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Articles 1 - 11 of 11
Full-Text Articles in Physical Sciences and Mathematics
Temperature-Time History Of Subducted Continental-Crust, Mount Olympos Region, Greece, Elizabeth R. Schermer, Daniel R. Lux, B. Clark Burchfiel
Temperature-Time History Of Subducted Continental-Crust, Mount Olympos Region, Greece, Elizabeth R. Schermer, Daniel R. Lux, B. Clark Burchfiel
Earth Science Faculty Scholarship
In the Mt. Olympos region of northeastern Greece, continental margin strata and basement rocks were subducted and metamorphosed under blueschist facies conditions, and thrust over carbonate platform strata during Alpine orogenesis. Subsequent exposure of the subducted basement rocks by normal faulting has allowed an integrated study of the timing of metamorphism, its relationship to deformation, and the thermal history of the subducted terrane. Alpine low-grade metamorphic assemblages occur at four structural levels. Three thrust sheets composed of Paleozoic granitic basement and Mesozoic metasedimentary cover were thrust over Mesozoic carbonate rocks and Eocene flysch; thrusting and metamorphism occurred first in the …
Serendibite From The Northwest Adirondack Lowlands, In Russell, New York, Usa, Edward S. Grew, Martin G. Yates, William Delorraine
Serendibite From The Northwest Adirondack Lowlands, In Russell, New York, Usa, Edward S. Grew, Martin G. Yates, William Delorraine
Earth Science Faculty Scholarship
No abstract provided.
Tb138: Variability Factors Involved With Land Application Of Papermill Sludge, Charles R. Kraske, Ivan J. Fernandez
Tb138: Variability Factors Involved With Land Application Of Papermill Sludge, Charles R. Kraske, Ivan J. Fernandez
Technical Bulletins
The goal of this case study was to assess two components of variability associated with the land application of papermill sludge. These included (1) changes occurring within a temporary sludge stockpile, and (2) spatial variability of application to the site. Understanding the magnitude of such changes will assist in accounting for variability inherent in such land application operations.
Tb137: Chemical And Physical Properties Of The Aurelie, Burnham, Easton, Lille, Linneus, Monadnock, Nicholville, And Tunbridge Soil Map Units, Robert V. Rourke
Tb137: Chemical And Physical Properties Of The Aurelie, Burnham, Easton, Lille, Linneus, Monadnock, Nicholville, And Tunbridge Soil Map Units, Robert V. Rourke
Technical Bulletins
Eight soil map units were sampled at five locations in Maine. The morphology of each site was described and samples were taken from each pedon by horizon for laboratory analyses. Soil samples were analyzed to determine their physical and chemical properties. The data were compiled into composite soil profiles using weighted means. Soil profile descriptions accompanied by the analyses of each pedon sampled are presented.
Age Of The Peach Springs Tuff, Southeastern California And Western Arizona, J. E. Nielson, Daniel R. Lux, G. B. Dalrymple, A. F. Glazner
Age Of The Peach Springs Tuff, Southeastern California And Western Arizona, J. E. Nielson, Daniel R. Lux, G. B. Dalrymple, A. F. Glazner
Earth Science Faculty Scholarship
Sanidine separates from pumice of the early Miocene Peach Springs Tuff are concordantly dated at 18.5 ± 0.2 Ma by two isotopic techniques. The Peach Springs Tuff is the only known unit that can be correlated between isolated outcrops of Miocene strata from the central Mojave Desert of southeastern California to the western Colorado Plateau in Arizona, across five structural provinces, a distance of 350 km. Thus the age of the Peach Springs Tuff is important to structural and paleogeographic reconstructions of a large region. Biotite and sanidine separates from bulk samples of the Peach Springs Tuff from zones of …
A Northern Hemisphere Volcanic Chemistry Record (1869-1984) And Climatic Implications Using A South Greenland Ice Core, W. B. Lyons, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, T. E. Graedel
A Northern Hemisphere Volcanic Chemistry Record (1869-1984) And Climatic Implications Using A South Greenland Ice Core, W. B. Lyons, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, T. E. Graedel
Earth Science Faculty Scholarship
The effect of volcanic emISSIOn of acidic aerosols on climate is well documented. The presence of acid droplets in the stratosphere can reduce transmissivity and hence decrease surface temperatures. Since the amount and chemical composition of erupted material has important effects on regional climate, knowledge of past volcanic events is of extreme importance. Detailed glaciochemical records provide the only milieu wherein the geochemistry of paleovolcanic events can be fully documented. We present a detailed sulfate and chloride record from an ice core drilled at site 20 D, 40 km SW of Dye 3 in southern Greenland. The record spans the …
