuff, Alvord Mountain, California

The chemical composition of feldspar grains in an ignimbrite from the Spanish Canyon Formation in the Alvord Mountain area, California, have been used to confirm similarities in three measured sections locally, and they are similar to exposures of the Peach Spring Tuff (PST) regionally. Feldspar grains were identified on the basis of texture (...

Buesch, David C.

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Year Published: 2016

Engagement with indigenous peoples and honoring traditional knowledge systems

The organizers of the 2014 US National Climate Assessment (NCA) made a concerted effort to reach out to and collaborate with Indigenous peoples, resulting in the most comprehensive information to date on climate change impacts to Indigenous peoples in a US national assessment. Yet, there is still much room for improvement in assessment processes...

Maldonado, Julie; Bennett, Bull; Chief, Karletta; Cochran, Patricia; Cozetto, Karen; Gough, Bob; Hiza-Redsteer, Margaret M.; Lynn, Kathy; Maynard, Nancy; Voggesser, Garrit

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Year Published: 2016

Two Holocene paleofire records from Peten, Guatemala: Implications for natural fire regime and prehispanic Maya land use

Although fire was arguably the primary tool used by the Maya to alter the landscape and extract resources, little attention has been paid to biomass burning in paleoenvironmental reconstructions from the Maya lowlands. Here we report two new well-dated, high-resolution records of biomass burning based on analysis of macroscopic fossil charcoal...

Anderson, Lysanna; Wahl, David B.

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Year Published: 2015

Reconnaissance stratigraphic studies in the Susitna basin, Alaska, during the 2014 field season

The Susitna basin is a poorly-understood Cenozoic successor basin immediately north of Cook Inlet in south-central Alaska (Kirschner, 1994). The basin is bounded by the Castle Mountain fault and Cook Inlet basin on the south, the Talkeetna Mountains on the east, the Alaska Range on the north, and the Alaska–Aleutian Range on the west (fig. 2-1)....

LePain, David L.; Stanley, Richard G.; Harun, Nina T.; Helmold, Kenneth P.; Tsigonis, Rebekah
LePain, D.L., Stanley, R.G., Harun, N.T., Helmold, K.P., and Tsigonis, R.M., 2015, Reconnaissance stratigraphic studies in the Susitna basin, Alaska, during the 2014 field season, in Gillis, R.J., Overview of 2014 energy-focused studies in Susitna basin, south-central Alaska, and preliminary results: Alaska Division of Geological and Geophysical Surveys Preliminary Interpretive Report 2015-3-2, p. 5-10. doi: 10.14509/29466 , http://dggs.alaska.gov/pubs/id/29466

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Year Published: 2015

Stratigraphic reconnaissance of the Middle Jurassic Red Glacier Formation, Tuxedni Group, at Red Glacier, Cook Inlet, Alaska

The Alaska Division of Geological & Geophysical Surveys (DGGS) and U.S. Geological Survey (USGS) are implementing ongoing programs to characterize the petroleum potential of Cook Inlet basin. Since 2009 this program has included work on the Mesozoic stratigraphy of lower Cook Inlet, including the Middle Jurassic Tuxedni Group between Tuxedni...

LePain, David L.; Stanley, Richard G.
LePain, D.L., and Stanley, R.G., 2015, Stratigraphic reconnaissance of the Middle Jurassic Red Glacier Formation, Tuxedni Group, at Red Glacier, Cook Inlet, Alaska, in Wartes, M.A., Energy-related studies during the 2014 field season, western Cook Inlet, Alaska: Alaska Division of Geological and Geophysical Surveys Preliminary Interpretive Report 2015-5-5, p. 23-28. doi:10.14509/29460, http://dggs.alaska.gov/pubs/id/29460

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Year Published: 2015

Geologic maps of the eastern Alaska Range, Alaska (1:63,360 scale)

This report provides a description of map units for a suite of 44 inch-to-mile (1:63,360-scale) geologic quadrangle maps of the eastern Alaska Range. This report also contains a geologic and tectonic summary and a comprehensive list of references pertaining to geologic mapping and specialized studies of the region. In addition to the geologic maps...

