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Articles 1 - 30 of 7107

Full-Text Articles in Geology

A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib Nov 2017

A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib

David M. Borrok

Water of poor quality can directly impact the budget of water available for key user groups. Despite this importance, methods for quantifying the impact of water quality on water availability remain elusive. Here, we develop a new framework for incorporating the impact of water quality on water supply by modifying the Water Supply Stress Index (WaSSI). We demonstrate the usefulness of the framework by investigating the impact of high salinity waters on the availability of irrigation water for agriculture in Louisiana. The WaSSI was deconstructed into sectoral components such that the total available water supply could be reduced for a ...


Assessing The Periodic Groundwater Flow Conditions Of A Perched Aquifer System In The Daniel Boone National Forest, Ethan Sweet Nov 2017

Assessing The Periodic Groundwater Flow Conditions Of A Perched Aquifer System In The Daniel Boone National Forest, Ethan Sweet

Posters-at-the-Capitol

Assessing the Periodic Groundwater Flow Conditions of a Perched Aquifer System in the Daniel Boone National Forest

Ethan Sweet and Jonathan Malzone

Eastern Kentucky University, Department of Geosciences

Natural ephemeral wetlands situated among the ridge-tops in the Daniel Boone National Forest serve as reservoirs that recharge a shallow groundwater system. Unique interactions between surface and groundwater in these isolated systems provide substantial support for the native ecosystem, serving as a breeding ground for amphibians and as source water for vegetation—especially in periods of drought. Currently it is not understood how groundwater could provide regional biodiversity, a drought buffer, or ...


An Integrated Analysis Of The Oppliger And Harkness Oil Fields Using Well Log Data And 3d Seismic Data, Casey B. Langdon Nov 2017

An Integrated Analysis Of The Oppliger And Harkness Oil Fields Using Well Log Data And 3d Seismic Data, Casey B. Langdon

Masters Theses

Subsurface mapping from well points and 3D seismic interpretation are essential techniques used to study and locate structures in petroleum exploration. In this study, subsurface structure maps, detailed well log facies analysis, 3D seismic interpretation, and attribute analysis were used to map a Mississippian interval and middle Pennsylvanian age interval from two oil fields in Ness County, Kansas. The objective of this study is to analyze formation properties and facies distribution, map middle Pennsylvanian Cherokee channel deposits using seismic data, and to construct a structural model highlighting important features effecting oil production. Results show that the stratigraphic succession of this ...


A Study Of Marine Terrace Formation Along The California Central Coast, Mary C. Devlin Nov 2017

A Study Of Marine Terrace Formation Along The California Central Coast, Mary C. Devlin

Natural Resources Management and Environmental Sciences

Marine terrace formation is in many instances attributed to wave action, and shore platforms are often called “wave-cut”. However, alternative models for marine terrace formation suggest that other types of physical and chemical weathering have a more central role in the formation of marine terraces than is widely acknowledged. Roering and Retallack (2012) concluded that the roles of subaerial physical and chemical weathering are significant, and played a major role in the formation of the terraces. In this study, weathering of beach cliffs and shore platforms associated with marine terraces at eight sites in two different locations along the central ...


A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib Oct 2017

A Framework For Incorporating The Impact Of Water Quality On Water Supply Stress: An Example From Louisiana, David M. Borrok, Jian Chen, Hisham Eldardiry, Emad Habib

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Water of poor quality can directly impact the budget of water available for key user groups. Despite this importance, methods for quantifying the impact of water quality on water availability remain elusive. Here, we develop a new framework for incorporating the impact of water quality on water supply by modifying the Water Supply Stress Index (WaSSI). We demonstrate the usefulness of the framework by investigating the impact of high salinity waters on the availability of irrigation water for agriculture in Louisiana. The WaSSI was deconstructed into sectoral components such that the total available water supply could be reduced for a ...


Reference Data Set Of Volcanic Ash Physicochemical And Optical Properties, A. Vogel, S. Diplas, A. J. Durant, A. S. Azar, M. F. Sunding, William I. Rose, A. Sytchkova, C. Bonadonna, K. Krüger, A. Stohl Oct 2017

Reference Data Set Of Volcanic Ash Physicochemical And Optical Properties, A. Vogel, S. Diplas, A. J. Durant, A. S. Azar, M. F. Sunding, William I. Rose, A. Sytchkova, C. Bonadonna, K. Krüger, A. Stohl

William I. Rose

Uncertainty in the physicochemical and optical properties of volcanic ash particles creates errors in the detection and modeling of volcanic ash clouds and in quantification of their potential impacts. In this study, we provide a data set that describes the physicochemical and optical properties of a representative selection of volcanic ash samples from nine different volcanic eruptions covering a wide range of silica contents (50–80 wt % SiO2). We measured and calculated parameters describing the physical (size distribution, complex shape, and dense-rock equivalent mass density), chemical (bulk and surface composition), and optical (complex refractive index from ultraviolet to near-infrared ...


