• Unlocking the secrets of slow slip in Cascadia using low-frequency earthquakes 

  Sweet, Justin

  Recent discoveries in subduction zones worldwide--including here in Cascadia--have illuminated the once shrouded process of plate convergence below the seismogenic zone. Early geodetic [Dragert, et al., 2001] and seismic ...
• Early evolution of environments and metabolism: insights from nitrogen, selenium and sulfur isotopes 

  Stueeken, Eva Elisabeth

  The evolution of planet Earth and its biosphere are tightly linked through global biogeochemical cycles, and this dissertation seeks to explore this linkage during the Precambrian with new strategies and geochemical ...
• Nutrients, Productivity, and Redox Conditions during Greenhouse Extinctions in the Panthalassic Ocean 

  Schoepfer, Shane DeGennaro

  This study aims to better understand the series of events leading up to and following the Permian-Triassic mass extinction as it took place in the Panthalassic Ocean basin, with a particular focus on the oceanographic ...
• Physical Abrasion of Mafic Minerals and Basalt Grains: Application to Martian Aeolian Deposits 

  Cornwall, Carin

  Sediment maturity, or the mineralogical and physical characterization of sediment deposits, has been used to locate of sediment source, transport medium and distance, weathering processes, and paleoenvironments on Earth. ...
• The persistence of rapid exhumation in the eastern Himalayan syntaxis 

  Lang, Karl

  At the eastern margin of the Indian-Eurasian plate collision, margin-normal plate convergence transitions to dextral strike-slip motion, warping tectonic units southward to form the eastern Himalayan syntaxis. Large southeast ...
• Source, propagation, and effects of lightning in the Earth-ionosphere system 

  Hutchins, Michael Lawrence

  The capabilities of the World Wide Lightning Location Network (WWLLN) are expanded to enable research of the source, propagation, and effects of lightning in the Earth-ionosphere system. The main expansion of the network ...
• Greenland outlet glacier behavior during the 21st century: Understanding velocities and environmental factors 

  Moon, Twila Alexandra

  Outlet glacier ice dynamics, including ice-flow speed, play a key role in determining Greenland Ice Sheet mass loss, which is a significant contributor to global sea-level rise. Mass loss from the Greenland Ice Sheet ...
• Utilizing Changes in Repeating Earthquakes to Monitor Evolving Processes and Structure Before and During Volcanic Eruptions 

  Hotovec-Ellis, Alicia Jean

  Repeating earthquakes are two or more earthquakes that share the same source location and source mechanism, which results in the earthquakes having highly similar waveforms when recorded at a seismic instrument. Repeating ...
• Relationships between climate and geophysical processes: what climate histories can be inferred from glaciers, lakes, and ice streams? 

  Huybers, Kathleen Marie

  This dissertation aims to characterize the present and future variability of the Earth's climate by putting it in the context of past variations in climate. Herein I explore how the spatial and temporal fluctuations of ...
• Testing thermal viscous remanent magnetization (TVRM) as a tool to date geomorphic events 

  Globokar, Danika Monas

  When a rock forms, it acquires a thermal remanent magnetization (TRM) aligned with Earth's magnetic field. If the rock becomes misaligned with the magnetic field (by e.g. rockfall or glacial plucking and deposition), it ...
• Stable Isotopes in Unstable Times: A geochemical investigation of the end Cretaceous mass extinction 

  Tobin, Thomas Steven

  This primary goal of this dissertation is to increase understanding of the end Cretaceous (or Cretaceous - Paleogene or K-Pg) mass extinction through the use of light stable isotope geochemistry. These studies attempt to ...
• Physical Abrasion of Mafic Minerals and Basalt Grains: Application to Martian Aeolian Deposits 

  Cornwall, Carin

  Sediment maturity, or the mineralogical and physical characterization of sediment deposits, has been used to locate of sediment source, transport medium and distance, weathering processes, and paleoenvironments on Earth. ...
• Investigating the effects of <italic>Bacillus subtilis</italic> endospore surface reactivity on low-temperature aqueous geochemical systems 

  Harrold, Zoe R.

  Microbes are a ubiquitous component in water-rock systems including ground and surface waters, soils, mid-ocean ridge hydrothermal systems, and deep sedimentary basins. Microbial envelopes provide complex organic surfaces ...
• The persistence of rapid exhumation in the eastern Himalayan syntaxis 

  Lang, Karl

  At the eastern margin of the Indian-Eurasian plate collision, margin-normal plate convergence transitions to dextral strike-slip motion, warping tectonic units southward to form the eastern Himalayan syntaxis. Large southeast ...
• On the origin of Umtanum Ridge: kinematics of Neogene slip 

  Miller, Brendan A. (2014-04-30)

  Constraining the geometry of active faults is an important step in determining accurate estimates of regional seismic hazard. Where subsurface data are lacking, the shape of hanging wall folds can be used to interpret fault ...
• Ancient playa in Glenelg Region, Gale Crater, Mars: evidence derived from the polygonal flagstone network in mudstone imaged by Curiosity 

  Stewart, Gary Wayne (2014-02-24)

  Polygonal patterned surfaces (PPS) are common on Mars, and found in the Glenelg region of Gale Crater that was extensively studied with the Curiosity rover in the first 200 sols of the Mars Science Laboratory (MSL) mission. ...
• Airborne-radar and ice-core observations of snow accumulation in West Antarctica 

  Medley, Brooke (2014-02-24)

  The world's ice sheets store enough water to raise global eustatic sea level by several tens of meters, and therefore, any fluctuations in their size will cause sea level to rise or fall. The net mass exchanged with the ...
• The Paleocene Eocene Thermal Maximum in the Hanna Basin, WY: Constraints from Organic Carbon Isotopes and Palynological Data 

  Pew, Caroline Rose (2014-02-24)

  The P-E boundary, approximately 56 Ma, coincides with a global climatic event, the Paleocene-Eocene Thermal Maximum (PETM). The PETM is believed to have resulted from a 2-8 fold increase in atmospheric pCO2 in less than ...
• Investigating the interior of West Antarctica with light, radar, and electrical conductance 

  Fudge, Tyler Jeffrey (2014-02-24)

  Ice sheets play an important role in both the modern climate and in past variations of Earth's history. Our understanding of ice sheets has been limited by few observations until recent advances in technology, notably air ...
• Hillslope erosion and weathering rates in Earth's most rapidly uplifting mountains 

  Larsen, Isaac James (2014-02-24)

  Knowledge of hillslope erosion rates and processes is necessary for understanding landscape response to tectonic and climatic forcing and for determining the degree to which mountains regulate biogeochemical cycles and ...

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