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2,153 full-text articles. Page 48 of 49.

Depth Compensation For Pressure Transducer Measurements Of Boat Wakes, Jean Ellis, Douglas Sherman, Bernard Bauer 2010 University of South Carolina - Columbia

Depth Compensation For Pressure Transducer Measurements Of Boat Wakes, Jean Ellis, Douglas Sherman, Bernard Bauer

Jean Taylor Ellis

No abstract provided.


Retention Of Beach Sands By Dams And Debris Basins In Southern California, Douglas Sherman, Kamron Barron, Jean Ellis 2010 Texas A&M University

Retention Of Beach Sands By Dams And Debris Basins In Southern California, Douglas Sherman, Kamron Barron, Jean Ellis

Jean Taylor Ellis

No abstract provided.


Effects Of Sampling Frequency On Wave Characterization, Jean Ellis, Douglas Sherman 2010 University of South Carolina - Columbia

Effects Of Sampling Frequency On Wave Characterization, Jean Ellis, Douglas Sherman

Jean Taylor Ellis

No abstract provided.


A Coastal Environment Field And Laboratory Activity For An Undergraduate Geomorphology Course, Jean Ellis, Paul Rindfleisch 2010 University of South Carolina

A Coastal Environment Field And Laboratory Activity For An Undergraduate Geomorphology Course, Jean Ellis, Paul Rindfleisch

Jean Taylor Ellis

A field and laboratory exercise for an undergraduate geomorphology class is described that focuses on the beach. The project requires one day of fieldwork and two laboratory sessions. In the field, students measure water surface fluctuations (waves) with a pressure sensor, survey beach profiles, collect sediment samples, and observe the beach state. In the laboratory, students wash and dry sediments, complete a grain size analysis, and determine sediment volumes. Students produce a report that includes analysis of wave data and beach profiles and a discussion of their findings.


Wave Transformation Across A Rock Platform, Belinho, Portugal, Eugene Farrell, Helena Granja, Lorenzo Cappietti, Jean Ellis, Bailiang Li, Douglas Sherman 2010 Texas A&M University

Wave Transformation Across A Rock Platform, Belinho, Portugal, Eugene Farrell, Helena Granja, Lorenzo Cappietti, Jean Ellis, Bailiang Li, Douglas Sherman

Jean Taylor Ellis

No abstract provided.


Glaciotectonic Deformation Along The Valparaiso Upland In Southwest Michigan, Usa, Brian C. Bird 2010 Western Michigan University

Glaciotectonic Deformation Along The Valparaiso Upland In Southwest Michigan, Usa, Brian C. Bird

Dissertations

Glaciotectonic deformation has been observed and analyzed across parts of the Valparaiso, Kendall, and Inner Kalamazoo Moraines in southwest Michigan, USA. Deformation structures such as folds and faults have been analyzed using techniques typically used by structural geologist along with the fabric of elongated clasts in the surficial diamicton. The structures are consistent with simple shear, horizontal compressional stresses, and pure shear. A series of drumlin fields exist along the western boundary of the study area. Direct investigation of the deformed sediments was conducted at a gravel pit in one of these drumlins. Lacustrine derived sediments interbedded with coarse sand …


Coupled Deformation And Metamorphism, Fabric Development, Rheological Evolution And Strain Localization, Scott E. Johnson 2010 Principal Investigator; University of Maine, Orono

Coupled Deformation And Metamorphism, Fabric Development, Rheological Evolution And Strain Localization, Scott E. Johnson

University of Maine Office of Research Administration: Grant Reports

When Earth's tectonic plates interact with one another the rocks that comprise them are deformed, commonly forming great mountain chains. During this deformation, the minerals that make up the rocks can become spatially or crystallographically aligned to form a fabric. The development of rock fabric is a primary factor affecting the strength, or rheological evolution of deforming rocks. Fabric development commonly involves coupling of both physical and chemical processes. For example, crenulation cleavage is the most common type of fabric in multiply deformed rocks, and its formation leads to extreme mineral segregation and rheological anisotropy. It is also commonly associated …


Diurnal Patterns Of Blowing Sand, John E. Stout 2010 USDA-ARS

Diurnal Patterns Of Blowing Sand, John E. Stout

John E. Stout

The diurnal pattern of blowing sand results from a complex process that involves an interaction between solar heating, thermal instability, atmospheric turbulence, wind strength, and surface threshold conditions. During the day, solar heating produces thermal instability, which enhances the convective mixing of high momentum winds from the upper levels of the atmosphere to the surface layer. The sun also dries the sand surface so that the critical threshold is as low as possible. Thus, in the afternoon, the combination of strong turbulent winds and a low surface threshold increases the likelihood that winds may intermittently exceed the critical threshold of …


Re-Interpreting Great Lakes Shorelines As Components Of Wave-Influenced Deltas: An Example From The Portage River, Lake Erie, Ohio, James E. Evans 2010 Bowling Green State University - Main Campus

Re-Interpreting Great Lakes Shorelines As Components Of Wave-Influenced Deltas: An Example From The Portage River, Lake Erie, Ohio, James E. Evans

James E. Evans

No abstract provided.


