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Articles 121 - 150 of 1152
Full-Text Articles in Earth Sciences
Hornbrook Formation, Oregon And California: A Sedimentary Record Of The Late Cretaceous Sierran Magmatic Flare-Up Event, Kathleen D. Surpless
Hornbrook Formation, Oregon And California: A Sedimentary Record Of The Late Cretaceous Sierran Magmatic Flare-Up Event, Kathleen D. Surpless
Earth and Environmental Geosciences Faculty Research
Early Late Cretaceous time was characterized by a major magmatic flare-up event in the Sierra Nevada batholith and early phases of magmatism in the Idaho batholith, but the sedimentary record of this voluminous magmatism in the U.S. Cordillera is considerably less conspicuous. New detrital zircon U-Pb ages from the Hornbrook Formation in southern Oregon and northern California reveal a significant and sustained influx of 100–85 Ma detrital zircons into the broader Hornbrook region beginning ca. 90 Ma. Detrital zircon ages and hafnium isotopic compositions, combined with whole-rock geochemistry, suggest that sediment was largely derived from the Sierra Nevada, requiring uplift …
Low-Shield Volcanism: A Comparison Of Volcanoes On Syria Planum, Mars And Snake River Plain, Idaho, Amanda Olivia Henderson
Low-Shield Volcanism: A Comparison Of Volcanoes On Syria Planum, Mars And Snake River Plain, Idaho, Amanda Olivia Henderson
Theses and Dissertations
Volcanoes are key indicators of a planet's internal structure, mechanics, and evolutionary history. Consequently, understanding the types and ages of volcanoes on a planet's surface is an important endeavor. In an attempt to better understand the relationship between morphometry and volcanic processes, we compared low-shield volcanoes on Syria Planum, Mars, with basaltic shields of the eastern Snake River Plain. We used 133 volcanoes on Syria Planum that are covered by Mars Orbiting Laser Altimeter (MOLA) and High Resolution Stereo Camera (HRSC) elevation data and 246 eSRP shields covered by the National Elevation Dataset (NED) for this comparison. Shields on Syria …
Patterns Of Anthropogenic Nutrient Contaminants In The Otter Creek Watershed, Madison County, Kentucky, Elijah D. Wolfe, Walter S. Borowski, Jacob L. Robin
Patterns Of Anthropogenic Nutrient Contaminants In The Otter Creek Watershed, Madison County, Kentucky, Elijah D. Wolfe, Walter S. Borowski, Jacob L. Robin
EKU Faculty and Staff Scholarship
We measured nutrient concentrations within the Otter Creek watershed (Madison County, Kentucky) to: (1) discover levels of anthropogenic contaminants affecting the water quality; (2) compare these measurements to a national data set; and (3) identify nutrient sources. The watershed mainly drains rural land characterized by cattle grazing, but also drains the town of Richmond. We sampled throughout the watershed to gain a representative perspective of nutrient levels and specifically targeted localities of suspected anthropogenic nutrient sources. Water samples were passed through a 0.45 mm filter, placed in pre-acidified vials, and measured one to two days after collection. Nutrients – ammonium, …
Genomic And Transcriptomic Evidence For Scavenging Of Diverse Organic Compounds By Widespread Deep-Sea Archaea, Meng Li, Brett J. Baker, Karthik Anantharaman, Sunit Jain, John A. Breier, Gregory J. Dick
Genomic And Transcriptomic Evidence For Scavenging Of Diverse Organic Compounds By Widespread Deep-Sea Archaea, Meng Li, Brett J. Baker, Karthik Anantharaman, Sunit Jain, John A. Breier, Gregory J. Dick
School of Earth, Environmental, & Marine Sciences Faculty Publications
