Landscape geochemistry near mineralized areas of eastern Alaska: Chapter H in Recent U.S. Geological Survey studies in the Tintina Gold Province, Alaska, United States, and Yukon, Canada--results of a 5-year project
Bronwen Wang, Larry P. Gough, Richard B. Wanty, James G. Crock, Gregory K. Lee, Warren C. Day, Jim Vohden
2007, Scientific Investigations Report 2007-5289-H
The Pogo lode gold deposit was discovered in eastern Alaska in the early 1990s and provided the opportunity to study elemental distribution and mobility in the natural environment prior to mine development. Studying mineralized systems prior to mining allows us to compare the natural biogeochemical signature in mineralized versus nonmineralized...
Cartographic production for the Florida Shelf Habitat (FLaSH) map study: generation of surface grids, contours, and KMZ files
Lisa L. Robbins, Mark Hansen, Ellen Raabe, Paul O. Knorr, Joseph Browne
2007, Open-File Report 2007-1397
The Florida shelf represents a finite source of economic resources, including commercial and recreational fisheries, tourism, recreation, sand and gravel resources, phosphate, and freshwater reserves. Yet the basic information needed to locate resources, or to interpret and utilize existing data, comes from many sources, dates, and formats. A multi-agency effort...
Structure of the central Terror Rift, western Ross Sea, Antarctica
Jerome Hall, Terry Wilson, Stuart Henrys
2007, Open-File Report 2007-1047-SRP-108
The Terror Rift is a zone of post-middle Miocene faulting and volcanism along the western margin of the West Antarctic Rift System. A new seismic data set from NSF geophysical cruise NBP04-01, integrated with the previous dataset to provide higher spatial resolution, has been interpreted in this study in order...
Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team, 2006
Charles C. Schwartz, Mark A. Haroldson, Karrie K. West, editor(s)
2007, Report
The contents of this Annual Report summarize results of monitoring and research from the 2006 field season. The report also contains a summary of nuisance grizzly bear (Ursus arctos horribilis) management actions. The Interagency Grizzly Bear Study Team (IGBST) continues to work on issues associated with counts of unduplicated females with...
USGS Tampa Bay Pilot Study
K. K. Yates, T. M. Cronin, M. Crane, M. Hansen, A. Nayeghandi, P. Swarzenski, T. Edgar, G. R. Brooks, B. Suthard, A. Hine, S. Locker, Debra A. Willard, D. Hastings, B. Flower, D. Hollander, R.A. Larson, K. Smith
2007, Report, Baywide Environmental Monitoring Report, 2002-2005
Many of the nation's estuaries have been environmentally stressed since the turn of the 20th century and will continue to be impacted in the future. Tampa Bay, one the Gulf of Mexico's largest estuaries, exemplifies the threats that our estuaries face (EPA Report 2001, Tampa Bay Estuary Program-Comprehensive Conservation and...
Seismic facies and stratigraphy of the Cenozoic succession in McMurdo Sound, Antarctica: Implications for tectonic, climatic and glacial history
C.R. Fielding, J. Whittaker, S.A. Henrys, T. J. Wilson, T.R. Nash
2007, Open-File Report 2007-1047-SRP-090
A new stratigraphic model is presented for the evolution of the Cenozoic Victoria Land Basin of the West Antarctic Rift, based on integration of seismic reflection and drilling data. The Early Rift phase (?latest Eocene to Early Oligocene) comprises wedges of strata confined by early extensional faults, and which contain...
Triggering mechanism and tsunamogenic potential of the Cape Fear Slide complex, U.S. Atlantic margin
Matthew J. Hornbach, Luc L. Lavier, Carolyn D. Ruppel
2007, Geochemistry, Geophysics, Geosystems (8)
Analysis of new multibeam bathymetry data and seismic Chirp data acquired over the Cape Fear Slide complex on the U.S. Atlantic margin suggests that at least 5 major submarine slides have likely occurred there within the past 30,000 years, indicating that repetitive, large-scale mass wasting and associated tsunamis may be...
Basement and crustal structure of the Davis Sea region (East Antarctica): implications for tectonic setting and continent to oceanic boundary definition
Y.B. Guseva, G.L. Leitchenkov, V.V. Gandyukhin, S.V. Ivanov
2007, Open-File Report 2007-1047-SRP-025
This study is based on about 8400 km of MCS, magnetic and gravity data as well as 20 sonobuoys collected by the Russian Antarctic Expedition during 2003 and 2004 in the Davis Sea and adjacent areas between 80°E and 102°E. Major tectonic provinces and features are identified and mapped in...