Quaternary Geology And Geochronology Of The Uppermost Arkansas Valley, Colorado- Glaciers, Ice Dams, Landslides, And Floods, James P. McCalpin 2010 GEO-HAZ Consulting

Quaternary Geology And Geochronology Of The Uppermost Arkansas Valley, Colorado- Glaciers, Ice Dams, Landslides, And Floods, James P. Mccalpin

James P. McCalpin

This field trip to the uppermost Arkansas Valley of central Colorado is based mainly on work performed since 2008, in an area with a long history of bedrock mapping by renowned geologists of the U.S. Geological Survey beginning in the 1880s (e.g. Emmons, 1886). The Quaternary features of the region were first described by Capps in 1909. Despite over 100 years of intermittent geologic studies here, there were still new discoveries to be made in the past few years. Day 1 of the trip emphasizes landslides (in the morning) and glacial deposits (in the afternoon). The “take-home messages” of the …


Geology And Structure Of The Rough Creek Area, Western Kentucky, William D. Johnson Jr., Howard R. Schwalb 2010 University of Kentucky

Geology And Structure Of The Rough Creek Area, Western Kentucky, William D. Johnson Jr., Howard R. Schwalb

Kentucky Geological Survey Bulletin

The Rough Creek area is a rectangular area about 113 mi east to west and 35 mi north to south encompassing about 3,900 mi2 in west-central and western Kentucky. The Ohio River delineates most of the western border with Illinois and locally also part of the northern border with Indiana. The northeast corner of the area is about 27 mi southwest of Louisville. The principal cities are Owensboro and Henderson.

The Precambrian basement has been penetrated in only two wells in western Kentucky at depths somewhat greater than 14,000 ft. Basement is projected to underlie much of the area …


Geologic Map Of The Nez Perce Drainage Basin, Southwestern Montana, Rose Aimee Feinstein 2010 University of Arkansas, Fayetteville

Geologic Map Of The Nez Perce Drainage Basin, Southwestern Montana, Rose Aimee Feinstein

Inquiry: The University of Arkansas Undergraduate Research Journal

A geologic map of the Nez Perce drainage basin in southwestern Montana offers an understanding of the developing paleotopography of the area following the Laramide orogeny, ca. 65 ma. In this project, a small drainage basin was studied in detail, focusing on the geomorphology, structure, lithology, and ages of the various rock units. Based on the results of these studies and the relationships found among four major gravel units mapped within the basin, the basin development was approximated. The youngest unit is a fine-grained (mean diameter = 8.23 cm) channel deposit within Nez Perce Creek, sourced from within the basin, …


An Inventory And Condition Survey Of The Western Australian Part Of The Nullarbor Region, P A. Waddell, A K. Gardner, P Hennig 2010 Department of Primary Industries and Regional Development, Western Australia

An Inventory And Condition Survey Of The Western Australian Part Of The Nullarbor Region, P A. Waddell, A K. Gardner, P Hennig

Technical Bulletins

The inventory and condition survey of the Western Australian part of the Nullarbor region, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 2005 and 2007, describes and maps the natural resources of the region. This survey report provides a baseline record of the existence and condition of the area's natural resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The Nullarbor region has …


Tectonic Geomorphology Of The Puna Tsang Chhu, Western Bhutan, Abby May Woody 2010 University of Texas at El Paso

Tectonic Geomorphology Of The Puna Tsang Chhu, Western Bhutan, Abby May Woody

Open Access Theses & Dissertations

There are two boundaries, or physiographic transitions, between three distinct topographic regions in Bhutan. The southern and northern regions have relatively steep hillslopes and high relief, while the central region has gentle hillslopes and low relief. The geomorphology of a 70-km stretch along the Puna Tsang Chhu valley between the towns of Uma and Amrimo was studied in March and April of 2009 to provide constraints on the active tectonics of western Bhutan and the nature of these physiographic transitions.

