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Phosphorus Source--Sink Relationships Of Stream Sediments In The Rathbun Lake Watershed In Southern Iowa, Usa, Najphak Hongthanat, John L. Kovar, Michael L. Thompson, James R. Russell, Thomas M. Isenhart 2018 Iowa State University

Phosphorus Source--Sink Relationships Of Stream Sediments In The Rathbun Lake Watershed In Southern Iowa, Usa, Najphak Hongthanat, John L. Kovar, Michael L. Thompson, James R. Russell, Thomas M. Isenhart

Thomas M. Isenhart

The surface waters of Rathbun Lake watershed in southern Iowa are impacted by agricultural sources of sediments and nutrients, including phosphorus (P). Because stream sediments often play an important role in regulating P concentrations in stream water, we investigated sediment-water column P relationships in four creeks within the watershed and then evaluated the relationship between sediment properties and indicators of the risk of P loss. Based on Mehlich-3-extractable P (17 to 68 mg kg -1) and degree of P saturation (2 to 12 %), stream bank and bed sediments at the four sites were unlikely to serve as major sources of ...


A Survey To Better Understand The Use Of The Terms “Colluvium” And “Alluvium”, Bradley A. Miller, Jérôme Juilleret 2018 Iowa State University

A Survey To Better Understand The Use Of The Terms “Colluvium” And “Alluvium”, Bradley A. Miller, Jérôme Juilleret

Bradley A. Miller

We need your help to fully understand how scientists from different backgrounds define the terms “colluvium” and “alluvium.” We ask that you contribute your perspective by taking the survey at http://goo.gl/forms/fV8RBWKjis. The closing deadline is October 31, 2016. The feedback so far has been positive, and many participants have described the experience as fun. Many commented on how the survey challenged their thinking about these sediments, causing them to more carefully consider potential gaps in their definitions for the terms and their strategies for identifying the materials. Others have expressed great interest in the results because ...


Mineralogical Analysis Of Aeolian Dune Deposits, White River Badlands, South Dakota, Megan O'Connor, Paul Baldauf 2017 Nova Southeastern University

Mineralogical Analysis Of Aeolian Dune Deposits, White River Badlands, South Dakota, Megan O'Connor, Paul Baldauf

Paul Baldauf

The goal of this study is to test our hypothesis that sand dunes in the White River Badlands (WRB), South Dakota, northern Great Plains, formed during one or more prolonged prehistoric droughts. WRB dune fields are located on tabletops north of the White River in southwestern South Dakota. These parabolic dunes have maximum relief of 30 m and open to the northwest, consistent with the dominant wind direction for the region. Currently, dunes are stabilized by a drought-adapted, mixed grass prairie community.

Sand dunes form when 1) prolonged drought kills prairie vegetation, allowing wind to erode and transport sediment, forming ...


Aquifers Of Nebraska Ii: The Niobrara Aquifer, Dana Divine, Robert Matthew Joeckel, Sue Olafsen Lackey 2017 University of Nebraska - Lincoln

Aquifers Of Nebraska Ii: The Niobrara Aquifer, Dana Divine, Robert Matthew Joeckel, Sue Olafsen Lackey

Conservation and Survey Division

The marine shale, chalk, marl, and chalky limestone of the Niobrara Formation directly underlie Quaternary sediments in 23 counties from south-central to northeastern Nebraska. Nevertheless, the formation serves as an aquifer only in and around Cedar, Madison, and Nuckolls counties. Niobrara aquifer wells mostly supply irrigation, domestic, and livestock needs. Two hundred of the approximately 230 active registered wells in Nebraska that are screened entirely in the Niobrara aquifer are in Cedar County and environs. About another 200 wells in this area are screened in both the Niobrara aquifer and overlying Quaternary sediments. Wells screened entirely in the Niobrara aquifer ...


Geophysical Delineation Of Megaporosity And Fluid Migration Pathways For Geohazard Characterization Within The Delaware Basin, Culberson County, Texas, Jonathan David Woodard 2017 Stephen F. Austin State University

Geophysical Delineation Of Megaporosity And Fluid Migration Pathways For Geohazard Characterization Within The Delaware Basin, Culberson County, Texas, Jonathan David Woodard

Electronic Theses and Dissertations

ABSTRACT

Differential dissolution of gypsum karst within the Delaware Basin poses a significant threat to infrastructure that society depends on. The study area is located in Culberson County, Texas and traverses a distance of approximately 54 kilometers along RM 652 within the Gypsum Plain which is situated on the northern margin of the Chihuahua Desert and includes outcrops of Castile and Rustler strata that host karst geohazards. Regions of karst geohazard potential have been physically surveyed proximal to the study area in evaporites throughout the Castile Formation outcrop; minimal hazards, in comparison to the Castile Formation, have been documented in ...


