Magmatism and tectonics in a tilted crustal section through a continental arc, eastern Transverse Ranges and southern Mojave Desert
Andrew P. Barth, J. Lawford Anderson, Carl E. Jacobson, Scott R. Paterson, Joseph L. Wooden
E. M. Duebendorfer, Eugene I. Smith, editor(s)
2008, Book chapter, Field guide to plutons, volcanoes, faults, reefs, dinosaurs, and possible glaciation in selected areas of Arizona, California, and Nevada
This field guide describes a two-and-one-half day transect, from east to west across southern California, from the Colorado River to the San Andreas fault. Recent geochronologic results for rocks along the transect indicate the spatial and temporal relationships between subarc and retroarc shortening and Cordilleran arc magmatism. The transect begins...
Paleoseismicity and neotectonics of the Aleutian subduction zone — An overview
Gary A. Carver, George Plafker
Jeffery T. Freymueller, Peter J. Haeussler, Robert L. Wesson, Goran Ekstrom, editor(s)
2008, Book chapter, Active tectonics and seismic potential of Alaska
The Aleutian subduction zone is one of the most seismically active plate boundaries and the source of several of the world’s largest historic earthquakes. The structural architecture of the subduction zone varies considerably along its length. At the eastern end is a tectonically complex collision zone where the allochthonous Yakutat...
Ecology of coral reefs in the US Virgin Islands
Caroline S. Rogers, Jeff Miller, Erinn Muller, Peter J Edmunds, Richard S. Nemeth, James P. Beets, Alan M. Friedlander, Tyler B. Smith, Rafe Boulon, Christopher F.G. Jeffrey, Charles Menza, Chris Caldow, Nasseer Idrisi, Barbara Kojis, Mark E. Monaco, Anthony S. Spitzack, Elizabeth H. Gladfelter, John C. Ogden, Zandy M Hillis-Star, Ian Lundgren, William B. Schill, Ilsa B. Kuffner, Laurie L. Richardson, Barry E. Devine, Joshua D. Voss
Bernhard Riegl, Richard E. Dodge, editor(s)
2008, Book chapter, Coral reefs in the US Virgin Islands
The US Virgin Islands (USVI ) in the northeastern Caribbean, consist of St. Croix (207 km2), St. Thomas (83 km2), St. John (52 km2) and numerous smaller islands (Dammann and Nellis 1992). They are part of the Lesser Antilles and Leeward Islands on the eastern boundary of the Caribbean plate...
New episodes of volcanism at Kilauea Volcano, Hawaii
Michael P. Poland, Asta Mikijus, Tim R. Orr, J. Sutton, Carl Thornber, David C. Wilson
2008, Eos, Transactions, American Geophysical Union (89) 37-38
Mid‐2007 was a time of intense activity at Kilauea Volcano, Hawaii (see Figure 1). In June, the long‐lived Pu'u 'Ō'ō—Kupaianaha eruption, a dual‐vent system along the east rift zone (ERZ) that has been erupting since 1983 [Heliker et al., 2003], paused due to the outbreak of a new vent farther...
Late-seasonal activity and diet of the evening bat (Nycticeius humeralis) in Nebraska
Keith Geluso, J.P. Damm, E.W. Valdez
2008, Western North American Naturalist (68) 21-24
In North America, Nebraska represents part of the northwestern edge of the distribution for the evening bat (Nycticeius humeralis). To date, little information on this bat's natural history has been published from the state or from other parts of the Great Plains. Here we report on aspects of its natural...
Changes in stream chemistry and biology in response to reduced levels of acid deposition during 1987-2003 in the Neversink River Basin, Catskill Mountains
Douglas A. Burns, K. Riva-Murray, R.W. Bode, S. Passy
2008, Ecological Indicators (8) 191-203
Atmospheric acid deposition has decreased in the northeastern United States since the 1970s, resulting in modest increases in pH, acid-neutralizing capacity (ANC), and decreases in inorganic monomeric aluminum (AlIM) concentrations since stream chemistry monitoring began in the 1980s in the acid-sensitive upper Neversink River basin in the Catskill Mountains of...
Predicting the locations of naturally fishless lakes
Emily Gaenzle Schilling, C.S. Loftin, K.E. Degoosh, Alexander D. Huryn, K.E. Webster
2008, Freshwater Biology (53) 1021-1035
1. Fish have been introduced into many previously fishless lakes throughout North America over the past 100+ years. It is difficult to determine the historical distribution of fishless lakes, however, because these introductions have not always been well-documented. 2. Due to its glacial history and low human population density, the...
Detection rates of the MODIS active fire product in the United States
T. J. Hawbaker, V. C. Radeloff, A.D. Syphard, Z. Zhu, S. I. Stewart
2008, Remote Sensing of Environment (112) 2656-2664
MODIS active fire data offer new information about global fire patterns. However, uncertainties in detection rates can render satellite-derived fire statistics difficult to interpret. We evaluated the MODIS 1??km daily active fire product to quantify detection rates for both Terra and Aqua MODIS sensors, examined how cloud cover and fire...
