Geologic map of the central San Juan caldera cluster, southwestern Colorado
Peter W. Lipman
2006, IMAP I-2799
The San Juan Mountains are the largest erosional remnant of a composite volcanic field that covered much of the southern Rocky Mountains in middle Tertiary time. The San Juan field consists mainly of intermediate-composition lavas and breccias, erupted about 35-30 Ma from scattered central volcanoes (Conejos Formation) and overlain by...
Flood of July 12-13, 2004, Burlington and Camden Counties, South-Central New Jersey
Amy R. Protz, Timothy J. Reed
2006, Scientific Investigations Report 2006-5096
Intense rainfall inundated south-central New Jersey on July 12-13, 2004, causing major flooding with heavy property, road, and bridge damage in Burlington and Camden Counties. Forty-five dams were topped or damaged, or failed completely. The affected areas were in the Rancocas Creek, Cooper River, and Pennsauken Creek Basins. The U.S. Geological...
Potentiometric Surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and Vicinity, Florida, May 2006
Sandra L. Kinnaman
2006, Open-File Report 2006-1394
Introduction: This map depicts the potentiometric surface of the Upper Floridan aquifer in the St. Johns River Water Management District and vicinity for May 2006. Potentiometric contours are based on water-level measurements collected at 599 wells during the period May 14-31, near the end of the dry season. Some contours...
Pore-Water Quality in the Clay-Silt Confining Units of the Lower Miocene Kirkwood Formation and Hypothetical Effects on Water Quality in the Atlantic City 800-Foot Sand, Northeastern Cape May County, New Jersey, 2001
Zoltan Szabo, Elizabeth A. Keller, Rose M. Defawe
2006, Scientific Investigations Report 2006-5134
Pore water was extracted from clay-silt core samples collected from a borehole at Ocean View, west of Sea Isle City, in northeastern Cape May County, New Jersey. The borehole intersects the lower Miocene Kirkwood Formation, which includes a thick sand and gravel unit between two clay-silt units. The sand and...
Factors Affecting Firm Yield and the Estimation of Firm Yield for Selected Streamflow-Dominated Drinking-Water-Supply Reservoirs in Massachusetts
Marcus C. Waldron, Stacey A. Archfield
2006, Scientific Investigations Report 2006-5044
Factors affecting reservoir firm yield, as determined by application of the Massachusetts Department of Environmental Protection's Firm Yield Estimator (FYE) model, were evaluated, modified, and tested on 46 streamflow-dominated reservoirs representing 15 Massachusetts drinking-water supplies. The model uses a mass-balance approach to determine the maximum average daily withdrawal rate that...
Vascular Plant and Vertebrate Inventory of Gila Cliff Dwellings National Monument
Brian F. Powell, Eric W. Albrecht, William L. Halvorson, Cecilia A. Schmidt, Kathleen Docherty, Pamela Anning
2006, Open-File Report 2005-1187
Executive Summary This report summarizes the results of the first comprehensive biological inventory of Gila Cliff Dwellings National Monument (NM) in western New Mexico. This project was part of a larger effort to inventory plants and vertebrates in eight National Park Service units in Arizona and New Mexico. Our surveys address...
The World Coal Quality Inventory: South America
Susan J. Tewalt, Linda J. Bragg, Robert B. Finkelman
Alex W. Karlsen, editor(s)
2006, Open-File Report 2006-1241
Executive Summary-Introduction: The concepts of a global environment and economy are strongly and irrevocably linked to global energy issues. Worldwide coal production and international coal trade are projected to increase during the next several decades in an international energy mix that is still strongly dependent on fossil fuels. Therefore, worldwide coal...
The Interface Between Theory and Data in Structural Equation Models
James B. Grace, Kenneth A. Bollen
2006, Open-File Report 2006-1363
Structural equation modeling (SEM) holds the promise of providing natural scientists the capacity to evaluate complex multivariate hypotheses about ecological systems. Building on its predecessors, path analysis and factor analysis, SEM allows for the incorporation of both observed and unobserved (latent) variables into theoretically based probabilistic models. In this paper...
Bioindicators from Mosquitofish (Gambusia affinis) Sampled from the Imperial Valley in Southern California
Jill A. Jenkins, Rassa O. Draugelis-Dale
2006, Open-File Report 2006-1307
The Sonny Bono Salton Sea National Wildlife Refuge (SSNWR) is located 64 km north of the Mexican border at the southern end of the Salton Sea in California's Imperial Valley. Freshwater ponds and managed habitats at the SSNWR, Calipatria, Calif. are supplied with Colorado River water that carries compounds from...