Martian Cave Air-Movement Via Helmholtz Resonance, Kaj E. Williams, Timothy N. Titus, Chris H. Okubo, Glen E. Cushing Oct 2017

Martian Cave Air-Movement Via Helmholtz Resonance, Kaj E. Williams, Timothy N. Titus, Chris H. Okubo, Glen E. Cushing

International Journal of Speleology

Infrasonic resonance has previously been measured in terrestrial caves by other researchers, where Helmholtz resonance has been suggested as the plausible mechanism resulting in periodic wind reversals within cave entrances. We extend this reasoning to possible Martian caves, where we examine the characteristics of four atypical pit craters (APCs) on Tharsis, suggested as candidate cave entrance locations. The results show that, for several possible cave air movement periods, we are able to infer the approximate cave volumes. The utility of inferring cave volumes for planetary cave exploration is discussed.


C1: Applying The Cosmogenic Nuclide Dipstick Model For Deglaciation Of Mt. Washington, P. Thompson Davis, Alexandria J. Koester, Jeremy D. Shakun, Paul R. Bierman, Lee B. Corbett Oct 2017

C1: Applying The Cosmogenic Nuclide Dipstick Model For Deglaciation Of Mt. Washington, P. Thompson Davis, Alexandria J. Koester, Jeremy D. Shakun, Paul R. Bierman, Lee B. Corbett

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 247-272.


C2: Field Relations, Petrography And Provenance Of Mafic Dikes, Western Maine, David Gibson, Donald Osthoff, Chase Rerrick Oct 2017

C2: Field Relations, Petrography And Provenance Of Mafic Dikes, Western Maine, David Gibson, Donald Osthoff, Chase Rerrick

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 273-286.


C4: The New Hampshire Spherulitic Rhyolites: Rocks Of Importance To Prehistoric Native Americans, Sarah Baker, Boisvert Richard, J. Dykstra Eusden, Nathan Hamilton, Stephen Pollock Oct 2017

C4: The New Hampshire Spherulitic Rhyolites: Rocks Of Importance To Prehistoric Native Americans, Sarah Baker, Boisvert Richard, J. Dykstra Eusden, Nathan Hamilton, Stephen Pollock

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 305-316.


C5: The Sandy River Re-Visited, Julia Daly, Thomas Eastler, Daniel Locke Oct 2017

C5: The Sandy River Re-Visited, Julia Daly, Thomas Eastler, Daniel Locke

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 317-326.


C6: Migmatites In Pinkham Notch, New Hampshire, Tim Allen Oct 2017

C6: Migmatites In Pinkham Notch, New Hampshire, Tim Allen

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 327-344.


C3: Transect From The Migmatized Central Maine Belt To The Bronson Hill Anticlinorium, J. Dykstra Eusden, Sarah Baker, Jordan Cargill, Eric Divan, Ian Hillenbrand, Paul O'Sullivan, Audrey Wheatcroft Oct 2017

C3: Transect From The Migmatized Central Maine Belt To The Bronson Hill Anticlinorium, J. Dykstra Eusden, Sarah Baker, Jordan Cargill, Eric Divan, Ian Hillenbrand, Paul O'Sullivan, Audrey Wheatcroft

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 287-304.


Evaluating The East Java Tsunami Hazard: What Can Newly-Discovered Imbricate Coastal Boulder Accumulations Near Pacitan And At Pantai Papuma, Indonesia Tell Us?, William Nile Meservy Oct 2017

Evaluating The East Java Tsunami Hazard: What Can Newly-Discovered Imbricate Coastal Boulder Accumulations Near Pacitan And At Pantai Papuma, Indonesia Tell Us?, William Nile Meservy

All Theses and Dissertations

Our paleotsunami surveys of the southern Java coast led to the discovery of five imbricate coastal boulder fields near Pacitan, Indonesia that may date to the mid-to-late 19th century or prior and two similar fields at Pantai Papuma and Pantai Pasir Putih that were tsunami-emplaced during the 1994 7.9 Mw event in East Java. Estimated ages for the fields near Pacitan are based on historical records and radiocarbon analyses of coral boulders. The largest imbricated boulders in fields near Pacitan and in East Java are similar in size (approximately 3 m^3) and are primarily composed of platy beachrock ...


