Geology Commons^™

4500-Year Paleohurricane Record From The Western Gulf Of Mexico, Coastal Central Tx, Usa, Sarah B. Monica, Davin J. Wallace, Elizabeth J. Wallace, Xiaojing Du, Sylvia G. Dee, John B. Anderson

OES Faculty Publications

Texas receives the second-highest number of tropical cyclone (TC) landfalls per year in the United States. At present, long-term TC projections from climate models remain uncertain due to the short and biased nature of Atlantic TC observations. Sediment archives of past storms can help extend the observational record of TC strikes over the past few millennia. When a TC makes landfall along the central Texas coast, coastal downwelling channels and storm currents transport and deposit coarse sediment to a zone of rapid accumulation along the shelf, known as the Texas Mud Blanket (TMB). This “backwash” process results in expansive storm …

Ice-Marginal Volcanic Sequence In Iceland Found On A Nondescript Gradual Hillslope: An Unexpected Record Of Ice Thickness Late In Deglaciation, Audrey R. Putnam, Kristen L. Siebach, Candice C. Bedford, Sarah L. Simpson, Michael T. Thorpe, Joseph J. Tamborski

OES Faculty Publications

Volcanism increases when glaciers melt because isostatic rebound during deglaciation decreases the pressure on the mantle, which enhances decompression melting. Anthropogenic climate change is now causing ice sheets and valley glaciers to melt around the world and this deglaciation could stimulate volcanic activity and associated hazards in Iceland, Antarctica, Alaska, and Patagonia. However, current model predictions for volcanic activity associated with anthropogenic deglaciation in Iceland are poorly constrained, in part due to uncertainties in past volcanic output over time compared to ice sheet arrangements. Further work specifically characterizing glaciovolcanic and ice-marginal volcanoes in Iceland is needed to reconstruct volcanic output …

Geomorphological Evolution Of The Mun River, Surin Province Northeastern Thailand, Chutiwat Sawangkit

Chulalongkorn University Theses and Dissertations (Chula ETD)

From 1973 to 2023, the Mun River in Surin Province, Thailand, underwent geomorphological evolution. This study examines changes in channel parameters to determine how human activity and natural processes affect river shape. This study measures changes in four important geomorphological parameters channel sinuosity, radius of curvature, channel width, and channel length by analyzing the data from C (ERT), satellite imagery, and topographic maps. A dynamic meandering process that has created oxbow lakes, neck and chute cut-offs, and other geomorphological features throughout time is visible on satellite photos. Significant morphological changes have been brought about, notably, by the building of dams, …

144, Scott Brande

All 3D Rock Models

Model 144 - obsidian - igneous rock

SketchFab link: https://sketchfab.com/3d-models/144-a362edff33d84ca2b108ef7dc304d745

154, Scott Brande

All 3D Rock Models

Model 154 - rhyolite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/154-3330c3ddf80540698ca7ded58e958ae7

146, Scott Brande

All 3D Rock Models

Model 146 - basalt - igneous rock

SketchFab link: https://sketchfab.com/3d-models/146-23207ef5c9784bb2b851ee15988f3461

141, Scott Brande

All 3D Rock Models

Model 141 - andesite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/141-58cce95336f8483893eb258c3289dba4

158, Scott Brande

All 3D Rock Models

Model 158 - andesite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/158-3a7d68066dae42f1b23a4adef32fcb28

143, Scott Brande

All 3D Rock Models

Model 143 - obsidian - igneous rock

SketchFab link: https://sketchfab.com/3d-models/143-6b5d9bd327a443e6a2b43087361c4e00

145, Scott Brande

All 3D Rock Models

Model 145 - basalt - igneous rock

SketchFab link: https://sketchfab.com/3d-models/145-aeea05a5c3524b1e880b14b5ca1e72ca

138, Scott Brande

All 3D Rock Models

Model 138 - rhyolite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/138-ff74c3cfe9b84efcbdd17a4d2f16e539

140, Scott Brande

All 3D Rock Models

Model 140 - andesite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/140-70d3697070254896a783d1e3696e55bd

