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Assessing The Impact Of Sea Level Rise On Small Isles And Cays In Puerto Rico, Pablo Llerandi-Román, Kyle Siemer, William Neal, David Bush, Chester Jackson 2009 Grand Valley State University

Assessing The Impact Of Sea Level Rise On Small Isles And Cays In Puerto Rico, Pablo Llerandi-Román, Kyle Siemer, William Neal, David Bush, Chester Jackson

Chester W. Jackson

No abstract provided.


Determination Of Chlorofluorocarbon Apparent Ages In Groundwater From The West Side Of The Island Of Hawaii, Jacque Kelly, Craig Glenn 2009 Georgia Southern University

Determination Of Chlorofluorocarbon Apparent Ages In Groundwater From The West Side Of The Island Of Hawaii, Jacque Kelly, Craig Glenn

Jacque L. Kelly

Large quantities of nutrient-enriched groundwater are supplied to coastal west Hawaii via point-sourced and diffuse groundwater seepage sites as submarine groundwater discharge. These inputs are especially important given that they are the only freshwater source to the coastal zone due to the absence of perennial streams. It has been suggested that discharging groundwaters are less than 50 years old; yet, the apparent ages of these groundwaters have not been investigated, despite the copious water volumes discharging to the coastal zone. Apparent age data is crucial to fully understand nutrient transformations along groundwater flow paths and will help constrain groundwater residence ...


Environmental Geology, James Reichard 2009 Georgia Southern University

Environmental Geology, James Reichard

James S. Reichard

Environmental Geology is an exciting new entry for introductory geology courses. This text skillfully weaves the important themes of energy, human interactions, and global climate systems into a readable and contemporary view of geologic processes within the environmental framework. In addition, the author has utilized specific learning aids to pique student interest and to enhance the learning experience.


Very Rapid Geomagnetic Field Change Recorded By The Partial Remagnetization Of A Lava Flow, Scott Bogue, Jonathan Glen 2009 Occidental College

Very Rapid Geomagnetic Field Change Recorded By The Partial Remagnetization Of A Lava Flow, Scott Bogue, Jonathan Glen

Scott Bogue

A new paleomagnetic result from a lava flow with a distinctive, two-part remanence reinforces the controversial hypothesis that geomagnetic change during a polarity reversal can be much faster than normal. The 3.9-m-thick lava (“Flow 20”) is exposed in the Sheep Creek Range (north central Nevada) and was erupted during a reverse-to-normal (R-N) geomagnetic polarity switch at 15.6 Ma. Flow 20 began to acquire a primary thermoremanence while the field was pointing east and down but was soon buried, reheated, and partially-remagnetized in a north-down direction by the 8.2-m-thick flow that succeeded it. A simple conductive cooling calculation ...


Upscaling And Downscaling Submarine Groundwater Discharge And Nutrient Fluxes By Combining In Situ Measurements With Aerial Infrared Imaging, Craig Glenn, W. Burnett, Paul Lucey, A. Johnson, R. Peterson, Jacque Kelly 2009 University of Hawaii at Manoa

Upscaling And Downscaling Submarine Groundwater Discharge And Nutrient Fluxes By Combining In Situ Measurements With Aerial Infrared Imaging, Craig Glenn, W. Burnett, Paul Lucey, A. Johnson, R. Peterson, Jacque Kelly

Jacque L. Kelly

High-resolution (0.1 C, 0.5 m) aerial thermal infrared (TIR) imagery from the dry western coasts of the large volcanic island of Hawaii provides exact locations and fine-scale mixing structures of both diffusive flows and more than 50 buoyant submarine groundwater discharge (SGD) point-sourced “plumes” dispersing into the ocean. The plumes are cool, brackish, nutrient-rich groundwaters injected into and floating on top of warm tropical seawater. SGD fluxes were estimated using continuously-measured 222Rn and salinity for six of the largest discharge locations. We then used a proportionality between plume surface area discharge rate of the larger plumes to approximate ...


Sexual Dimorphism In American Mastodons (Mammut Americanum) And African Elephants (Loxodonta Africana, Loxodonta Cyclotis): A Multivariate Comparison, Kathlyn Smith, Daniel Fisher 2009 Georgia Southern University

Sexual Dimorphism In American Mastodons (Mammut Americanum) And African Elephants (Loxodonta Africana, Loxodonta Cyclotis): A Multivariate Comparison, Kathlyn Smith, Daniel Fisher

Kathlyn M. Smith

Characteristics of social structure, mating strategies, and parental investment can be inferred for mammalian species based on degree of sexual dimorphism, especially when males are substantially larger than females. African elephants (Loxodonta africana, Loxodonta cyclotis) exhibit marked dimorphism in tusk size and show behaviors typical of strongly dimorphic species. American mastodons (Mammut americanum) also exhibit pronounced tusk dimorphism, but mastodons and elephants diverged from a most recent common ancestor over 25 Ma, so whether the two genera exhibit similarities in behavior must be inferred. Similar behavioral traits in mastodons and elephants could be supported if patterns of tusk dimorphism are ...