Trans-Alaska Crustal Transect and continental evolution involving subduction underplating and synchronous foreland thrusting
Gary S. Fuis, Thomas E. Moore, George Plafker, T.M. Brocher, M. A. Fisher, Walter D. Mooney, W. J. Nokleberg, R.A. Page, B. C. Beaudoin, N.I. Christensen, A. R. Levander, W. J. Lutter, R. W. Saltus, N.A. Ruppert
2008, Geology (36) 267-270
We investigate the crustal structure and tectonic evolution of the North American continent in Alaska, where the continent has grown through magmatism, accretion, and tectonic underplating. In the 1980s and early 1990s, we conducted a geological and geophysical investigation, known as the Trans-Alaska Crustal Transect (TACT), along a 1350-km-long corridor...
Mineral sources and transport pathways for arsenic release in a coastal watershed, USA
Nora K. Foley, Robert A. Ayuso
2008, Geochemistry: Exploration, Environment, Analysis (8) 59-75
Metasedimentary bedrock of coastal Maine contains a diverse suite of As-bearing minerals that act as significant sources of elements found in ground and surface waters in the region. Arsenic sources in the Penobscot Formation include, in order of decreasing As content by weight: löllingite and realgar (c.70%), arsenopyrite, cobaltite, glaucodot,...
Postearthquake relaxation after the 2004 M6 Parkfield, California, earthquake and rate-and-state friction
J.C. Savage, J. Langbein
2008, Journal of Geophysical Research B: Solid Earth (113)
An unusually complete set of measurements (including rapid rate GPS over the first 10 days) of postseismic deformation is available at 12 continuous GPS stations located close to the epicenter of the 2004 M6.0 Parkfield earthquake. The principal component modes for the relaxation of the ensemble of those 12 GPS...
Anthropogenic and natural lead isotopes in Fe-hydroxides and Fe-sulphates in a watershed associated with arsenic-enriched groundwater, Maine, USA
Robert A. Ayuso, Nora K. Foley
2008, Geochemistry: Exploration, Environment, Analysis (8) 77-89
A survey of the natural and anthropogenic sources of lead contributing to secondary minerals in sulphidic schists associated with arsenic-enriched groundwater in Coastal Maine shows that the most likely source is natural Pb, particularly from coexisting sulphide minerals. The secondary minerals also reflect notable contributions from anthropogenic Pb. The Pb...
Sensitivity of June near‐surface temperatures and precipitation in the eastern United States to historical land cover changes since European settlement
John E. Strack, Roger A. Pielke Sr., Louis T. Steyaert, Robert G. Knox
2008, Water Resources Research (44) 1-13
Land cover changes alter the near surface weather and climate. Changes in land surface properties such as albedo, roughness length, stomatal resistance, and leaf area index alter the surface energy balance, leading to differences in near surface temperatures. This study utilized a newly developed land cover data set for the...
Impacts of post-glacial lake drainage events and revised chronology of the Champlain Sea episode 13-9 ka
T. M. Cronin, P.L. Manley, S. Brachfeld, T.O. Manley, Debra A. Willard, J.-P. Guilbault, J.A. Rayburn, R. Thunell, M. Berke
2008, Palaeogeography, Palaeoclimatology, Palaeoecology (262) 46-60
Lithologic, CHIRP (Compressed High Intensity Radar Pulse) sonar, paleomagnetic, stable isotopic and micropaleontological analyses of sediment cores from Lake Champlain (New York, Vermont) were used to determine the age of the post-glacial Champlain Sea marine episode, the timing of salinity changes and their relationship to freshwater discharge from mid-continent glacial...
Late Devonian glacial deposits from the eastern United States signal an end of the mid-Paleozoic warm period
D. K. Brezinski, C. B. Cecil, V.W. Skema, R. Stamm
2008, Palaeogeography, Palaeoclimatology, Palaeoecology (268) 143-151
A Late Devonian polymictic diamictite extends for more than 400 km from northeastern Pennsylvania across western Maryland and into east-central West Virginia. The matrix-supported, unbedded, locally sheared diamictite contains subangular to rounded clasts up to 2 m in diameter. The mostly rounded clasts are both locally derived and exotic; some exhibit striations, faceting, and polish. The diamictite commonly is...
SHRIMP-RG U-Pb isotopic systematics of zircon from the Angel Lake orthogneiss, East Humboldt Range, Nevada: Is this really archean crust?
Wayne R. Premo, Pedro Castineiras, Joseph L. Wooden
2008, Geosphere (4) 963-975
New SHRIMP-RG (sensitive high-resolution ion microprobe-reverse geometry) data confirm the existence of Archean components within zircon grains of a sample from the orthogneiss of Angel Lake, Nevada, United States, previously interpreted as a nappe of Archean crust. However, the combined evidence strongly suggests that this orthogneiss is a highly deformed,...
InSAR observations of deformation associated with new episodes of volcanism at Kilauea Volcano, Hawai'i, 2007
Michael P. Poland
2008, Conference Paper, European Space Agency, (Special Publication) ESA SP
In June 2007, the Pu'u 'Ō'ō-Kūpaianaha eruption of Kīlauea Volcano was interrupted when magma intruded the east rift zone (ERZ), resulting in a small extrusion of lava near Makaopuhi Crater. Deformation associated with the activity was exceptionally well-documented by ASAR interferometry, which indicates deflation of the summit and uplift and...