Nokleberg, Warren J.; Aleinikoff, John N.; Bond, Gerard C.; Ferrians, Oscar J.; Herzon, Paige L.; Lange, Ian M.; Miyaoka, Ronny T.; Richter, Donald H.; Schwab, Carl E.; Silva, Steven R.; Smith, Thomas E.; Zehner, Richard E.
Nokleberg, W.J., Aleinikoff, J.N., Bond, G.C., Ferrians, O.J., Jr., Lange, I.M., Miyaoka, R.T., Richter, D.H., Silva, S.R., Schwab, C.E., Smith, T.E., Stout, J.H., and Zehner, R.E., 2014, Geologic maps of the eastern Alaska Range, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigations 2014-XX, 75 p., 45 sheets, scale 1:63,360.

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Year Published: 2015

Architecture and evolution of an Early Permian carbonate complex on a tectonically active island in east-central California

The newly named Upland Valley Limestone represents a carbonate complex that developed on and adjacent to a tectonically active island in east-central California during a brief interval of Early Permian (late Artinskian) time. This lithologically unique, relatively thin limestone unit lies within a thick sequence of predominantly siliciclastic...

Stevens, Calvin H.; Magginetti, Robert T.; Stone, Paul
Stevens, C.H., Magginetti, R.T., and Stone, P., 2015, Architecture and evolution of an Early Permian carbonate complex on a tectonically active island in east-central California: Stratigraphy, v. 12, no. 2, p. 167-182.

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Year Published: 2015

Regional implications of new chronostratigraphic and paleogeographic data from the Early Permian Darwin Basin, east-central California

The Darwin Basin developed in response to episodic subsidence of the western margin of the Cordilleran continental shelf from Late Pennsylvanian (Gzhelian) to Early Permian (late Artinskian) time. Subsidence of the basin was initiated in response to continental truncation farther to the west and was later augmented by thrust emplacement of the...

Stevens, Calvin H.; Stone, Paul; Magginetti, Robert T.
Stevens, C.H., Stone, P., and Magginetti, R.T., 2015, Regional implications of new chronostratigraphic and paleogeographic data from the Early Permian Darwin Basin, east-central California: Stratigraphy, v. 12, no. 2, p. 149-166.

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Year Published: 2015

Stratigraphy and paleogeographic significance of a Late Pennsylvanian to Early Permian channeled slope sequence in the Darwin Basin, southern Darwin Hills, east-central California

The complex stratigraphy of late Paleozoic rocks in the southern Darwin Hills consists of regionally extensive Mississippian and Early to Middle Pennsylvanian rocks overlain by latest Pennsylvanian to Early Permian rocks, herein called the Darwin Hills sequence. Deposition of this latter sequence marked the beginning of the Darwin Basin. In...

Stevens, Calvin H.; Stone, Paul; Magginetti, Robert T.; Ritter, Scott M.
Stevens, C.H., Stone, P., Magginetti, R.T., and Ritter, S.M., Stratigraphy and paleogeographic significance of a Late Pennsylvanian to Early Permian channeled slope sequence in the Darwin Basin, southern Darwin Hills, east-central California: Stratigraphy, v. 12, no. 2, p. 185-196.

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Year Published: 2015

Petrology and reservoir quality of the Gaikema Sandstone: Initial impressions

The Division of Geological & Geophysical Surveys (DGGS) and Division of Oil & Gas (DOG) are currently conducting a study of the hydrocarbon potential of Cook Inlet basin (LePain and others, 2011). The Tertiary stratigraphic section of the basin includes coal-bearing units that are prolific gas reservoirs, particularly the Neogene...

Helmold, Kenneth P.; Stanley, Richard G.
Helmold, K.P., and Stanley, R.G., 2015, Petrology and reservoir quality of the Gaikema Sandstone: initial impressions, in Wartes, M.A., Energy-related studies during the 2014 field season, western Cook Inlet, Alaska: Alaska Division of Geological and Geophysical Surveys Preliminary Interpretive Report 2015-5-7, p. 43-48. doi:10.14509/29462, http://dggs.alaska.gov/pubs/id/29462