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Articles 751 - 780 of 2251
Full-Text Articles in Earth Sciences
Constraints On Crystallization Conditions From Pseudosection Thermobarometry Of The New World Mining District Porphyries Near Cooke City, Montana, Jacob Jared Gordon
Constraints On Crystallization Conditions From Pseudosection Thermobarometry Of The New World Mining District Porphyries Near Cooke City, Montana, Jacob Jared Gordon
Earth Sciences Undergraduate Senior Theses
The New World Mining District (NWMD), located two miles northeast of Cooke City, Montana, is host to a series of epithermal sills, dikes, and plutons, the intrusion of which is responsible for significant Au-Ag-Cu mineralization. These intrusive bodies were emplaced in the Eocene, potentially contemporaneously with the Heart Mountain Detachment - Earth’s largest subaerial landslide, and have been proposed as a potential trigger for the event. The pre-emplacement crys- tallization conditions for the porphyritic dikes in the region, however, remain unknown and have previously been limited to surface observations. Constraining the magmatic conditions of the in- trusives in the region …
Identifying Active Layer Dynamics Across Geomorphic Landforms In Longyeardalen, Central Svalbard, Madeline Kim Koelbel
Identifying Active Layer Dynamics Across Geomorphic Landforms In Longyeardalen, Central Svalbard, Madeline Kim Koelbel
Earth Sciences Undergraduate Senior Theses
The thermal state of the active layer and analysis of meteorological conditions provides a greater understanding of where active layer detachment slides can occur. This study provides an overview of the active layer ground thermal regime for 2024 and 2025 in Longyeardalen, Svalbard, where the largest settlement in Svalbard, Longyearbyen is located. Ground temperature data was extracted from 8 boreholes in Longyeardalen and meteorological data was extracted from one weather station in central Longyeardalen. Overall, the ALT thickness and the thawing period increased from 2024 to 2025 while the thaw rate remained the same or decreased. The zero-curtain effect was …
Comparison Of Fish Biomass And Fish Carbon Content Associated With Reef Sites At The Rio Grande Valley Artificial Reef In The Gulf Of Mexico, Allison K. White, Md Saydur Rahman, Richard J. Kline
Comparison Of Fish Biomass And Fish Carbon Content Associated With Reef Sites At The Rio Grande Valley Artificial Reef In The Gulf Of Mexico, Allison K. White, Md Saydur Rahman, Richard J. Kline
School of Earth, Environmental, & Marine Sciences Faculty Publications
As global fisheries stocks have decreased due to overfishing and climate change, artificial reefs have gained significant attention. In addition to providing or restoring habitat, artificial reefs may serve as carbon capture sinks and potential climate mitigation strategies. The Rio Grande Valley (RGV) Reef is an artificial reef located in the northwestern Gulf of Mexico off the coast of Texas. The RGV Reef area spans 1,650 acres and is comprised of hundreds of groupings of recycled and pre-formed materials ranging from low relief (1–2 ft) to high relief (8–30 ft) reef structures. This reef provides a variety of novel habitat …
Investigating The Distribution And Origin Of Pitted Mounds On Mars Using Machine Learning-Based Mapping And Integrated Geological Analysis: Application To Isidis Planitia, Precious Batubo
Doctoral Dissertations
Pitted mounds are widespread landforms across the northern plains of Mars, yet their origin remains uncertain. These features have been interpreted as possible expressions of subsurface fluid activity, including sedimentary volcanism, magmatic processes, or other fluid-assisted mechanisms. Determining their distribution, morphology, and geology is therefore important for understanding the evolution of subsurface hydrological processes and the planet’s potential for habitability. However, the large spatial extent of mound-bearing terrains makes comprehensive manual mapping impractical. This dissertation presents an automated approach to mound detection using Faster Region-Based Convolutional Neural Network (Faster R-CNN) from high-resolution Context Camera (CTX) images including morphometric and mineralogical …
Mgrre_Thinsections_Mgrre-147_7, Mgrre
Mgrre_Thinsections_Mgrre-147_2, Mgrre
Mgrre_Thinsections_Mgrre-147_8, Mgrre
Mgrre_Thinsections_Mgrre-147_3, Mgrre
Mgrre_Thinsections_Mgrre-147_1, Mgrre
Mgrre_Thinsections_Mgrre-147_9, Mgrre
Mgrre_Thinsections_Mgrre-147_10, Mgrre
Stratigraphic Distribution Of Pleistocene Aves At Fossil Lake In Lake County, Oregon, Cole Bradley Phillips
Stratigraphic Distribution Of Pleistocene Aves At Fossil Lake In Lake County, Oregon, Cole Bradley Phillips
Masters Theses
The Fossil Lake locality in south-central Oregon is rich in many species of fossil remains and is also home to packages of sandstone that grade upward into finer siltstone or claystone. These packages have been interpreted to represent rising and falling lake levels as a result of glacial transgressive and regressive sequences. The fossil vertebrates and invertebrates have also fluctuated because of the different climates at Fossil Lake. Although the stratigraphic distribution of most classes of animals have been determined, fossil birds have not. Here, the distribution of 329 avian fossils is presented in the stratigraphic framework. The species were …
Mgrre_Thinsections_Mgrre-147_24, Mgrre
Mgrre_Thinsections_Mgrre-147_23, Mgrre
Mgrre_Thinsections_Mgrre-147_25, Mgrre
Mgrre_Thinsections_Mgrre-101_6, Mgrre
Mgrre_Thinsections_Mgrre-101_20, Mgrre
Mgrre_Thinsections_Mgrre-101_22, Mgrre
Mgrre_Thinsections_Mgrre-101_24, Mgrre
Mgrre_Thinsections_Mgrre-101_20, Mgrre
Mgrre_Thinsections_Mgrre-102_1, Mgrre
Mgrre_Thinsections_Mgrre-101_3, Mgrre
Mgrre_Thinsections_Mgrre-101_4, Mgrre
Mgrre_Thinsections_Mgrre-101_5, Mgrre
Mgrre_Thinsections_Mgrre-101_7, Mgrre
Mgrre_Thinsections_Mgrre-101_9, Mgrre
Mgrre_Thinsections_Mgrre-101_10, Mgrre
Mgrre_Thinsections_Mgrre-101_14, Mgrre