Cataloguing Minerals, Part Two: Re-Imagining Mineral Catalogue Descriptions To Address Colonial Legacies, Carrie Robbins, Selby Hearth, Marianne Weldon, Aha Anderson, Rosa Bieber-Stanley, April Chernila, Helen Christ, Hannah Cosgrove, Morgan Hanson-Rosenberg, Carly Hill, Maya Hofstetter, Emily Lazo, Izzie Ludlow, Samantha Lyster, Rachel Myers, Jasper Nash, Georgia Reed, Julia Saint- Amour

Geology Faculty Research and Scholarship

Minerals are uniquely tied to colonialism, labour, and environment; however, those relationships have traditionally not been described in mineral catalogues – an omission that limits curators’ ability to account for mineral histories. This paper re-imagines mineral cataloguing practices to restore historical, cultural, and environmental contexts that were stripped away. We describe the roles of citations; linked data; provenience and provenance histories; non-standardized and ‘unapproved’ nomenclatures; positionality; and the need to label archival silences. We examine the risks and practical limitations that arise in attempting to turn this colonial tool against itself. In discussing these issues, we contribute to ongoing dialogues …

Accretion Of Warm Chondrules In Weakly Metamorphosed Ordinary Chondrites And Their Subsequent Reprocessing, Alexander M. Ruzicka, Richard C. Hugo, Jon M. Friedrich, Michael Tyler Ream

Geology Faculty Datasets

To better understand chondrite accretion and subsequent processes, the textures, crystallography, deformation, and compositions of some chondrite constituents in ten lithologies of different cluster texture strength were studied in seven weakly metamorphosed (Type 3) and variably shocked ordinary chondrites (Ragland—LL3 S1, Tieschitz—H/L3 S1, NWA 5421—LL3 S2, NWA 5205—LL3 S2, NWA 11905—LL3-5 S3, NWA 5781—LL3 S3, NWA 11351—LL3-6 S4) using optical and electron microscopy and microtomography techniques. Results support a four-stage model for chondrite formation. This includes 1) limited annealing following collisions during chondrule crystallization and rapid cooling in space prior to accretion, as evidenced by olivine microstructures consistent with dislocation …

Geographically Dependent Thermodynamic And Geochemical Evolution In The Post-Batholith Upper Mantle Beneath The Sierra Nevada: Analysis Of The Blue Knob Xenoliths, Eleanor Ruos

Scripps Senior Theses

Xenoliths entrained in recent (Miocene) volcanics from the Sierra Nevada provide insights into a continuously evolving upper mantle during post-batholith generation periods (early Cenozoic–present). Hypothesized mantle refertilization followed by subsequent delamination of the lithospheric root beneath the Sierra provides a contextual framework for analyzing how the upper mantle responds to such events. This study contributes new geochemical data from the ultramafic xenoliths of Blue Knob, including bulk-rock major and trace element data, thin-section petrography, mineral chemistry and thermobarometry, and oxygen isotopes (delta¹⁸O). Blue knob (Eastern Sierra) data are compared to previous works on xenoliths from Chinese Peak and …

Maximizing Mining Operations: Unlocking The Crucial Role Of Intelligent Fleet Management Systems In Surface Mining’S Value Chain, Arman Hazrathosseini, Ali Moradi Afrapoli

Earth and Environmental Sciences Faculty Publications

On the one side, the operational expenses of mining enterprises are showing an upward trend; and on the other side, conventional mining fleet management systems (FMSs) are falling short in addressing the high-dimensionality, stochasticity, and autonomy needed in increasingly complex operations. These major drivers for change have convinced researchers to search for alternatives including artificial-intelligence-enabled algorithms recommended by Mining 4.0. The present study endeavors to scrutinize this transition from a business management point of view. In other words, a literature review is carried out to gain insight into the evolutionary trajectory of mining FMSs and the need for intelligent algorithms. …

The Influence Of Volcano Edifice Resonance On The Seismic Triggering Of Thermal Activity At Active Volcanoes, Morgana M. Wilke

Dissertations, Master's Theses and Master's Reports

There is an established correlation between large earthquakes and volcanic unrest, however the mechanisms between this connection are not well understood. Relatively small changes in stress within a volcanic system could be enough to initiate a response. One aspect that could serve to amplify small dynamic stress changes is volcanic edifice resonance triggered by surface waves at resonant frequency. In this paper, we investigate the relationship between thermal activity of volcanoes and various minimum thresholds of Love wave amplitudes at resonance caused by teleseismic earthquakes above a 7.0 M. Satellite-derived thermal data from 25 volcanoes are modeled in relation to …