Understanding Cigarette Butt Littering Behavior On A Public Beach: A Case Study Of Jekyll Island, Maranda R. Miller, Mark E. Burbach 2017 University of Nebraska at Lincoln

Understanding Cigarette Butt Littering Behavior On A Public Beach: A Case Study Of Jekyll Island, Maranda R. Miller, Mark E. Burbach

Conservation and Survey Division

Conservation of natural resources and promotion of family-friendly tourism activities are vital to Jekyll Island. As it is stated in the Jekyll Island Authority (JIA) Master Plan “Jekyll Island is a unique, state-owned barrier island that balances conserving and preserving natural, historic, and cultural resources with providing accessible, affordable recreation, vacation, and education opportunities for the people of Georgia and beyond” (Jekyll Island Authority, 2014b, p. 4). The JIA has reported approximately 1 million people visit the island annually (Jekyll Island Authority, 2015). As such, tourism is instrumental to Jekyll Island’s economy, and that tourism contributes to the overall ...


Paleozoic Sandstones In The Tri-State Region, Southern Ozarks: Tectono-Stratigraphic Sequence Development And Compositional Evolution, The Source And Delivery Conundrum, And The Regional Tectonic History, Elvis Chekwube Bello 2017 University of Arkansas, Fayetteville

Paleozoic Sandstones In The Tri-State Region, Southern Ozarks: Tectono-Stratigraphic Sequence Development And Compositional Evolution, The Source And Delivery Conundrum, And The Regional Tectonic History, Elvis Chekwube Bello

Theses and Dissertations

The Paleozoic stratigraphic record of the Ozark Region, southern midcontinent has been divided into at least 33 formations, with the most significant thickness of 9692 feet preserved in northwest Arkansas. The potential thickness would have been much greater, but epeirogenic movements and sea-level rise and fall produced regional surfaces of erosion reducing the record. That interplay between tectonics (epeirogenic movements) and eustatic change (transgressive-regressive cycles) preserved in the Ozark sedimentary history provides the basis for recognition of five distinct, but related, tectonostratigraphic units designated TS 1 through TS 5: Late Precambrian-Middle Cambrian (TS 1), Late Cambrian-Earliest Ordovician (TS 2), Early ...


The Sequence Stratigraphic Context Of Mixed Basin Margin Evaporites In The Harrisburg Member Of The Permian Kaibab Formation, Northern Arizona And Southern Utah, Cole Hendrickson 2017 Stephen F. Austin State University

The Sequence Stratigraphic Context Of Mixed Basin Margin Evaporites In The Harrisburg Member Of The Permian Kaibab Formation, Northern Arizona And Southern Utah, Cole Hendrickson

Electronic Theses and Dissertations

The Kaibab Formation is a mixed carbonate system including evaporites and siliciclastics deposited on a westward dipping epeiric carbonate ramp during the middle Permian in northern Arizona, southern Utah, and eastern Nevada. It consists of the Fossil Mountain Member deposited in open-marine conditions and the overlying Harrisburg Member deposited in restricted conditions. The Harrisburg Member includes facies and depositional environments ranging from open-marine shallow-subtidal wackestone - packstone, restricted subtidal dolomitic mudstone, dolomitic sandstone, peritidal oolitic grainstone as well as gypsum and red siltstones deposited in a sabkha environment.

Fourteen stratigraphic sections were measured across northern Arizona and southern Utah to analyze ...


Raritan Formation (Upper Cretaceous), Long Island, New York: Sedimentological And Geochemical Assessment, Nazrul I. Khandaker, Arif Sikder, Stanley Schleifer, Xin-Chen Liu, Carlos E. Castano Londano, Joseph B. McGee Turner 2017 CUNY York College

Raritan Formation (Upper Cretaceous), Long Island, New York: Sedimentological And Geochemical Assessment, Nazrul I. Khandaker, Arif Sikder, Stanley Schleifer, Xin-Chen Liu, Carlos E. Castano Londano, Joseph B. Mcgee Turner

Publications and Research

The lithology of the Upper Cretaceous Raritan Formation (RF) consists of two members: an upper clay member (Raritan clay) and a lower unit, the Lloyd Sand Member. RF is unconformably overlain by upper Pleistocene glacial deposits. The RF consists of stratified white, light- to dark-gray, and red beds and lenses of clay, silt, and sand; lignite and pyrite are common. Variegated, thin to thickly-bedded Lloyd sandstone (LS) is considered to be one of the extensive regional aquifers in Long Island and interpreted to be nearshore, fluvio-deltaic deposit. Proximity to fluvial axes and active deltaic lobes plays an important role in ...