Development And Testing Of The Valence Multipole Model Oh Potential For Use In Molecular Dynamics Simulation, Charles Stephen Andros Oct 2017

Development And Testing Of The Valence Multipole Model Oh Potential For Use In Molecular Dynamics Simulation, Charles Stephen Andros

All Theses and Dissertations

Here we describe the fitting and testing, via molecular dynamics simulation, of a bond-order potential for water with a unique force field parameterization. Most potentials for water, including some bond-order (reactive) potentials, are based on a traditional, many-body decomposition to describe water's structure with bond stretch, angle bend, electrostatics, and non-bonded terms. Our model uses an expanded version of the Bond Valence Model, the Valence Multipole Model, to describe all aspects of molecular structure using multibody, bond-order terms. Prior work successfully related these multibody, bond order terms to energy, provided the structures were close to equilibrium. The success of ...


B5: Geology Of The Lower Ellis River Valley And Rumford Whitecap Mountain, Andover And Rumford, Maine, Lindsay J. Spigel, Amber T.H. Whittaker, Ryan P. Gordon Sep 2017

B5: Geology Of The Lower Ellis River Valley And Rumford Whitecap Mountain, Andover And Rumford, Maine, Lindsay J. Spigel, Amber T.H. Whittaker, Ryan P. Gordon

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 197-216.


B1: Geology Of The Bald Mountain-Saddleback Wind Range, West-Central Maine, Douglas N. Reusch, Jake Hansen Sep 2017

B1: Geology Of The Bald Mountain-Saddleback Wind Range, West-Central Maine, Douglas N. Reusch, Jake Hansen

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 119-134.


B3: Paleo-Dunes And Other Post-Glacial Oddities In The Woods And Fields Of New Sharon And Chesterville, Me, Patricia M. Millette, Benjamin Andrews, Anna Glass, Thaddeus Gunther, Roshan Luick Sep 2017

B3: Paleo-Dunes And Other Post-Glacial Oddities In The Woods And Fields Of New Sharon And Chesterville, Me, Patricia M. Millette, Benjamin Andrews, Anna Glass, Thaddeus Gunther, Roshan Luick

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 161-176.


B2: Glacial Deposits And Late-Glacial To Postglacial Alluvial Fans In The Northwestern White Mountians, New Hampshire, Woodrow B. Thompson, Gregory Barker Sep 2017

B2: Glacial Deposits And Late-Glacial To Postglacial Alluvial Fans In The Northwestern White Mountians, New Hampshire, Woodrow B. Thompson, Gregory Barker

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 135-160.


B6: Devonian Granite Melt Transfer In Western Maine: Relations Between Deformation, Metamorphism, Melting And Pluton Emplacement At The Migmatite Front, Gary S. Solar, Paul B. Tomascak, Michael Brown Sep 2017

B6: Devonian Granite Melt Transfer In Western Maine: Relations Between Deformation, Metamorphism, Melting And Pluton Emplacement At The Migmatite Front, Gary S. Solar, Paul B. Tomascak, Michael Brown

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 217-246.


B4: Bedrock Geology Of Mt. Washington, Presidential Range, Nh, J. Dykstra Eusden, Brigit Anderson, Carlos Castro, Patrick Gardner, Chris Guiterman, Stephanie Higgins, Kelley Kugel, Adam Reid, Charles Rodda, Caitlin Tamposi Sep 2017

B4: Bedrock Geology Of Mt. Washington, Presidential Range, Nh, J. Dykstra Eusden, Brigit Anderson, Carlos Castro, Patrick Gardner, Chris Guiterman, Stephanie Higgins, Kelley Kugel, Adam Reid, Charles Rodda, Caitlin Tamposi

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 177-196.