Detailed Glaciochemical Investigations In Southern Victoria Land, Antarctica — A Proxy Climate Record, Paul Andrew Mayewski
Detailed Glaciochemical Investigations In Southern Victoria Land, Antarctica — A Proxy Climate Record, Paul Andrew Mayewski
Earth Science Faculty Scholarship
The production of environmental change records using time-series data retrieved from ice cores has seen minimal application in the Transantarctic Mountains despite the existence of a well-developed lower resolution glacial geologic record for this area which forms the primary basis for understanding the glacial history of East Antarctica. In addition, records derived from marine and lake cores, glacier margin fluctuation studies, measures of volcanic activity, and meteorological data sets from within or close to the Transantarctic Mountains are available for comparison. This emerging environmental data-base provides the tools needed to define the change characteristics, over a period of thousands of …
A 1400-Year Oxygen Isotope History From The Ross Sea Area, Antarctica, P. M. Grootes, M. Stuiver, T. L. Saling, Paul Andrew Mayewski, M. J. Spencer, R. B. Alley, D. Jenssen
A 1400-Year Oxygen Isotope History From The Ross Sea Area, Antarctica, P. M. Grootes, M. Stuiver, T. L. Saling, Paul Andrew Mayewski, M. J. Spencer, R. B. Alley, D. Jenssen
Earth Science Faculty Scholarship
Four ice cores from the Ross Sea drainage, Antarctica, show patterns of δ18O variations on a time scale of decades to centuries over the last 1400 years without change in the long-term average δ18O. Century scale δ18O fluctuations in the two cores drilled in the Ross Ice Shelf at Station J-9 (82° 23' S, 168° 38' W, elevation 60 m) are highly correlated (P < 2 x 10-4). The long isotope record (>30 000 a) of the 1978 1-9 core thus represents local conditions over at least 102 m and on time scales of 100 …
A Review Of Central Asian Glaciochemical Data, Cameron P. Wake, Paul Andrew Mayewski, Mary Jo Spencer
A Review Of Central Asian Glaciochemical Data, Cameron P. Wake, Paul Andrew Mayewski, Mary Jo Spencer
Earth Science Faculty Scholarship
The glaciers of central Asia provide suitable locations from which to recover continuous, high-resolution glaciochemical records on a continental scale. Although the glaciochemical investigations undertaken to date in central Asia are few in number and limited in terms of spatial coverage and length of record, some preliminary observations can be made concerning regional and seasonal trends in snow chemistry in this region.
The sodium chloride ratio for most snow samples collected in central Asia approaches the ratio found in sea water (0.86 in μeq kg-1), reflecting a marine source for these constituents. Sodium and chloride concentrations are, on …
A Glaciochemical Survey Of The Summit Region, Greenland, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, S. Whitlow
A Glaciochemical Survey Of The Summit Region, Greenland, Paul Andrew Mayewski, M. J. Spencer, M. S. Twickler, S. Whitlow
Earth Science Faculty Scholarship
Spatial representativeness and an understanding of controls on chemical species distribution are essential requirements of any significant ice core investigation. Snowpit studies provide an essential tool in this process. In preparation for the central Greenland deep drilling effort a series of snowpits was sampled in detail for oxygen isotopes, major anions, major cations, total acidity and radionuclides. The results of this sampling program are used to define: (I) the chemical composition of the snow in the region, (2) the input timing and spatial distribution of major chemical species, (3) the potential dependence of species concentration on accumulation rate, and (4) …
The Dominion Range Ice Core, Queen Maud Mountains, Antarctica—General Site And Core Characteristics With Implications, Paul Andrew Mayewski, Mark S. Twickler, William Berry Lyons, Mary Jo Spencer, Debra A. Meese, Anthony J. Gow, Pieter Grootes, Todd Sowers, M. Scott Watson, Eric Saltzman
The Dominion Range Ice Core, Queen Maud Mountains, Antarctica—General Site And Core Characteristics With Implications, Paul Andrew Mayewski, Mark S. Twickler, William Berry Lyons, Mary Jo Spencer, Debra A. Meese, Anthony J. Gow, Pieter Grootes, Todd Sowers, M. Scott Watson, Eric Saltzman
Earth Science Faculty Scholarship
The Transantarctic Mountains of East Antarctica provide a new milieu for retrieval of ice-core records. We report here on the initial findings from the first of these records, the Dominion Range ice-core record. Sites such as the Dominion Range are valuable for the recovery of records detailing climate change, volcanic activity, and changes in the chemistry of the atmosphere. The unique geographic location of this site and a relatively low accumulation rate combine to provide a relatively long record of change for this potentially sensitive climatic region. As such, information concerning the site and general core characteristics are presented, including …