Pesticides in Ground Water of the Maryland Coastal Plain
Judith M. Denver, Scott W. Ator
2006, Fact Sheet 2006-3119
Selected pesticides are detectable at low levels (generally less than 0.1 microgram per liter) in unconfined ground water in many parts of the Maryland Coastal Plain. Samples were recently collected (2001-04) from 47 wells in the Coastal Plain and analyzed for selected pesticides and degradate compounds (products of pesticide degradation)....
Surface-Water Quality and Nutrient Loads in the Nepaug Reservoir Watershed, Northwestern Connecticut, 1999-2001
Jonathan Morrison, Michael J. Colombo
2006, Scientific Investigations Report 2006-5272
Water quality was characterized at three tributary watersheds to the Nepaug Reservoir-Nepaug River, Phelps Brook, and Clear Brook-from October 1998 through September 2001 to document existing water-quality conditions and evaluate potential future effects of the removal of sand and gravel from areas of the watershed. Some removal operations may include...
Archive of digital boomer seismic reflection data collected during USGS Cruise 97CCT01 offshore of central South Carolina, June 1997
Karynna Calderon, Shawn V. Dadisman, Jack L. Kindinger, James G. Flocks, M. Scott Harris, Philip R. Thompson
2006, Data Series 203
In June of 1997, the U.S. Geological Survey, in cooperation with Coastal Carolina University, conducted a geophysical survey of the shallow geologic framework of the continental shelf offshore of central South Carolina from the Isle of Palms to Bull Island. This report serves as an archive of unprocessed digital boomer...
Archive of digital boomer seismic reflection data collected during USGS field activity 04SGI01 in the Withlacoochee River of West-Central Florida, March 2004
Karynna Calderon, Shawn V. Dadisman, Dann K. Yobbi, W. Scott McBride, James G. Flocks, Dana S. Wiese
2006, Data Series 119
In March of 2004, the U.S. Geological Survey conducted a geophysical survey in the Withlacoochee River of west-central Florida. This report serves as an archive of unprocessed digital boomer seismic reflection data, trackline maps, navigation files, GIS information, Field Activity Collection System (FACS) logs, observer's logbook, and FGDC metadata. Filtered...
Piceance Creek Basin, Colorado, Oil Shale Geodatabase
Water Resources Division, U.S. Geological Survey
2006, Data Series 181
This geodatabase is a digital reproduction of three legacy USGS oil shale publications--MF-958 (Pitman and Johnson, 1978), MF-1069 (Pitman, 1979), and OC-132 (Pitman and others, 1990). The database consists of 106 feature classes in three feature datasets organized by publication. Each dataset contains isopach contours, isoresource contours, isoresource polygons, and...
Water Quality, Hydrology, and Response to Changes in Phosphorus Loading of Nagawicka Lake, a Calcareous Lake in Waukesha County, Wisconsin
Herbert S. Garn, Dale M. Robertson, William J. Rose, Gerald L. Goddard, Judy A. Horwatich
2006, Scientific Investigations Report 2006-5273
Nagawicka Lake is a 986-acre, usually mesotrophic, calcareous lake in southeastern Wisconsin. Because of concern over potential water-quality degradation of the lake associated with further development in its watershed, a study was conducted by the U.S. Geological Survey from 2002 to 2006 to describe the water quality and hydrology of...
Garnet--An Essential Industrial Mineral and January's Birthstone
James G. Evans, Phillip R. Moyle, David G. Frank, Donald W. Olson
2006, Fact Sheet 2006-3149
Garnet is one of the most common minerals in the world. Occurring in almost any color, it is most widely known for its beauty as a gem stone. Because of its hardness and other properties, garnet is also an essential industrial mineral used in abrasive products, non-slip surfaces, and filtration....
Proceedings of the 4th New World Luminescence Dating and Dosimetry Workshop, Denver, Colorado, May 31 June 2, 2006
Richard A. Wise, editor(s)
2006, Open-File Report 2006-1351
Introduction: Optically stimulated luminescence (OSL) is one of a class of measurements known as stimulated phenomena. Such phenomena may be stimulated thermally or optically and the reader is referred to works by Aitken (1998) and Botter-Jensen and others (2003) for more detail. In recent years OSL has become a popular...