256, Scott Brande

All 3D Rock Models

Model 256 - hornfels - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/256-c6781bb84f044acc84989bcb1ec0b50d

176, Scott Brande

All 3D Rock Models

Model 176 - conglomerate - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/176-993a14f63e414fa1bcee56234e60b89c

180, Scott Brande

All 3D Rock Models

Model 180 - micrite - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/180-e2e6e4d8e7844d3dbf15adeb675c9ab6

160, Scott Brande

All 3D Rock Models

Model 160 - bituminous coal - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/160-f524c1fc4f4143788ed7a54df53dcb15

165, Scott Brande

All 3D Rock Models

Model 165 - breccia - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/165-897cabd121db4d14b4d0b0bceb290996

187, Scott Brande

All 3D Rock Models

Model 187 - sandstone - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/187-1aa42c020f23482dab7d3cdab30cb724

201, Scott Brande

All 3D Rock Models

Model 201 - amphibolite - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/201-de1057ce02cf4133bfcb5c6ce83da6df

224, Scott Brande

All 3D Rock Models

Model 224 - phyllite - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/224-064f45645a2242d29ef75046eeb503ac

Migrating Whooping Crane Activity Near U.S. Air Force Bases And Airfields In Oklahoma, David A. Brandt, Aaron T. Pearse, Mark T. Bidwell, John Conkin, Matthew Butler

United States Geological Survey: Publications

The Aransas-Wood Buffalo population of Grus americana (Linnaeus, 1758; whooping cranes) migrates through the United States Great Plains, encountering places substantially altered by human activity. Using telemetry data from 2017 to 2022, we investigated whooping crane migration behavior around U.S. Air Force bases in Oklahoma. Our study focused on potential collision risks between whooping cranes and aircraft, a substantial concern for aviation safety. We determined that activity was greatest at Kegelman Air Force Auxiliary Airfield, near whooping crane critical habitat. On average, 61 percent of marked whooping cranes used locations west of Kegelman Air Force Auxiliary Airfield and Vance Air …

Leveraging High Resolution Classifications And Random Forests For Hindcasting Decades Of Mesic Ecosystem Dynamics In The Landsat Time Series, N. E. Kolarik, Nawaraj Shrestha, T. Caughlin, J. S. Brandt

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Nebraska Statewide Groundwater-Level Monitoring Report 2023, Aaron R. Young, Mark E. Burbach, Sue Olafsen Lackey, Robert Matthew Joeckel, Nawaraj Shrestha, Jeffrey Westrop

Conservation and Survey Division: Faculty and Staff Publications

This report is a synthesis of groundwater-level monitoring programs in Nebraska. It is a continuation of the series of annual reports and maps produced by the Conservation and Survey Division (CSD) of the University of Nebraska in cooperation with the U.S. Geological Survey (USGS) since the 1950s. Groundwater-level monitoring began in Nebraska in 1930 to survey the state’s groundwater resources and observe changes in its availability on a regular basis. The CSD and USGS cooperatively developed, maintained, and operated an observation-well network throughout the state. These two agencies were responsible for collecting and archiving this information, and for making it …

Transient Electromagnetic (Tem) Survey For Targeted Drilling On The Kurtzhals Property, Cedar County, Nebraska, Jesse Korus, Katherine (Katie) Cameron, Michele Waszgis

Conservation and Survey Division: Faculty and Staff Publications

The Kurtzhals property is in Section 19, Township 30N, Range 3 in Cedar County, Nebraska. The present land use is agricultural row crop, but past use included hog production. Two active irrigation wells are located on adjacent properties to the west and southwest. An irrigation well was installed in the northwest corner of the property in 2022. Due to the low yield (300 gallons per minute) of this well, Mr. Kurtzhals seeks to install an additional irrigation well to supplement the first. Several unsuccessful test holes had been drilled prior to the present survey. The purpose of this survey was …

Zircon Luminescence Dating Re-Visited, C. Schmidt, T. Halter, P.R. Hanson, A. Ulianov, B. Putlitz, G. E. King, S. Kreutzer

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.