Microbial activity is one of the most important processes to mediate the flux of organic carbon from the ocean surface to the seafloor. However, little is known about the microorganisms that underpin this key step of the global carbon cycle in the deep oceans. Here we present genomic and transcriptomic evidence that five ubiquitous archaeal groups actively use proteins, carbohydrates, fatty acids and lipids as sources of carbon and energy at depths ranging from 800 to 4,950 m in hydrothermal vent plumes and pelagic background seawater across three different ocean basins. Genome-enabled metabolic reconstructions and gene expression patterns show that …
8000 Years Of Environmental Evolution Of Barrier–Lagoon Systems Emplaced In Coastal Embayments (Nw Iberia), Rita González-Villanueva, Marta Pérez-Arlucea, Susana Costas, Roberto Bao, Xose L. Otero, Ronald J. Goble
8000 Years Of Environmental Evolution Of Barrier–Lagoon Systems Emplaced In Coastal Embayments (Nw Iberia), Rita González-Villanueva, Marta Pérez-Arlucea, Susana Costas, Roberto Bao, Xose L. Otero, Ronald J. Goble
Department of Earth and Atmospheric Sciences: Faculty Publications
The rocky and indented coast of NW Iberia is characterized by the presence of highly valuable and vulnerable, small and shallow barrier– lagoon systems structurally controlled. The case study was selected to analyse barrier–lagoon evolution based on detailed sedimentary architecture, chronology, geochemical and biological proxies. The main objective is to test the hypothesis of structural control and the significance at regional scale of any highenergy event recorded. This work is also aimed at identifying general patterns and conceptualizing the formation and evolution of this type of coastal systems. The results allowed us to establish a conceptual model of Holocene evolution …
Pengaruh Dosis Pupuk Fosfor Dan Pupuk Organik Cair Terhadap Pertumbuhan Dan Hasil Kacang Hijau (Vigna Radiata L.) Pada Ultisol Jatinangor, Agus Wahyudin, Tati Nurmala, R. D. Rahmawati
Pengaruh Dosis Pupuk Fosfor Dan Pupuk Organik Cair Terhadap Pertumbuhan Dan Hasil Kacang Hijau (Vigna Radiata L.) Pada Ultisol Jatinangor, Agus Wahyudin, Tati Nurmala, R. D. Rahmawati
Jurnal Kultivasi
Percobaan ini bertujuan untuk mengetahui pengaruh dosis pupuk fosfor dan pupuk organik cair terhadap pertumbuhan dan hasil tanaman kacang hijau (Vigna radiata L.). Percobaan dilaksanakan di kebun percobaan Fakultas Pertanian Universitas Padjadjaran, Jatinangor, Jawa Barat. Rancangan percobaan yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK) dengan sembilan perlakuan dan diulang tiga kali yaitu 50 kg ha-1 pupuk fosfor + O L ha-1 pupuk organik cair, 50 kg ha-1 pupuk fosfor + 4 L ha-1 pupuk organik cair, 50 kg ha-1 pupuk fosfor + 8 L ha-1 pupuk organik cair, 75 kg ha-1 pupuk fosfor + O L ha-1 …
Impact Of Natural Organic Matter On Particle Behavior And Phototoxicity Of Titanium Dioxide Nanoparticles, Shibin Li, Hongbo Ma, Lindsay K. Wallis, Matthew A. Etterson, Benjamin Riley, Dale J. Hoff, Stephen A. Diamond
Impact Of Natural Organic Matter On Particle Behavior And Phototoxicity Of Titanium Dioxide Nanoparticles, Shibin Li, Hongbo Ma, Lindsay K. Wallis, Matthew A. Etterson, Benjamin Riley, Dale J. Hoff, Stephen A. Diamond
United States Environmental Protection Agency: Publications
Due to their inherent phototoxicity and inevitable environmental release, titanium dioxide nanoparticles (nano- TiO2) are increasingly studied in the field of aquatic toxicology. One of the particular interests is the interactions between nano-TiO2 and natural organic matter (NOM). In this study, a series of experiments was conducted to study the impacts of Suwannee River natural organic matter (SRNOM) on phototoxicity and particle behaviors of nano-TiO2. For Daphnia magna, after the addition of 5 mg/L SRNOM, LC50 value decreased significantly from 1.03 (0.89–1.20) mg/L to 0.26 (0.22–0.31) mg/L. For zebrafish larvae, phototoxic LC50 values were …