Sedimentation in Goose Pasture Tarn, 1965-2005, Breckenridge, Colorado
John G. Elliott, Stephen J. Char, Samuel M. Linhart, V. Cory Stephens, Gregory B. O’Neill
2006, Scientific Investigations Report 2006-5265
Goose Pasture Tarn, a 771-acre-foot reservoir in Summit County, Colorado, is the principal domestic water-storage facility for the Town of Breckenridge and collects runoff from approximately 42 square miles of the upper Blue River watershed. In the 40 years since the reservoir was constructed, deltaic deposits have accumulated at the...
Ground-water-quality data for a treated-wastewater plume undergoing natural restoration, Ashumet Valley, Cape Cod, Massachusetts
Jennifer G. Savoie, Richard L. Smith, Douglas B. Kent, Kathryn M. Hess, Denis R. LeBlanc, Larry B. Barber
2006, Data Series 198
A plume of contaminated ground water extends from former disposal beds at the Massachusetts Military Reservation wastewater-treatment plant toward Ashumet Pond, and farther southward toward coastal ponds and Vineyard Sound, Cape Cod, Massachusetts. Treated sewage-derived wastewater was discharged to the rapid-infiltration beds for nearly 60 years before the disposal site...
Bathymetric contour maps of lakes surveyed in Iowa in 2004
S. Mike Linhart, Kris D. Lund
2006, Scientific Investigations Map 2949
The U.S. Geological Survey, in cooperation with the Iowa Department of Natural Resources, conducted bathymetric surveys on six lakes in Iowa during 2004 (Lake Darling, Littlefield Lake, Lake Minnewashta, Nine Eagles Lake, Prairie Rose Lake, and Upper Gar Lake). The surveys were conducted to provide the Iowa Department of Natural...
Surficial Geologic Map of the Clinton-Concord-Grafton-Medfield 12-Quadrangle Area in East Central Massachusetts
Janet Radway Stone, Byron D. Stone
2006, Open-File Report 2006-1260-A
The surficial geologic map shows the distribution of nonlithified earth materials at land surface in an area of twelve 7.5-minute quadrangles (total 660 square miles) in east-central Massachusetts. The geologic map differentiates surficial materials of Quaternary age on the basis of their lithologic characteristics (grain size, sedimentary structures, mineral and...
Mapping ground water in three dimensions: An analysis of airborne geophysical surveys of the Upper San Pedro River Basin, Cochise County, southeastern Arizona
Jeff Wynn
2006, Professional Paper 1674
This report summarizes the results of two airborne geophysical surveys conducted in the upper San Pedro Valley of southeastern Arizona in 1997 and 1999. The combined surveys cover about 1,000 square kilometers and extend from the Huachuca Mountains on the west to the Mule Mountains and Tombstone Hills on the...
Gravity and Aeromagnetic Gradients within the Yukon-Tanana Upland, Black Mountain Tectonic Zone, Big Delta Quadrangle, east-central Alaska
R. W. Saltus, W. C. Day
2006, Open-File Report 2006-1391
The Yukon-Tanana Upland is a complex composite assemblage of variably metamorphosed crystalline rocks with strong North American affinities. At the broadest scale, the Upland has a relatively neutral magnetic character. More detailed examination, however, reveals a fundamental northeast-southwest-trending magnetic gradient, representing a 20-nT step (as measured at a flight height...
Estimates of Shear Stress and Measurements of Water Levels in the Lower Fox River near Green Bay, Wisconsin
Stephen M. Westenbroek
2006, Scientific Investigations Report 2006-5226
Turbulent shear stress in the boundary layer of a natural river system largely controls the deposition and resuspension of sediment, as well as the longevity and effectiveness of granular-material caps used to cover and isolate contaminated sediments. This report documents measurements and calculations made in order to estimate shear stress...
Back to the basics: Lake Tahoe, California /Nevada: Geography and mathematics
Lawrence R. Handley, Catherine M. Lockwood, Nathan Handley
2006, Journal of Geography (105) 225-230
Back to the Basics: Lake Tahoe, California/Nevada* continues the Wetland Education Through Maps and Aerial Photography (WETMAAP) Program of exercises on teaching foundational map reading and spatial differentiation skills. It is the third published exercise from the Back to the Basics series developed by the WETMAAP Program. The current exercise...