GIS data for the Seaside, Oregon, Tsunami Pilot Study to modernize FEMA flood hazard maps
Florence L. Wong, Angie J. Venturato, Eric L. Geist
2007, Conference Paper, Proceedings of Coastal Zone '07
A Tsunami Pilot Study was conducted for the area surrounding the coastal town of Seaside, Oregon, as part of the Federal Emergency Management's (FEMA) Flood Insurance Rate Map Modernization Program (Tsunami Pilot Study Working Group, 2006). The Cascadia subduction zone extends from Cape Mendocino, California, to Vancouver Island, Canada. The...
The contribution of geomagnetic observatories and magnetic models to the study of secular variation and jerks in Antarctica
A. Meloni, L. Cafarella, P. De Michelis, R. Tozzi
2007, Open-File Report 2007-1047-SRP-071
Some of the most interesting features of the geomagnetic field and its time variations are displayed in polar areas. Observatory monthly means usually provide an excellent opportunity to study the temporal changes of the magnetic field at a given location. Unfortunately, on the Antarctic continent the distribution of the permanent ground- based observatories...
Tectonics of the West Antarctic rift system: new light on the history and dynamics of distributed intracontinental extension
C.S. Siddoway
2007, Open-File Report 2007-1047-KP-09
The West Antarctic rift system (WARS) is the product of multiple stages of intracontinental deformation from Jurassic to Present. The Cretaceous rifting phase accomplished >100 percent extension across the Ross Sea and central West Antarctica, and is widely perceived as a product of pure shear extension orthogonal to the Transantarctic...
Seismic and chronostratigraphic results from SHALDRIL II, northwestern Weddell Sea
J.B. Anderson, J. Wellner, S. Wise, S. Bohaty, P. Manley, T. Smith, F. Weaver, D. Kulhanek
2007, Open-File Report 2007-1047-SRP-094
The 2006 SHALDRIL II cruise was conducted in the northwestern Weddell Sea, with primary drilling targets in the James Ross Basin. A site drilled along the northern edge of the James Ross Basin sampled either latest Eocene or earliest Oligocene deposits, providing a lower chronostratigraphic benchmark for our seismic stratigraphic...
Regional seismic stratigraphic correlations of the Ross Sea: Implications for the tectonic history of the West Antarctic Rift System
Robert C. Decesari, Christopher C. Sorlien, Bruce P. Luyendyk, Douglas S. Wilson, Louis Bartek, John Diebold, Sarah E. Hopkins
2007, Open-File Report 2007-1047-SRP-052
Using existing and new seismic reflection data, new and updated correlations of late Oligocene-early Miocene RSS-2 strata were made between the southern parts of Ross Sea basins. Previous studies documented Cretaceous extension across much of Ross Sea. We interpret that Cenozoic extension also occurred across Ross Sea. Subsidence during and...
A pan-Precambrian link between deglaciation and environmental oxidation
T.J. Raub, J.L. Kirschvink
2007, Open-File Report 2007-1047-KP-08
Despite a continuous increase in solar luminosity to the present, Earth’s glacial record appears to become more frequent, though less severe, over geological time. At least two of the three major Precambrian glacial intervals were exceptionally intense, with solid evidence for widespread sea ice on or near the equator, well...
Jurassic silicic volcanism in the Transantarctic Mountains: Was it related to plate margin processes or to Ferrar magmatism?
D.H. Elliot, T.H. Fleming, K.A. Foland, C.M. Fanning
2007, Open-File Report 2007-1047-SRP-051
Silicic volcanism in the Transantarctic Mountains, represented by rhyolitic tuff that mainly precedes emplacement of the Ferrar Large Igneous Province, is important in interpretation of the tectonic evolution of the Antarctic sector of Gondwana. Sr and Nd isotope data indicate that the tuffs are not directly related to Ferrar magmatism...
Statistical methods for paleovector analysis
Jeffrey J. Love
2007, Book chapter, Encyclopedia of geomagnetism and paleomagnetism
Our concern is with the statistical description of paleomagnetic vectors and the estimation of their mean and variance. These vectors may come from a number of different rock units or archeological samples, representing a range of acquisition times, and be useful for studies of the mean paleomagnetic field and <i class="EmphasisTypeItalic...
Integration of seafloor point data in usSEABED
Jane A. Reid, S. Jeffress Williams, Mark Zimmermann, Chris Jenkins, Nadine E. Golden
2007, Conference Paper, Proceedings of Coastal Zone '07
Sediments of the beach, nearshore, and continental shelves record a complex interplay of processes including wave energy and direction , currents, beach erosion or accretion, bluff or cliff retreat, fluvial input, sediment longshore and cross-shelf transport processes, contaminant content and transport, sediment sources and sinks, and others. In turn, sediments...