Changes In Litter Quality Caused By Simulated Nitrogen Deposition Reinforce The N-Induced Suppression Of Litter Decay, Linda T. A. Van Diepen, Serita D. Frey, Christopher M. Sthultz, Eric W. Morrison, Rakesh Minocha, Anne Pringle
Changes In Litter Quality Caused By Simulated Nitrogen Deposition Reinforce The N-Induced Suppression Of Litter Decay, Linda T. A. Van Diepen, Serita D. Frey, Christopher M. Sthultz, Eric W. Morrison, Rakesh Minocha, Anne Pringle
Faculty Publications
Rates of nitrogen (N) deposition are increasing in industrialized and rapidly developing nations. Simulated N deposition suppresses plant litter decay rates, in particular for low quality (high lignin) litter. Litter quality is a primary driver of litter decomposition; however, it is not clear how changes in litter quality caused by long-term ecosystem exposure to chronic N additions interact with altered soil N-availability to influence litter decay dynamics. To document the effects of simulated N deposition on litter quality, we conducted a meta-analysis of available litter nutrient data from simulated N deposition experiments in temperate forests. To directly test whether changes …
U.S. Drought Monitor, October 27, 2015, Brad Rippey
U.S. Drought Monitor, October 27, 2015, Brad Rippey
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for October 27, 2015 (10/27/15) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
A Bat-Guano-Derived Δ15N And Δ13C Record Of Paleoenvironmental Change: Zidită Cave, Romania, Daniel Martin Cleary
A Bat-Guano-Derived Δ15N And Δ13C Record Of Paleoenvironmental Change: Zidită Cave, Romania, Daniel Martin Cleary
USF Tampa Graduate Theses and Dissertations
Because nitrogen isotopes are fractionated along the soil-plant-insect-bat-guano pathway, it may be possible to reconstruct environmental and climatic changes reflected in the nitrogen isotopic composition of guano. A 1.5-m core of bat guano from Zidită Cave (western Romania) provides a record of climatic and anthropogenic influence on the regional nitrogen cycle and paleoenvironmental controls on nitrogen transforming processes. Increasing and decreasing trends of nitrogen isotopic composition (δ15N values) correspond well with changes in the influence of farming practices, deforestation, and forest expansion. These influences likely had a significant effect on the openness of the nitrogen cycle, resulting in …
Hydrothermal Speleogenesis In Carbonates And Metasomatic Silicites Induced By Subvolcanic Intrusions: A Case Study From The Štiavnické Vrchy Mountains, Slovakia, Pavel Bella, Ľudovít Gaál, Vladimír Šucha, Peter Koděra, Rastislav Milovský
Hydrothermal Speleogenesis In Carbonates And Metasomatic Silicites Induced By Subvolcanic Intrusions: A Case Study From The Štiavnické Vrchy Mountains, Slovakia, Pavel Bella, Ľudovít Gaál, Vladimír Šucha, Peter Koděra, Rastislav Milovský
International Journal of Speleology
Several caves of hydrothermal origin in crystalline limestones and metasomatic silicites were investigated in the central zone of the Štiavnica stratovolcano, Štiavnické vrchy Mountains, central Slovakia. Evidence of hydrothermal origin includes irregular spherical cave morphology sculptured by ascending thermal water, occurrence of large calcite crystals and hydrothermal alteration of host rocks, including hydrothermal clays. The early phases of speleogenesis in the crystalline limestone near Sklené Teplice Spa were caused by post-magmatic dissolution linked either to the emplacement of subvolcanic granodiorite intrusions during Late Badenian time or to the spatially associated Late Sarmatian epithermal system. Speleogenesis in metasomatic silicites in the …
Informing The Design And Deployment Of Health Information Technology To Improve Care Coordination, Diego A. Martinez
