Conference Papers
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Landsat Data Continuity Mission, now Landsat-8: six months on-orbit Landsat Data Continuity Mission, now Landsat-8: six months on-orbit
The Landsat Data Continuity Mission (LDCM) with two pushbroom Earth-imaging sensors, the Operational Land Imager (OLI) and the Thermal InfraRed Sensor (TIRS), was launched on February 11, 2013. Its on-orbit check out period or commissioning phase lasted about 90 days. During this phase the spacecraft and its instruments were activated, operationally tested and their performance verified...
Authors
Brian L. Markham, James C. Storey, James R. Irons
Paleogeographic insights based on new U-Pb dates for altered tuffs in the Miocene Barstow Formation, California Paleogeographic insights based on new U-Pb dates for altered tuffs in the Miocene Barstow Formation, California
The type section of the Barstow Formation in the Mud Hills, north of Barstow, is a reference section for early to middle Miocene paleontology, magnetostratigraphy, and dated volcanic episodes. Thanks to this robust chronologic framework, much of the interpretation of the paleogeography of the region from about 18 Ma to 13 Ma is based on study of the rocks in the Mud Hills. Eastward from...
Authors
David M. Miller, Jose E. Rosario, Shannon R. Leslie, Jorge A. Vazquez
Proterozoic to Cenozoic geology above, within and beneath the Blue Ridge Composite Thrust Sheet as exposed along the Blue Ridge Parkway in the Peaks of Otter region, central Virginia Blue Ridge: Guidebook for the 43rd Annual Virginia Geological Field Con Proterozoic to Cenozoic geology above, within and beneath the Blue Ridge Composite Thrust Sheet as exposed along the Blue Ridge Parkway in the Peaks of Otter region, central Virginia Blue Ridge: Guidebook for the 43rd Annual Virginia Geological Field Con
No abstract available.
Authors
Mark W. Carter, C. Scott Southworth, John N. Aleinikoff
Status and trends of pelagic prey fishes in Lake Huron, 2012 Status and trends of pelagic prey fishes in Lake Huron, 2012
The USGS Great Lakes Science Center (GLSC) conducted acoustic/midwater trawl surveys of Lake Huron during 1997 and annually during 2004-2012. The 2012 survey was conducted during September and October, and included transects in Lake Huron’s Main Basin, Georgian Bay, and North Channel. Pelagic fish density (638 fish/ha) was lower in 2012 compared to 2011, with density in 2012 only 34% of...
Authors
David M. Warner, Timothy P. O’Brien, Steve A. Farha, Jeff Schaeffer, Stephen Lenart
Unraveling Alleghanian orogenesis in southern Connecticut: The history of the Lyme Dome Unraveling Alleghanian orogenesis in southern Connecticut: The history of the Lyme Dome
No abstract available.
Authors
Gregory J. Walsh, John N. Aleinikoff, Robert P. Wintsch
Basin thickness variations at the Junction of the Eastern California Shear Zone and the San Bernardino Mountains, California: How thick could the Pliocene sections be? Basin thickness variations at the Junction of the Eastern California Shear Zone and the San Bernardino Mountains, California: How thick could the Pliocene sections be?
We estimate the thickness of Neogene basin fill along the junction of the Eastern California Shear Zone and the North Frontal thrust system of the San Bernardino Mountains using gravity data with geologic and well log constraints. The geometry of the basin fill is of interest for groundwater assessment and location of potential faults, as well as providing an upper bound on the thickness...
Authors
Victoria E. Langenheim, Tammy L. Surko, Phillip A. Armstrong, Jonathan C. Matti
Using computational modeling of river flow with remotely sensed data to infer channel bathymetry Using computational modeling of river flow with remotely sensed data to infer channel bathymetry
As part of an ongoing investigation into the use of computational river flow and morphodynamic models for the purpose of correcting and extending remotely sensed river datasets, a simple method for inferring channel bathymetry is developed and discussed. The method is based on an inversion of the equations expressing conservation of mass and momentum to develop equations that can be...
Authors
Jonathan M. Nelson, Richard R. McDonald, Paul J. Kinzel, Y. Shimizu
Summary of the geology of the northern part of the Sierra Cuchillo, Socorro and Sierra Counties, southwestern New Mexico Summary of the geology of the northern part of the Sierra Cuchillo, Socorro and Sierra Counties, southwestern New Mexico
The northern part of the Sierra Cuchillo is located within the northeastern part of the Mogollon-Datil volcanic field west of the Rio Grande rift in the Basin and Range Province, approximately 50 km northwest of Truth or Consequences in south-central New Mexico. The Sierra Cuchillo is a north-south, elongated horst block composed of Tertiary volcanic and intrusive rocks, sparse outcrops...
Authors
Florian Maldonado
Redox reaction rates in shallow aquifers: Implications for nitrate transport in groundwater and streams Redox reaction rates in shallow aquifers: Implications for nitrate transport in groundwater and streams
Groundwater age and water chemistry data along flow paths from recharge areas to streams were used to evaluate the trends and transformations of agricultural chemicals. Results from this analysis indicate that median nitrate recharge concentrations in these agricultural areas have increased markedly over the last 50 years from 4 mg N/L in samples collected prior to 1983 to 7.5 mg N/L in...
Authors
Anthony J. Tesoriero
Canada Basin revealed Canada Basin revealed
More than 15,000 line-km of new regional seismic reflection and refraction data in the western Arctic Ocean provide insights into the tectonic and sedimentologic history of Canada Basin, permitting development of new geologic understanding in one of Earth's last frontiers. These new data support a rotational opening model for southern Canada Basin. There is a central basement ridge...
Authors
David C. Mosher, John Shimeld, Deborah R. Hutchinson, D Chian, Nina Lebedeva-Ivanova, Ruth Jackson
3-D reconstructions of subsurface Pleistocene basalt flows from paleomagnetic inclination data and 40Ar/39Ar ages in the southern part of the Idaho National Laboratory (INL), Idaho (USA) 3-D reconstructions of subsurface Pleistocene basalt flows from paleomagnetic inclination data and 40Ar/39Ar ages in the southern part of the Idaho National Laboratory (INL), Idaho (USA)
The U. S. Geological Survey, in cooperation with the U.S. Department of Energy, is mapping the distribution of basalt flows and sedimentary interbeds at the Idaho National Laboratory in three dimensions to provide data for refining numerical models of groundwater flow and contaminant transport in the eastern Snake River Plain aquifer. Paleomagnetic inclination and polarity data from...
Authors
Mary K. V. Hodges, Duane E. Champion, B. D. Turrin, C. C. Swisher
Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects
Models based upon coastal engineering equations have been developed to quantify wind fetch length and several physical wave characteristics including significant height, length, peak period, maximum orbital velocity, and shear stress. These models were used to quantify differences in proposed island construction designs for three Habitat Rehabilitation and Enhancement Projects (HREPs) in...
Authors
Jason J. Rohweder, James T. Rogala, Barry L. Johnson, Dennis Anderson, Steve Clark, Ferris Chamberlin