Observatories, program in USA
Jeffrey J. Love, J.B. Townshend
2007, Book chapter, Encyclopedia of geomagnetism and paleomagnetism
The Geomagnetism Program of the US Geological Survey has, for over a century now, monitored the Earth's magnetic field through a network of magnetic observatories and conducted scientific analysis on the data collected. The program traces its origins to the Reorganization Act of 1843, in which Congress authorized the creation...
Cretaceous and Tertiary extension throughout the Ross Sea, Antarctica
Robert C. Decesari, Douglas C. Wilson, Bruce P. Luyendyk, Michael Faulkner
2007, Open-File Report 2007-1047-SRP-098
Marine geophysical data from the deep sea adjacent to the Ross Sea, Antarctica suggest that 70 km of extension occurred between East and West Antarctica from 46 to 2 Ma. The Northern and Victoria Land Basins in the western Ross Sea adjacent to the Transantarctic Mountains accommodated 95 km of...
Magnetic indices
Jeffrey J. Love, K.J. Remick
2007, Book chapter, Encyclopedia of geomagnetism and paleomagnetism
Magnetic indices are simple measures of magnetic activity that occurs, typically, over periods of time of less than a few hours and which is recorded by magnetometers at ground‐based observatories (Mayaud, 1980; Rangarajan, 1989; McPherron, 1995). The variations that indices measure have their origin in the Earth's ionosphere and magnetosphere....
New magnetic anomaly map of East Antarctica and surrounding regions
A. Golynsky, D. Blankenship, Massimo Chiappini, D. Damaske, Fausto Ferraccioli, C. Finn, D. Golynsky, A. Goncharov, T. Ishihara, S. Ivanov, W. Jokat, H.R. Kim, M. Konig, Valery Masolov, Y. Nogi, M. Sand, M. Studing, ADMAP Working Group
2007, Open-File Report 2007-1047-SRP-050
More than 500,000 line-km of new airborne and shipborne data, recently acquired by the international community over East Antarctica and surrounding regions, significantly upgrade the Antarctic Digital Magnetic Anomaly Project (ADMAP) compilation and lead to substantial improvements in magnetic anomaly pattern recognition. New data have been matched in one inverse operation...
Coupling alongshore variations in wave energy to beach morphologic change using the SWAN wave model at Ocean Beach, San Francisco, CA
Jodi L. Eshleman, Patrick L. Barnard, Li H. Erikson, Daniel M. Hanes
2007, Conference Paper, 10th International Workshop on Wind Hindcasting and Forecasting and Coastal Hazard Symposium: North Shore, Oahu, November 11-16, 2007
Coastal managers have faced increasing pressure to manage their resources wisely over the last century as a result of heightened development and changing environmental forcing. It is crucial to understand seasonal changes in beach volume and shape in order to identify areas vulnerable to accelerated erosion. Shepard (1950) was among...
Swash zone characteristics at Ocean Beach, San Francisco, CA
L. H. Erikson, D.M. Hanes, P.L. Barnard, A. E. Gibbs
2007, Conference Paper, Coastal engineering 2006: proceedings of the 30th international conference: San Diego, California, USA, 3-8 September 2006
Runup data collected during the summer of 2005 at Ocean Beach, San Francisco, CA are analyzed and considered to be typical summer swash characteristics at this site. Analysis shows that the beach was dissipative with Iribarren numbers between 0.05 and 0.4 and that infragravity energy dominated. Foreshore slopes were mild...
The United States Polar Rock Repository: A geological resource for the Earth science community
Annie M. Grunow, David H. Elliot, Julie E. Codispoti
2007, Open-File Report 2007-1047-SRP-068
The United States Polar Rock Repository (USPRR) is a U. S. national facility designed for the permanent curatorial preservation of rock samples, along with associated materials such as field notes, annotated air photos and maps, raw analytic data, paleomagnetic cores, ground rock and mineral residues, thin sections, and microfossil mounts,...
Outcrop descriptions and fossils from the Upper Cretaceous Frontier Formation, Wind River Basin and adjacent areas, Wyoming: Chapter 11 in Petroleum systems and geologic assessment of oil and gas resources in the Wind River Basin Province, Wyoming
E.A. Merewether, W. A. Cobban
2007, Data Series 69-J-11
The Wind River Basin of central Wyoming trends west-northwest from near the community of Alcova to near the town of Dubois (fig. 1). On the perimeter of the basin, outcrops of the Frontier Formation were examined and described during the years 1972-1975. Invertebrate fossils were collected from those outcrops during...