The Puna Tsang Chhu valley contains a set of alluvial cut-and-fill and bedrock (strath) river terraces with associated sediments - …


A Study Of Fold Characteristics And Deformation Style Using The Evolution Of The Land Surface: Zagros Simply Folded Belt, Iran, Caroline M. Burberry, John W. Cosgrove, Jian-Guo Liu 2010 University of Nebraska-Lincoln

A Study Of Fold Characteristics And Deformation Style Using The Evolution Of The Land Surface: Zagros Simply Folded Belt, Iran, Caroline M. Burberry, John W. Cosgrove, Jian-Guo Liu

Papers in the Earth and Atmospheric Sciences

Deformation styles within a fold-thrust belt can be understood in terms of the spatial organization and geometry of the fold structures. In young fold-thrust belts such as the Zagros, this geometry is reflected topographically by concordant landform morphology. Thus, the distribution of deformation structures can be characterized using satellite image analysis, digital elevation models, the drainage network and geomorphological indicators. The two distinct fold types considered in this study (fault-bend folds and detachment folds) both trending NW-SE, interact with streams flowing NE-SW from the High Zagros Mountains into the Persian Gulf. Multiple abandoned stream channels cross fault-bend folds related to …


Development In The Gulf Of Maine: Avoiding Geohazards And Embracing Opportunities, Laura L. Brothers, Joseph T. Kelley, Melissa Landon Maynard, Daniel F. Belknap, Stephen M. Dickson 2010 University of Maine

Development In The Gulf Of Maine: Avoiding Geohazards And Embracing Opportunities, Laura L. Brothers, Joseph T. Kelley, Melissa Landon Maynard, Daniel F. Belknap, Stephen M. Dickson

Maine Policy Review

Mapping for marine-spatial planning is crucial if Maine is to safely develop its offshore resources, espe­cially wind and tidal energy. The authors focus on shallow natural gas (methane) deposits, an important and widespread geohazard in Maine’s seafloor. They describe the origin, occur­rence, and identification of natural gas in Maine’s seafloor; explain the hazards associated with these deposits and how to map them; and discuss what Maine can learn from European nations that have already developed their offshore wind resources. Because the U.S. gives states a central role in coastal management, Maine has the chance to be proactive in delineating coastal …


Nebraska Statewide Groundwater-Level Monitoring Report 2010, J. T. Korus, M. E. Burbach, L. M. Howard, R. M. Joeckel 2010 University of Nebraska-Lincoln

Nebraska Statewide Groundwater-Level Monitoring Report 2010, J. T. Korus, M. E. Burbach, L. M. Howard, R. M. Joeckel

Conservation and Survey Division

No abstract provided.


Holdrege: Nebraska's State Soil, 2010 University of Nebraska - Lincoln

Holdrege: Nebraska's State Soil

Conservation and Survey Division

No abstract provided.


Observations Of Storm Morphodynamics Using Coastal Lidar And Radar Imaging System (Claris): Importance Of Wave Refraction And Dissipation Over Complex Surf-Zone Morphology At A Shoreline Erosional Hotspot, Katherine L. Brodie 2010 College of William and Mary - Virginia Institute of Marine Science

Observations Of Storm Morphodynamics Using Coastal Lidar And Radar Imaging System (Claris): Importance Of Wave Refraction And Dissipation Over Complex Surf-Zone Morphology At A Shoreline Erosional Hotspot, Katherine L. Brodie

Dissertations, Theses, and Masters Projects

Elevated water levels and large waves during storms cause beach erosion, overwash, and coastal flooding, particularly along barrier island coastlines. While predictions of storm tracks have greatly improved over the last decade, predictions of maximum water levels and variations in the extent of damage along a coastline need improvement. In particular, physics based models still cannot explain why some regions along a relatively straight coastline may experience significant erosion and overwash during a storm, while nearby locations remain seemingly unchanged. Correct predictions of both the timing of erosion and variations in the magnitude of erosion along the coast will be …


Modeling Shoreline Change And Resulting Wetland Response Due To Erosion And Sea-Level Rise: A Case Study In Dorchester County, Maryland, Mirtha Karinna Nunez 2010 College of William and Mary - Virginia Institute of Marine Science

Modeling Shoreline Change And Resulting Wetland Response Due To Erosion And Sea-Level Rise: A Case Study In Dorchester County, Maryland, Mirtha Karinna Nunez

Dissertations, Theses, and Masters Projects

The present study was focused on developing a shoreline change forecast and wetland response model for Dorchester County, MD, to evaluate the vulnerability of wetlands to shoreline erosion and inundation due to relative sea level rise. The model considers the following forces involved in wetland stability and sustainability: inundation (as a function of topography and sea-level rise), shoreline erosion, vertical accretion and horizontal migration. To predict the long-term risk to nearshore wetlands and the potential habitat zone for wetlands in the next 50 years, shoreline change due to inundation and erosion/accretion was assessed within the frameworks of two-dimensional and three-dimensional …


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