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Sedimentology

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Articles 1 - 30 of 1806

Full-Text Articles in Physical Sciences and Mathematics

Branched Oak Lake State Recreation Area Jan 9999

Branched Oak Lake State Recreation Area

Conservation and Survey Division

No abstract provided.


Nebraska Map Of Counties, Conservation Survey Division Jan 9999

Nebraska Map Of Counties, Conservation Survey Division

Conservation and Survey Division

No abstract provided.


Nebraska Natural Resource District Boundaries Jan 9999

Nebraska Natural Resource District Boundaries

Conservation and Survey Division

No abstract provided.


Statewide Precipitation And Discharge Of Platte River Above Ashland, Bryce B. Pease Jan 9999

Statewide Precipitation And Discharge Of Platte River Above Ashland, Bryce B. Pease

Conservation and Survey Division

No abstract provided.


Groundwater Regions In Nebraska Jan 9999

Groundwater Regions In Nebraska

Conservation and Survey Division

No abstract provided.


Nebraska County Map Jan 9999

Nebraska County Map

Conservation and Survey Division

No abstract provided.


Topographic Regions Of Nebraska, G. E. Condra Jan 9999

Topographic Regions Of Nebraska, G. E. Condra

Conservation and Survey Division

No abstract provided.


Generalized Classification Of Economic Minerals Jan 9999

Generalized Classification Of Economic Minerals

Conservation and Survey Division

No abstract provided.


Metric System Vs. Inch-Pound Units Jan 9999

Metric System Vs. Inch-Pound Units

Conservation and Survey Division

No abstract provided.


Precambrian Rock Descriptions From Deep Wells In Nebraska, E. Liedecke Jan 9999

Precambrian Rock Descriptions From Deep Wells In Nebraska, E. Liedecke

Conservation and Survey Division

No abstract provided.


Areas In Nebraska Of Subirrigated Vegetation, John Elder Jan 9999

Areas In Nebraska Of Subirrigated Vegetation, John Elder

Conservation and Survey Division

No abstract provided.


Distribution And Thickness Of Glacial Till In Nebraska. Jan 9999

Distribution And Thickness Of Glacial Till In Nebraska.

Conservation and Survey Division

No abstract provided.


Nebraska Groundwater In Storage, Conservation Survey Division Jan 9999

Nebraska Groundwater In Storage, Conservation Survey Division

Conservation and Survey Division

No abstract provided.


Generalized Soil Map Of Nebraska Jan 9999

Generalized Soil Map Of Nebraska

Conservation and Survey Division

No abstract provided.


Dissolved Solids Sampling Sites And Zones Of Concentration Jan 9999

Dissolved Solids Sampling Sites And Zones Of Concentration

Conservation and Survey Division

No abstract provided.


Transmissivity Of The Principal Aquifer In Nebraska Jan 9999

Transmissivity Of The Principal Aquifer In Nebraska

Conservation and Survey Division

No abstract provided.


Irrigation Water Diagram Jan 9999

Irrigation Water Diagram

Conservation and Survey Division

No abstract provided.


Development Of A Land Cover Characteristics Data Base For The Conterminous U.S., Thomas R. Loveland, James W. Merchant, Donald O. Ohlen, Jesslyn F. Brown Jan 9999

Development Of A Land Cover Characteristics Data Base For The Conterminous U.S., Thomas R. Loveland, James W. Merchant, Donald O. Ohlen, Jesslyn F. Brown

Conservation and Survey Division

No abstract provided.


Holdrege: Nebraska's State Soil Jan 9999

Holdrege: Nebraska's State Soil

Conservation and Survey Division

No abstract provided.


Report Of The Nebraska Conservation And Soil Survey, G. E. Condra Jan 9999

Report Of The Nebraska Conservation And Soil Survey, G. E. Condra

Conservation and Survey Division

No abstract provided.


Nebraska Natural Resources District Boundaries, Nebraska Natural Resources Commission Jan 9999

Nebraska Natural Resources District Boundaries, Nebraska Natural Resources Commission

Conservation and Survey Division

No abstract provided.


Ductile And Brittle Deformation Of Slackwater Deposits In The Tucannon River Valley, Chelsi K. Howard Jun 2021

Ductile And Brittle Deformation Of Slackwater Deposits In The Tucannon River Valley, Chelsi K. Howard

Geosciences Student Work

The Tucannon River valley in eastern Washington is home to a number of ductile and brittle soft-sediment deformation. This project aims to look at ductile deformation by classifying and comparing styles of clastic dikes in the field and to look at brittle deformation by analyzing small faults in localized outcrops. Clastic dikes are sedimentary intrusions into other sedimentary strata. There are three main types of clastic dikes: injection, extrusion, and sugtrusion. In addition, two subcategories of clastic dikes are described as sheeted dikes and fault injection dikes. Ductile and brittle deformation occurs in “slackwater” deposits associated with margins of glacial ...