Petrophysical Investigations Of The Marathon Cu-Pge Deposit, Marathon, On, Hiruni Gunawardana Sep 2017

Petrophysical Investigations Of The Marathon Cu-Pge Deposit, Marathon, On, Hiruni Gunawardana

Electronic Thesis and Dissertation Repository

Drill core samples obtained from four mineralized zones of the Marathon Cu-PGE deposit in the Coldwell igneous complex have been investigated for their petrophysical characteristics. Remanent magnetization was used as a possible tool to reorient core samples but a drilling induced overprint magnetization dominated the record. Anisotropy of magnetic susceptibility was measured to provide a proxy for the petrofabric of samples obtained from oriented drill cores; a well-defined planar fabric was found to strike 177 and dip 25°W, with down-dip lineation, in excellent agreement with inferred magmatic flow direction based on 3D modeling of mineralized footwall troughs. Magnetite rich ...


A6: Stratigraphic And Structural Traverse Of Mount Moriah And The Wild River Wilderness Area, Tim Allen Sep 2017

A6: Stratigraphic And Structural Traverse Of Mount Moriah And The Wild River Wilderness Area, Tim Allen

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 105-118.


A2: Smalls Falls Revisted: A Journey Through A Paleozoic Sedimentary Basin, M. R. Van Baalen, Douglas N. Reusch, John F. Slack Sep 2017

A2: Smalls Falls Revisted: A Journey Through A Paleozoic Sedimentary Basin, M. R. Van Baalen, Douglas N. Reusch, John F. Slack

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 35-60.


A5: Grafton Notch State Park: Glacial Gorges And Streams Under Pressure In The Mahoosic Range, Maine, Alice M. Doughty, Woodrow B. Thompson Sep 2017

A5: Grafton Notch State Park: Glacial Gorges And Streams Under Pressure In The Mahoosic Range, Maine, Alice M. Doughty, Woodrow B. Thompson

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 95-104.


A3: Hydrogeology Of The Former Chlor-Alkali Facility Superfund Site And Downstream Bed Sediment Mercury Contamination In The Androscoggin River, Berlin, New Hampshire, James Degnan, Darryl Luce, Andrew Hoffman, Ann Chalmers Sep 2017

A3: Hydrogeology Of The Former Chlor-Alkali Facility Superfund Site And Downstream Bed Sediment Mercury Contamination In The Androscoggin River, Berlin, New Hampshire, James Degnan, Darryl Luce, Andrew Hoffman, Ann Chalmers

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 61-80.


A1: Lithium-Boron-Beryllium Gem Pegmatites, Oxford Co., Maine: Havey And Mount Mica Pegmatites, William B. Simmons, Alexander U. Falster, Karen L. Webber, Myles M. Felch, Dwight C. Bradley Sep 2017

A1: Lithium-Boron-Beryllium Gem Pegmatites, Oxford Co., Maine: Havey And Mount Mica Pegmatites, William B. Simmons, Alexander U. Falster, Karen L. Webber, Myles M. Felch, Dwight C. Bradley

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 1-34.


A4: Possible Post-Laurentide Cirque Glaciation In The Great Gulf Presidential Range, New Hampshire, Brian Fowler, Dulin Ian Sep 2017

A4: Possible Post-Laurentide Cirque Glaciation In The Great Gulf Presidential Range, New Hampshire, Brian Fowler, Dulin Ian

New England Intercollegiate Geological Conference 2017

Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 81-94.


Guidebook For Field Trips In Western Maine And Northern New Hampshire, Beverly Johnson, J.Dykstra Eusden Sep 2017

Guidebook For Field Trips In Western Maine And Northern New Hampshire, Beverly Johnson, J.Dykstra Eusden

New England Intercollegiate Geological Conference 2017

New England Intercollegiate Geological Conference, 109th Annual Meeting, September 29 - October 1, 2017, Bethel, Maine, 345 p, color.


Constraining The Holocene Extent Of The Northwest Meers Fault, Oklahoma Using High-Resolution Topography And Paleoseismic Trenching, Kristofer Tyler Hornsby Sep 2017

Constraining The Holocene Extent Of The Northwest Meers Fault, Oklahoma Using High-Resolution Topography And Paleoseismic Trenching, Kristofer Tyler Hornsby

Dissertations and Theses

The Meers Fault (Oklahoma) is one of few seismogenic structures with Holocene surface expression in the stable continental region of North America. Only the ~37 km-long southeastern section of the ~55 km long Meers Fault is interpreted to be Holocene-active. The ~17 km-long northwestern section is considered to be Quaternary-active (pre-Holocene); however, its low-relief geomorphic expression and anthropogenic alteration have presented difficulties in evaluating the fault length and style of Holocene deformation. We reevaluate surface expression and earthquake timing of the northwestern portion of the Meers Fault to improve fault characterization, earthquake rupture models, and seismic hazard evaluations based on ...