Graduate Students
| Name | Office | Phone | Advisor | |
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![]() Terra Anderson |
LAP 334 | 414-229-4794 | tna@uwm.edu | Dyanna Czeck |
Thesis Research: I plan to document quartz deformation fabrics across a quantified strain gradient during transpressional deformation. Quartz fabrics are widely studied in the field and lab, but previous studies have not been able to track fabric development in rocks that have deformed under natural strain rates and where strain may be quantified. I will document quartzite fabrics in rocks where finite strains have been measured in deformed conglomerate clasts, and develop a link between strain and crystallographic and grain shape orientations. The work will look at both quartzite clasts and quartz veins, which will cover the whole strain history and a later portion of the strain history, respectively. I am working in the Seine Metaconglomerates located in the Rainy Lake region in northwestern Ontario. The area has a wide variability of measured strain, which will allow me to document the evolution of quartz fabrics with increasing deformation. In order to examine quartz fabrics, I will use Electron Backscatter Diffraction (EBSD) analyses on polished thin sections. In doing so, crystallographic orientation, grain shape, and grain shape orientation will be documented across the strain gradient. By documenting the fabric evolution with strain, I will be able to consider whether the fabric forms in a smooth progression, in spurts, or once a critical threshold of strain is reached. The strain within the conglomerate has been measured using standard Rf/Phi method by Fissler (2006). In the first phase of this project, the strain that she measured will be used to gauge the fabric evolution. The Rf/Phi method is the standard strain analysis technique, but is best used when there is no competence contrast between the clasts and matrix. This assumption is rarely valid in deformed conglomerates, so one additional aspect of my research will be to calculate the strain using a modified Rf/Phi technique proposed by Lisle (1983) that accounts for competence contrast. |
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![]() Thomas Bellile |
LAP 332 | 414-229-3952 | tbellile@uwm.edu | John Isbell |
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![]() Quintin Bendixen |
LAP 330 | 414-229- | qdb@uwm.edu | John Isbell |
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![]() Kristina Betzold |
LAP 336 | 414-229-2819 | kbetzold@uwm.edu | Doug Cherkauer |
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![]() Bonnie Bills |
LAP 242 | 414-229-6463 | bjbills@uwm.edu | Doug Cherkauer |
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![]() Joanna Bredlowska |
LAP 350 | 414-229-1153 | bredlow2@uwm.edu | Tim Grundl |
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![]() Jeff Bruesewitz |
LAP 332 | 414-229-3952 | bruesew3@uwm.edu | Barry Cameron |
Thesis Research: My Thesis involves the Cary Mound granite, a pluton approximately 10 km south of Marshfield Wisconsin. The pluton was shallowly emplaced and may represent a caldera that was formed at or near the end of the Penokean Orogeny. Major and trace element analysis will be conducted to determine the tectonic setting of emplacement as well as to relate a geographically associated rhyolite to the granite. Oxygen isotope analysis may be performed to establish conduit pathways of hydrothermal meteoric water. Magnetic susceptibility orientations will also be obtained to determine the amount of deformation.
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![]() Carrie Czech |
LAP 242 | 414-229-6463 | ccheck@uwm.edu |
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![]() Tanya Gregg |
LAP 332 | 414-229-3952 | tgregg@uwm.edu | Barry Cameron |
Thesis Research: Chemical variation between lava flows and scoria deposits in cinder cones is an untested idea. While some investigations have collected multiple samples from a single cone, no study has analyzed the chemical variations throughout the evolution of a cinder cone. There are two main stages in the life cycle of a cinder cone, the early explosive stage composed of pyroclastic scoria deposits and the later effusive stage consisting of lava flows. Each stage can be examined geochemically to determine the composition of their mantle source. Although stratovolcanoes in Guatemala are related to subduction of the Cocos plate beneath the Caribbean plate, cinder cones in southeastern Guatemala cluster in an extensional graben. The primary purpose of the study is to determine detailed variations in the geochemistry of Guatemalan cinder cones throughout their lifespans and distinguish the explosive-effusive transition in a basaltic magmatic system.
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![]() Lindsey Henry |
LAP 350 | 414-229-1153 | christi9@uwm.edu | John Isbell Margaret Fraiser |
Thesis Research: My thesis project focuses on the Agua de Jagüel formation within the Calingasta-Uspallata basin in northwest Argentina. The stratigraphy of the formation exhibits the transition from glacial to post-glacial conditions for the second of three glacial successions over Gondwana during the late Paleozoic Gondwanan ice age. For my field work, I will gather information to determine the style and dynamics of the glacial environment, as well as the nature of the change from a glacial to a post-glacial setting. Such research will help to decipher the climatic history of the region and provide an understanding of how the glaciation in Argentina correlates with the overall glaciation of Gondwana.
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![]() Micah Holzbauer |
LAP 240 | 414-229-2772 | holzbau2@uwm.edu | Tim Grundl |
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![]() Kim Johnson |
LAP 334 | 414-229-4794 | johns587@uwm.edu | Dyanna Czeck |
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![]() Tristan Kloss |
LAP 369 | 414-229-6630 | tjkloss@uwm.edu | Stephen Dornbos |
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![]() Dawn Knipe |
LAP 334 | 414-229-4794 | dlknipe@uwm.edu | |
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![]() Zelenda Koch |
LAP 330 | 414-229-3328 | zjkoch@uwm.edu | John Isbell |
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![]() Kyle Noll |
LAP 336 | 414-229-2819 | kylenoll@uwm.edu | Barry Cameron |
Thesis Research: I will be looking at a cinder cone field in Guatemala. I will be applying GIS, Remote Sensing, & Ar/Ar age dating to hopefully get a better understanding of the temporal & spatial phenomenon of a cinder cone field. Ultimately, hopefully a researcher will be able to apply a general classification system to cinder cone field of interest. |
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![]() Alexis Porubcan |
LAP 240 | 414-229-2772 | porubcan@uwm.edu | Shangping Xu |
![]() Jeanne Ramponi |
LAP 334 | 414-229-4794 | ramponij@uwm.edu | Doug Cherkauer |
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![]() Mark Schlottke |
LAP 332 | 414-229-3952 | mts5@uwm.edu | Stephen Dornbos |
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![]() Jake Walczak |
LAP 332 | 414-229-3952 | jwalczak@uwm.edu | Shangping Xu |
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![]() Rachel Wilberding |
LAP 358 | 414-229-3746 | rachelw6@uwm.edu | Doug Cherkauer |
Thesis Research: As part of a regional research project to determine potential alternative water sources for Southeastern Wisconsin, my research is focused on the feasibility of utilizing treated wastewater from Waukesha and its surrounding communities to enhance recharge to the shallow aquifer system. To this end, surveys of historic major ion chemistry in the Dolomite aquifer and the Sand and Gravel aquifer have been performed to analyze for existing geochemical trends. Geochemical modeling will be performed in order to assess the impact, if any, on these systems with the introduction of treated wastewater. |
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![]() Michael Wright |
LAP 334 | 414-229-4794 | wrightm@uwm.edu | Doug Cherkauer |
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