Characteristics of mangrove swamps managed for mosquito control in eastern Florida, USA
B. Middleton, D. Devlin, E. Proffitt, Karen McKee, K.F. Cretini
2008, Marine Ecology Progress Series (371) 117-129
Manipulations of the vegetation and hydrology of wetlands for mosquito control are common worldwide, but these modifications may affect vital ecosystem processes. To control mosquitoes in mangrove swamps in eastern Florida, managers have used rotational impoundment management (RIM) as an alternative to the worldwide practice of mosquito ditching. Levees surround...
New Orleans and Hurricane Katrina. IV: Orleans East Bank (Metro) protected basin
R.B. Seed, R.G. Bea, A. Athanasopoulos-Zekkos, G.P. Boutwell, J.D. Bray, C. Cheung, D. Cobos-Roa, J. Cohen-Waeber, B.D. Collins, L.F. Harder Jr., R. E. Kayen, J.M. Pestana, M.F. Riemer, J.D. Rogers, R. Storesund, X. Vera-Grunauer, Joseph Wartman
2008, Journal of Geotechnical and Geoenvironmental Engineering (134) 762-779
This paper addresses damage caused by Hurricane Katrina to the main Orleans East Bank protected basin. This basin represented the heart of New Orleans, and contained the main downtown area, the historic French Quarter, the Garden District, and the sprawling Lakefront and Canal Districts. Nearly half of the loss of...
Northeast storms ranked by wind stress and wave-generated bottom stress observed in Massachusetts Bay, 1990-2006
B. Butman, C. R. Sherwood, P.S. Dalyander
2008, Continental Shelf Research (28) 1231-1245
Along the coast of the northeastern United States, strong winds blowing from the northeast are often associated with storms called northeasters, coastal storms that strongly influence weather. In addition to effects caused by wind stress, the sea floor is affected by bottom stress associated with these storms. Bottom stress caused...
Micropaleontologic record of late Pliocene and Quaternary paleoenvironments in the northern Albemarle Embayment, North Carolina, U.S.A.
S.J. Culver, K.M. Farrell, D. J. Mallinson, B. P. Horton, Debra A. Willard, E.R. Thieler, S.R. Riggs, S.W. Snyder, J.F. Wehmiller, C.E. Bernhardt, C. Hillier
2008, Palaeogeography, Palaeoclimatology, Palaeoecology (264) 54-77
Micropaleontological data provide a strong actualistic basis for detailed interpretations of Quaternary paleoenvironmental change. The 90 m-thick Quaternary record of the Albemarle Embayment in the mid-Atlantic coastal plain of the USA provides an excellent opportunity to use such an approach in a region where the details of Quaternary environmental change are...
Significance of detrital zircons in upper Devonian ocean-basin strata of the Sonora allochthon and Lower Permian synorogenic strata of the Mina Mexico foredeep, central Sonora, Mexico
F. G. Poole, G. E. Gehrels, John H. Stewart
2008, Special Paper of the Geological Society of America 121-131
U-Pb isotopic dating of detrital zircons from a conglomeratic barite sandstone in the Sonora allochthon and a calciclastic sandstone in the Mina Mexico foredeep of the Minas de Barita area reveals two main age groups in the Upper Devonian part of the Los Pozos Formation, 1.73-1.65 Ga and 1.44-1.42 Ga;...
Influence of dams on river-floodplain dynamics in the Elwha River, Washington
K.K. Kloehn, T.J. Beechie, S.A. Morley, H.J. Coe, J.J. Duda
2008, Northwest Science (82) 224-235
The Elwha dam removal project presents an ideal opportunity to study how historic reduction and subsequent restoration of sediment supply alter river-floodplain dynamics in a large, forested river floodplain. We used remote sensing and onsite data collection to establish a historical record of floodplain dynamics and a baseline of current...
Dislocation models of interseismic deformation in the western United States
F. F. Pollitz, P. McCrory, J. Svarc, J. Murray
2008, Journal of Geophysical Research B: Solid Earth (113)
The GPS-derived crustal velocity field of the western United States is used to construct dislocation models in a viscoelastic medium of interseismic crustal deformation. The interseismic velocity field is constrained by 1052 GPS velocity vectors spanning the ???2500-km-long plate boundary zone adjacent to the San Andreas fault and Cascadia subduction...
Impact effects and regional tectonic insights: Backstripping the Chesapeake Bay impact structure
T. Hayden, M. Kominz, David S. Powars, Lucy E. Edwards, K.G. Miller, J.V. Browning, A.A. Kulpecz
2008, Geology (36) 327-330
The Chesapeake Bay impact structure is a ca. 35.4 Ma crater located on the eastern seaboard of North America. Deposition returned to normal shortly after impact, resulting in a unique record of both impact-related and subsequent passive margin sedimentation. We use backstripping to show that the impact strongly affected sedimentation...