Geology Of Northeastern Nebraska And Environs: Cedar, Dakota, And Dixon Counties In Nebraska, And Plymouth And Woodbury County In Iowa, Robert Matthew Joeckel, Dana Divine, P.R. Hanson, Leslie M. Howard 2017 University of Nebraska - Lincoln

Geology Of Northeastern Nebraska And Environs: Cedar, Dakota, And Dixon Counties In Nebraska, And Plymouth And Woodbury County In Iowa, Robert Matthew Joeckel, Dana Divine, P.R. Hanson, Leslie M. Howard

Conservation and Survey Division

No abstract provided.


Reply To Nott: Assessing Biases In Speleothem Records Of Flood Events, Rhawn F. Denniston, Gabriele Villarini, Angelique N. Gonzales, Victor J. Polyak, Caroline C. Ummenhofer, Matthew S. Lachniet, Alan D. Wanamaker, William F. Humphreys, David Woods, John Cugley 2017 Cornell College

Reply To Nott: Assessing Biases In Speleothem Records Of Flood Events, Rhawn F. Denniston, Gabriele Villarini, Angelique N. Gonzales, Victor J. Polyak, Caroline C. Ummenhofer, Matthew S. Lachniet, Alan D. Wanamaker, William F. Humphreys, David Woods, John Cugley

Alan Wanamaker

No abstract provided.


Allostratigraphy, Paleogeographic Evolution And Accommodation Controls Of The Lower Colorado Allogroup In West-Central Alberta, Canada (Western Canada Foreland Basin), Steve Morrow 2017 The University of Western Ontario

Allostratigraphy, Paleogeographic Evolution And Accommodation Controls Of The Lower Colorado Allogroup In West-Central Alberta, Canada (Western Canada Foreland Basin), Steve Morrow

Electronic Thesis and Dissertation Repository

The Lower Colorado allogroup of the Western Canada Foreland Basin is a mud-dominated rock succession of marine, estuarine, and coastal plain depositional origin. Relative sea-level oscillations produced bounding discontinuities that allow the allogroup to be divided into four alloformations: the Joli Fou, Viking, Westgate, and Fish Scales.

Rocks of the Lower Colorado allogroup within the study area record marine depositional environments represented by 9 facies. The facies represent depositional environments ranging from offshore marine to lower shoreface through to upper shoreface and river mouth environments.

Geometric analysis of the isopach maps of the regional allomembers of the Lower Colorado allogroup ...


Anthropogenic Infilling Of A Bermudian Sinkhole And Its Impact On Sedimentation And Benthic Foraminifera In The Adjacent Anchialine Cave Environment, Jacquelyn N. Cresswell, Peter J. van Hengstum, Thomas M. Iliffe, Bruce E. Williams, Gil Nolan 2017 Texas A&M University at Galveston

Anthropogenic Infilling Of A Bermudian Sinkhole And Its Impact On Sedimentation And Benthic Foraminifera In The Adjacent Anchialine Cave Environment, Jacquelyn N. Cresswell, Peter J. Van Hengstum, Thomas M. Iliffe, Bruce E. Williams, Gil Nolan

International Journal of Speleology

In the mid-20th century, an inland brackish pond from Bermuda, known as Eve’s Pond, was filled with marine sediment from an adjacent coastal lagoon. At this time, an eyewitness reported “…sediment billowing out of the Green Bay Cave for days…”, which is a marine-dominated anchialine cave located proximal to the former location of Eve’s Pond (~200 m). The purpose of this study was to evaluate the potential impact of this infilling event on cave sedimentation and benthic meiofaunal communities, as proxied by the unicellular protists foraminifera that remain preserved in the sediment record. Eight sediment cores were ...


Holdrege: Nebraska's State Soil, University of Nebraska - Lincoln 2017 University of Nebraska - Lincoln

Holdrege: Nebraska's State Soil, University Of Nebraska - Lincoln

Conservation and Survey Division

No abstract provided.


Holdrege Nebraska State Soil, Nebraska Society of Professional Soil Scientists 2017 Nebraska Society of Professional Soil Scientists

Holdrege Nebraska State Soil, Nebraska Society Of Professional Soil Scientists

Conservation and Survey Division

No abstract provided.