Informing The Design And Deployment Of Health Information Technology To Improve Care Coordination, Diego A. Martinez
USF Tampa Graduate Theses and Dissertations
In the United States, the health care sector is 20 years behind in the use of information technology to improve the process of health care delivery as compared to other sectors. Patients have to deliver their data over and over again to every health professional they see. Most health care facilities act as data repositories with limited capabilities of data analysis or data exchange. A remaining challenge is, how do we encourage the use of IT in the health care sector that will improve care coordination, save lives, make patients more involved in decision-making, and save money for the American …
Characteristics Of Sediment Transport At Selected Sites Along The Missouri River, 2011–12, David L. Rus, Joel M. Galloway, Jason S. Alexander
Characteristics Of Sediment Transport At Selected Sites Along The Missouri River, 2011–12, David L. Rus, Joel M. Galloway, Jason S. Alexander
United States Geological Survey: Water Reports and Publications
Extreme flooding in the Missouri River in 2011, followed by a year of more typical streamflows in 2012, allowed the sediment-transport regime to be compared between the unprecedented conditions of 2011 and the year immediately following the flooding. As part of a cooperative effort between the United States Geological Survey (USGS) and the United States Army Corps of Engineers, this report follows up USGS Scientific Investigations Report 2013–5006 by comparing sediment transport between years and among sampling sites spanning the Garrison Segment in North Dakota, the Gavins Point Segment downstream from Lewis and Clark Lake, and a part of the …
The Vulnerability Of Indo-Pacific Mangrove Forests To Sea-Level Rise, Catherine E. Lovelock, Donald R. Cahoon, Daniel A. Friess, Glenn R. Guntenspergen, Ken W. Krauss, Ruth Reef, Kerrylee Rogers, Megan L. Saunders, Frida Sidik, Andrew Swales, Neil Saintilan, Le Xuan Thuyen, Tran Triet
The Vulnerability Of Indo-Pacific Mangrove Forests To Sea-Level Rise, Catherine E. Lovelock, Donald R. Cahoon, Daniel A. Friess, Glenn R. Guntenspergen, Ken W. Krauss, Ruth Reef, Kerrylee Rogers, Megan L. Saunders, Frida Sidik, Andrew Swales, Neil Saintilan, Le Xuan Thuyen, Tran Triet
United States Geological Survey: Staff Publications
Sea-level rise can threaten the long-term sustainability of coastal communities and valuable ecosystems such as coral reefs, salt marshes and mangroves1,2. Mangrove forests have the capacity to keep pace with sea-level rise and to avoid inundation through vertical accretion of sediments, which allows them to maintain wetland soil elevations suitable for plant growth3. The Indo- Pacific region holds most of the world’s mangrove forests4, but sediment delivery in this region is declining, owing to anthropogenic activities such as damming of rivers5. This decline is of particular concern because the Indo-Pacific region is …
U.S. Drought Monitor, October 20, 2015, Brad Rippey
U.S. Drought Monitor, October 20, 2015, Brad Rippey
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for October 20, 2015 (10/20/15) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
A Modern Gate For Ezells Cave, Texas, Jim "Crash" Kennedy
A Modern Gate For Ezells Cave, Texas, Jim "Crash" Kennedy
National Cave and Karst Management Symposia
No abstract provided.
Cave Diving As A Resource For Cave Management, Mark Wenner
Cave Diving As A Resource For Cave Management, Mark Wenner
National Cave and Karst Management Symposia
No abstract provided.
Microgravity Methods- The National Corvette Museum, Bowling Green, Ky, Ric Fredrico, Brian Ham
Microgravity Methods- The National Corvette Museum, Bowling Green, Ky, Ric Fredrico, Brian Ham
National Cave and Karst Management Symposia
No abstract provided.