Deposition And Diagenesis Of The Blossom Sand, Panola County, Texas, Hannah Chambers Jun 2021

Deposition And Diagenesis Of The Blossom Sand, Panola County, Texas, Hannah Chambers

Electronic Theses and Dissertations

The Late Cretaceous Blossom Sand within the Austin Group is a historic gas reservoir in the East Texas basin, located at depths of approximately 2,000 ft below the surface. Since the discovery of the Carthage Field in 1918 in the East Texas Basin, the Blossom Sand has produced approximately 26 BCF of gas with minor amounts of oil. Despite its notoriety in the Carthage Field, there is very little research that has been conducted on this unit, although it crops out in northeast Texas and is found in the subsurface of southwest Arkansas, western Louisiana, and the East Texas ...


Taphonomy Of Late Jurassic (Tithonian) Morrison Formation Apatosaurus Sp. Vertebrae Found Associated With Teeth From Allosaurus Sp. And Ceratosaurus Sp., And Body Size Extrapolation From The Associated Theropod Teeth., Greg C. Agyan May 2021

Taphonomy Of Late Jurassic (Tithonian) Morrison Formation Apatosaurus Sp. Vertebrae Found Associated With Teeth From Allosaurus Sp. And Ceratosaurus Sp., And Body Size Extrapolation From The Associated Theropod Teeth., Greg C. Agyan

All Graduate Plan B and other Reports

An Apatosaurus sp. locality from Dinosaur National Monument designated DNM-15 was excavated in 1985, and associated with two Allosaurus teeth and one Ceratosaurus tooth that were near one of the caudal vertebrae. The Ceratosaurus tooth was buried between an overlying rib and that same caudal vertebra. The caudal vertebrae of the DNM-15 Apatosaurus were intact and articulated, but the anterior skeleton was mostly absent, with a row of articulated sacral vertebrae in close association with a femur. Two other Allosaurus teeth were reported near the preserved ilium of the Apatosaurus, but they could not be located in the collections.

Field ...


Three Centuries Of Vegetation Change In The William & Mary College Woods Reconstructed Using Phytoliths, Timothy Terlizzi May 2021

Three Centuries Of Vegetation Change In The William & Mary College Woods Reconstructed Using Phytoliths, Timothy Terlizzi

Undergraduate Honors Theses

The College Woods, west of William & Mary’s campus, consists of ~900 acres of protected southern mixed hardwood forest. The woods surround Lake Matoaka, a former millpond established in ~1700. Despite the rich history of the area, little is known about how the dominant vegetative landcover has shifted over the last 300 years. This study set out to quantify the modern vegetation within the College Woods via the phytolith assemblages within the soil and identify shifts in the assemblages since the creation of Lake Matoaka and whether these changes are distinct from the vegetation that existed in the area before the lake. To accomplish this, I studied the composition and preservation of phytoliths – silica bodies generated within and between plant cells. The study focused on the two questions: do the modern phytolith assemblages in the soil of the College Woods reflect the vegetation present and can phytoliths within the sediments of Lake Matoaka be used to identify the dominant vegetative communities over the last ~300 years? I addressed these questions with three approaches: 1) Identify the primary phytolith producing taxa within the College Woods; 2) Identify the modern phytolith assemblages within the soil of the College Woods; 3) Identify the differences between phytolith assemblages from the lake sediment core samples. I found the following: 1) The production of phytoliths varies heavily between and within different common taxa of the College Woods, with species of oaks (Quercus spp.) unpredictably producing phytoliths and beeches (Fagus grandifolia) likely contributing the majority of dicot phytoliths; 2) The modern phytolith assemblages of the College Woods reflect a low phytolith producing environment, and the vegetative homogeneity is reflected in the phytolith record; 3) The ...