Geology And Paleontology Along Part Of The Niobrara River In Northern Nebraska, Robert Matthew Joeckel, S. T. Tucker, Leslie M. Howard 2017 University of Nebraska - Lincoln

Geology And Paleontology Along Part Of The Niobrara River In Northern Nebraska, Robert Matthew Joeckel, S. T. Tucker, Leslie M. Howard

Conservation and Survey Division

No abstract provided.


Using Stable Isotope Geochemistry To Determine Changing Paleohydrology And Diagenetic Alteration In The Late Cretaceous Kaiparowits Formation, Ut Usa, Daigo Yamamura 2017 University of Arkansas, Fayetteville

Using Stable Isotope Geochemistry To Determine Changing Paleohydrology And Diagenetic Alteration In The Late Cretaceous Kaiparowits Formation, Ut Usa, Daigo Yamamura

Theses and Dissertations

The Western Interior Basin of the North America preserves one of the best sedimentary and paleontological records of the Cretaceous in the world. The Upper Cretaceous Kaiparowits Formation is a rapidly deposited fluvial sequence and preserves one of the most complete terrestrial fossil record of the North America. Such a unique deposit provides an opportunity to investigate the interaction between the physical environment and ecology. In an effort to decipher such interaction, stable isotope composition of cements in sedimentary rocks, concretions and vertebrate fossils were analyzed.

Despite the difference in facies and sedimentary architecture, the isotope composition does not change ...


Stratigraphy, Petrology, And Paleontology Of The Late Cretaceous Campanian Mesaverde Group In Northeastern Utah, Christopher Ward 2017 Utah State University

Stratigraphy, Petrology, And Paleontology Of The Late Cretaceous Campanian Mesaverde Group In Northeastern Utah, Christopher Ward

All Graduate Plan B and other Reports

This project examines a poorly studied sandstone ridge called Snake John Reef located 22 miles southeast of Vernal, in northeastern Utah. Previously this ridge was mapped as exposures of late Cretaceous, undifferentiated Mesaverde Group, and recently unidentified dinosaur fossils have been found along the ridge by the Utah Field House of Natural History State Park Museum. Stratigraphic sections, petrographic thin sections, and collection and study of fossils from Snake John Reef were undertaken to understand the stratigraphic relationship as well as to reconstruct the depositional environment of the dinosaur bearing units. Snake John Reef represents exposures of three late Cretaceous ...


Quantifying Riverbed Sediment Using Recreational-Grade Side Scan Sonar, Daniel Hamill 2017 Utah State University

Quantifying Riverbed Sediment Using Recreational-Grade Side Scan Sonar, Daniel Hamill

All Graduate Theses and Dissertations

The size and organization of bed material, bed texture, is a fundamental attribute of channels and is one component of the physical habitat of aquatic ecosystems. Multiple discipline-specific definitions of texture exist and there is not a universally accepted metric(s) to quantify the spectrum of possible bed textures found in aquatic environments. Moreover, metrics to describe texture are strictly statistical. Recreational-grade side scan sonar systems now offer the possibility of imaging submerged riverbed sediment at resolutions potentially sufficient to identify subtle changes in bed texture with minimal cost,expertise in sonar, or logistical effort. However, inferring riverbed sediment from ...


Stratigraphic Architecture And Lithofacies Of High-Frequency Deltaic Sequences: Virtual Outcrop Analysis Of The Upper Cretaceous (Turonian) Ferron Sandstone Member Of The Mancos Shale, South-Central Utah, Usa, Conor J. Horton 2017 University of Nebraska-Lincoln

Stratigraphic Architecture And Lithofacies Of High-Frequency Deltaic Sequences: Virtual Outcrop Analysis Of The Upper Cretaceous (Turonian) Ferron Sandstone Member Of The Mancos Shale, South-Central Utah, Usa, Conor J. Horton

Dissertations & Theses in Earth and Atmospheric Sciences

Sequence stratigraphic models for low-accommodation settings are not well-formulated and lack documented examples illustrating lithofacies stratal stacking pattern complexities. Presented herein is a detailed stratigraphic analysis of the Upper Cretaceous (Turonian) Ferron Sandstone Member of the Mancos Shale Formation; a fluvial-deltaic succession that primarily accumulated under forced-regressive, falling stage systems tracts during decreasing accommodation. The small (4 km2) study area is located at the connecting point of a 67 km long, depositional strike-oriented and a 30 km long, depositional-dip transect within the western-limb of the Henry Mountains Syncline. Detailed outcrop sections and digital Light Detection and Ranging (LiDAR) derived Virtual ...


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