Analyzing Possible Influences In Karst Regions Contributing To Harmful Algal Bloom Occurrences In Freshwater Lakes, Robert Schaefer, Jason Polk, Keegan Mcclanahan
Analyzing Possible Influences In Karst Regions Contributing To Harmful Algal Bloom Occurrences In Freshwater Lakes, Robert Schaefer, Jason Polk, Keegan Mcclanahan
National Cave and Karst Management Symposia
No abstract provided.
Cave Management And Restoration Efforts At Coronado National Memorial, Hereford, Az, Jessica M. Garcia, Stephanie Kangas, Ryan Janway, Tess Wagner
Cave Management And Restoration Efforts At Coronado National Memorial, Hereford, Az, Jessica M. Garcia, Stephanie Kangas, Ryan Janway, Tess Wagner
National Cave and Karst Management Symposia
No abstract provided.
Missouri Cave Database, Scott House
Missouri Cave Database, Scott House
National Cave and Karst Management Symposia
No abstract provided.
Origin Of Jewel Cave And How It Supports Cave Management Decisions, Mike Wiles
Origin Of Jewel Cave And How It Supports Cave Management Decisions, Mike Wiles
National Cave and Karst Management Symposia
No abstract provided.
Cave Research Projects Help Promote Diversity In The Geosciences, De'etra Young, Shannon Trimboli, Thomas Bly
Cave Research Projects Help Promote Diversity In The Geosciences, De'etra Young, Shannon Trimboli, Thomas Bly
National Cave and Karst Management Symposia
No abstract provided.
Cavemonitor: Monitoring Show Cave In Romania, Silviu Constantin, Cavemonitor Team
Cavemonitor: Monitoring Show Cave In Romania, Silviu Constantin, Cavemonitor Team
National Cave and Karst Management Symposia
No abstract provided.
National Forest Cave And Karst Management Plans- The Need To Include "How To" Wording., Ray Keeler
National Forest Cave And Karst Management Plans- The Need To Include "How To" Wording., Ray Keeler
National Cave and Karst Management Symposia
No abstract provided.
Karst And Coastal Development: A Digital Cave Survey Tool For Municipal And Tourism Planning In Quintana Roo, Mexico, James G. Coke Iv, Simon Richards
Karst And Coastal Development: A Digital Cave Survey Tool For Municipal And Tourism Planning In Quintana Roo, Mexico, James G. Coke Iv, Simon Richards
National Cave and Karst Management Symposia
No abstract provided.
Can Monitoring Of Microorganisms From Show Caves Be Used In Human Impact Assessment?, Oana Teodora Moldovan, Silviu Bercea, Ruxandra Nastase-Bucur
Can Monitoring Of Microorganisms From Show Caves Be Used In Human Impact Assessment?, Oana Teodora Moldovan, Silviu Bercea, Ruxandra Nastase-Bucur
National Cave and Karst Management Symposia
No abstract provided.
How Cavers Became Allies Instead Of Adversaries At Mammoth Cave National Park, Rick Olson
How Cavers Became Allies Instead Of Adversaries At Mammoth Cave National Park, Rick Olson
National Cave and Karst Management Symposia
No abstract provided.
Contaminant Mapping And Refugia: Hidden River Cave, Kentucky, Chris Smart, Caren Raedts
Contaminant Mapping And Refugia: Hidden River Cave, Kentucky, Chris Smart, Caren Raedts
National Cave and Karst Management Symposia
No abstract provided.
An Investigation Of Groundwater Flow In The Vicinity Of Patoka Dam, Indiana: Assessment Research To Support United States Army Corps Of Engineers Dam Safety Risk, Lee Anne Bledsoe, Chris Groves, Kenneth Henn, Jackie Row
An Investigation Of Groundwater Flow In The Vicinity Of Patoka Dam, Indiana: Assessment Research To Support United States Army Corps Of Engineers Dam Safety Risk, Lee Anne Bledsoe, Chris Groves, Kenneth Henn, Jackie Row
National Cave and Karst Management Symposia
No abstract provided.