Microbiological Study In A Gneissic Cave From Sri Lanka, With Special Focus On Potential Antimicrobial Activities, Ethige Isuru P. Silva, Pathmakumara Jayasingha, Saman Senanayake, Anura Dandeniya, Dona Helani Munasinghe Mar 2021

Microbiological Study In A Gneissic Cave From Sri Lanka, With Special Focus On Potential Antimicrobial Activities, Ethige Isuru P. Silva, Pathmakumara Jayasingha, Saman Senanayake, Anura Dandeniya, Dona Helani Munasinghe

International Journal of Speleology

The emergence of antibiotic resistance is a global health crisis, thus the search for novel antimicrobial compounds has become a continuous necessity. Underexplored and extreme environments, such as cave ecosystems, have been identified as a promising potential source for the discovery of novel microorganisms with novel antimicrobial compounds (AMC). This study presents the first cave microbiological investigation in Sri Lanka, with a special preference for bioprospecting of novel AMC. The cave sediment characterization demonstrated the presence of close to strong acidic conditions (pH 3.1 – 3.3) and thus indicates the possibility of isolating acidophilic microorganisms. Eight cave wall/ceiling ...


An Analysis Of Suspended Sediment Dynamics In A Partially Mixed Estuary, Riyadh Hamad Muttaleb Mar 2021

An Analysis Of Suspended Sediment Dynamics In A Partially Mixed Estuary, Riyadh Hamad Muttaleb

Dissertations and Theses

The purpose of this work is to investigate via data analysis and numerical modeling the SPM (suspended particulate matter) dynamics of a heavily contaminated partially urban estuary, the Lower Passaic River estuary (LPR), NJ. Accordingly, I investigate the quantity and mechanics of variation of fine and coarse SPM in the LPR via data analysis. Data analysis focuses on the parameters that affect SPM dynamics at six moored stations occupied during the Fall and Spring seasons, from near the estuary mouth to tidal freshwater. A 3D hydrodynamic model (Delft3D-FM) is used to analyze the effects of estuary topography on the dynamic ...


The Role Of Glaciers In Hydropower Production In Nepal, Shakti P.C., Ishwar Pun, Rocky Talchabhadel, Darshan Kshetri Feb 2021

The Role Of Glaciers In Hydropower Production In Nepal, Shakti P.C., Ishwar Pun, Rocky Talchabhadel, Darshan Kshetri

Journal of Asian Energy Studies

Nepal is a mountainous country rich in water resources, with huge potential for hydropower generation. The Department of Electricity Development (DoED), which sits within the Nepalese Ministry of Energy, has published Guidelines for Study of Hydropower Projects to set out the official standards for the detailed study of hydropower projects in Nepal. The guide is regularly revised, with the latest revision having taken place in 2018, in order to ensure the long-term sustainability of the projects. Among the key issues considered are the linkages between glaciers and hydropower projects in Nepal under a changing environment. The formation of new glacial ...


Nebraska Statewide Groundwater-Level Monitoring Report 2020, Aaron R. Young, Mark E. Burbach, Leslie M. Howard, Sue Olafsen Lackey, Robert Matthew Joeckel Feb 2021

Nebraska Statewide Groundwater-Level Monitoring Report 2020, Aaron R. Young, Mark E. Burbach, Leslie M. Howard, Sue Olafsen Lackey, Robert Matthew Joeckel

Conservation and Survey Division

The term “groundwater” has come to be all but synonymous with Nebraska. Nearly three-quarters of the total volume of the High Plains Aquifer lies beneath the state. Groundwater maintains our streams, our ecosystems, our people, and our vitally important agricultural economy. Nebraska’s total groundwater resource is vast, yet it is also vulnerable to natural and anthropogenic changes, necessitating a long-term commitment to wise management through informed decision-making. Monitoring, studying, and reporting form the essential basis for such management and, ultimately, for meeting the myriad challenges presented by change.


Rapid Mapping Of Landslides In The Western Ghats (India) Triggered By 2018 Extreme Monsoon Rainfall Using A Deep Learning Approach, Sansar Raj Meena, Omid Ghorbanzadeh, Cees J. Van Westen, Thimmaiah Gudiyangada Nachappa, Thomas Blaschke, Ramesh P. Singh, Raju Sarkar Jan 2021

Rapid Mapping Of Landslides In The Western Ghats (India) Triggered By 2018 Extreme Monsoon Rainfall Using A Deep Learning Approach, Sansar Raj Meena, Omid Ghorbanzadeh, Cees J. Van Westen, Thimmaiah Gudiyangada Nachappa, Thomas Blaschke, Ramesh P. Singh, Raju Sarkar

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Rainfall-induced landslide inventories can be compiled using remote sensing and topographical data, gathered using either traditional or semi-automatic supervised methods. In this study, we used the PlanetScope imagery and deep learning convolution neural networks (CNNs) to map the 2018 rainfall-induced landslides in the Kodagu district of Karnataka state in theWestern Ghats of India.We used a fourfold cross-validation (CV) to select the training and testing data to remove any random results of the model. Topographic slope data was used as auxiliary information to increase the performance of the model. The resulting landslide inventory map, created using the slope data with ...