Coastal Hazards Assessment And Recommendations For A Severely Eroding Tropical Shoreline: Palo Seco, Puerto Rico, Andrew Maloof, Rochelle Petruccelli, Chester Jackson, David Bush 2009 University of West Georgia

Coastal Hazards Assessment And Recommendations For A Severely Eroding Tropical Shoreline: Palo Seco, Puerto Rico, Andrew Maloof, Rochelle Petruccelli, Chester Jackson, David Bush

Chester W. Jackson

Palo Seco is a small community, but it plays an important role in Puerto Rico’s culture, recreation, and infrastructure. Palo Seco is located just west of San Juan, on the eastern flank of Ensenada de Boca Vieja, a major coastal bay and distinct coastal compartment. Palo Seco is home to a major source of electricity for the metropolitan area, the Palo Seco thermoelectric power plant. Also, just offshore is Isla de Cabras, an important historical and recreational site, connected to the mainland by a causeway that can be accessed only via a local road that is also the main ...


A Palynological Investigation Of The Central Depression On St. Catherines Island, Georgia, Shannon Ferguson, Frederick Rich, Robert Vance 2009 Georgia Southern University

A Palynological Investigation Of The Central Depression On St. Catherines Island, Georgia, Shannon Ferguson, Frederick Rich, Robert Vance

Frederick J. Rich

St. Catherines Island, Georgia, is a barrier island characteristic of the Georgia Bight. It is composed of a late Pleistocene core, with younger Holocene age sediment surrounding it. A linear topographic low exists along the length of the island’s late Pleistocene core, and has an unknown origin. This Central Depression (CD), has not been addressed by any previous work, leaving its underlying geologic characteristics unknown. Historic accounts recall artesian springs on St. Catherines Island as recently as the 18th century, but whatever their source, they are now gone. The purpose of this study is to use standard palynological techniques ...


Aspires Student Research Scholarship, Adam Middleton, Mark Welford 2009 Georgia Southern University

Aspires Student Research Scholarship, Adam Middleton, Mark Welford

Mark R. Welford

No abstract provided.


Diurnal Patterns Of Blowing Sand, John Stout 2009 USDA-ARS

Diurnal Patterns Of Blowing Sand, John 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 ...


Assessing The Impact Of Geosciences Laboratories On Student Learning: Who Benefits From Introductory Labs, Karl Nelson, Kristin Huysken, Zoran Kilibarda 2009 Indiana University - Northwest

Assessing The Impact Of Geosciences Laboratories On Student Learning: Who Benefits From Introductory Labs, Karl Nelson, Kristin Huysken, Zoran Kilibarda

Zoran Kilibarda

Laboratories serve as an integral part of geoscience education at most colleges and universities. While anecdotal evidence supports the beneficial impact of laboratories on science class learning, little quantitative research backs this statement. This study compared classroom data from students who completed a geoscience laboratory in conjunction with an introductory-level lecture-based course to those who completed the lecture course only. Laboratory-enrolled students performed better in the lecture class, resulting in an increase of 5.5% in their final class score. Even after controlling for GPA, laboratory enrollment accounted for a statistically significant proportion of the variance. Nontraditional students (age 25 ...


Teacher Quality Grant – (St. Catherines Sea Turtle Conservation Program), R. Vance, Gale Bishop 2009 Georgia Southern University

Teacher Quality Grant – (St. Catherines Sea Turtle Conservation Program), R. Vance, Gale Bishop

R. Kelly Vance

No abstract provided.


Determination Of Chlorofluorocarbon Apparent Ages In Groundwater From The West Side Of The Island Of Hawaii, Jacque Kelly, Craig Glenn 2009 Georgia Southern University

Determination Of Chlorofluorocarbon Apparent Ages In Groundwater From The West Side Of The Island Of Hawaii, Jacque Kelly, Craig Glenn

Jacque L. Kelly

Large quantities of nutrient-enriched groundwater are supplied to coastal west Hawaii via point-sourced and diffuse groundwater seepage sites as submarine groundwater discharge. These inputs are especially important given that they are the only freshwater source to the coastal zone due to the absence of perennial streams. It has been suggested that discharging groundwaters are less than 50 years old; yet, the apparent ages of these groundwaters have not been investigated, despite the copious water volumes discharging to the coastal zone. Apparent age data is crucial to fully understand nutrient transformations along groundwater flow paths and will help constrain groundwater residence ...


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