Faculty Research

W&L Geology Faculty do research locally and around the world. Every summer several professors have students work on their research.

Chris Connors:
My current research interests are in structural geology, specifically forward and inverse numerical modeling of fault-related folding, seismic interpretation of complex structures, and the development of growth strata associated with fault-related folding. I am a part of the resource assessment of the North Slope of Alaska with the USGS, doing seismic interpretation. I am analyzing the structure of the deep water of several basins in the world using long-offset, prestack depth-migrated seismic data. In addition, I have field projects underway integrating surface and subsurface data in the Appalachians and growth structures in the Catalan Coastal Ranges of Spain. My previous work in the extraction of quantitative information from remote sensing data to constrain structural interpretation and modeling has seen its most recent manifestation in the use of ground-based lidar and structure-from-motion photogrammetry to augment traditional field mapping and field work.

David Harbor:
I research myriad topics within surficial processes. I am working with alum Bill Barnhart '08 at the University of Iowa on the Quarternary history of the Hoshab Fault in southern Pakistan. Using remote sensing of many types, we are exploring the history of offset on a fault that ruptured in an odd way in 2013. Our hypothesis is that one fault moves in different ways (reverse or strike-slip) at different times. This hasn't been documented in subduction zones before. I am also working on the mechanisms that allow rivers, with hydraulic forces alone, to life and erode large bedrock blocks from the river bed. This study involves modeling in flumes as well as fieldwork, including the instrumentation of block that was removed, made "smart" (she will log her position and the pressue above and below), and will be put back in the river before a high flow event. I am also finishing up projects in France, India, and Argentina, as well as continuing my career-long study of the evolution of the Appalachian Mountain topography. 

Margaret Anne Hinkle:
Prof. Hinkle's interests are in aqueous environmental geochemistry, with particular emphasis on researching contaminant and micronutrient fate during iron and manganese biogeochemical cycling. She is currently studying the biomineralization of manganese oxides by fungi associated with metal polluted coal mine drainage remediation sites and the associated impact on contaminant uptake and retention by the fungal manganese oxide minerals relative to abiotic manganese oxide minerals.

Elizabeth Knapp:
Hawaii: Elizabeth's current research is focusing on the Alaka'i Swamp, Kauai. Due to extreme orographic effect, this is one of the wettest places on earth. Groundwater systems that drain basaltic terranes with low relief and high rainfall have the potential to be extremely corrosive (elevated pCO2, low pH and low dissolved oxygen). Her focus is on carbon dioxide consumption by basalt weathering in this intense weathering regime.

Appalachian Critical Zone: Elizabeth is also is collaborating with Penn State as part of the Susquehanna-Shale Hills NSF Critical Zone Observatory. The goal is to develop a climosequence of Silurian Rose Hill shales (at satellite sites) and compare regolith development.

Lisa Greer:
Lisa Greer's current research documents the health, abundance, and history of the endangered coral Acropora cervicornis (Staghorn coral) in the Caribbean. This once dominant Caribbean reef builder is now virtually absent from the vast majority of modern reefs. Over the last several years, Lisa has analyzed the geochemistry of Modern and Holocene specimens of this coral from Barbados, Belize, St. John, Florida, and the Dominican Republic to better understand the conditions under which this species thrives. In recent years her multidisciplinary coral reef work has also included quantifying herbivore populations (urchins, parrotfish, and damselfish), creating a working carbonate budget for her study site, quantifying live coral cover at the species level from satellite imagery and photographic data, genetic characterization of acroporids and their symbiodinium symbionts, using coral branch orientation and morphology to track hydrodynamics, and aging Acropora spp. corals using a new genetic aging technique, radiocarbon data, and high resolution uranium series methods. Lisa is also working on a project to quantify the relative contribution of anthropogenic carbon (the Suess Effect) and terrestrial carbon derived from deforestation to the stable carbon isotope composition of corals from southern Belize.

Jeff Rahl:
Jeff's research interests are in tectonics, geochronology, and structural geology. Recent and ongoing projects include:

Argentina: In collaboration with Professor Harbor, Jeff has investigated the history of uplift and erosional incision into the eastern flank of the Andes in northwestern Argentina, using U-Pb and fission-track detrital geochronology as well as traditional sedimentary provenance tools.

Nevada: With support from the Keck Geology Consortium, Jeff and Allen McGrew (University of Dayton) began a new project in the summer of 2015 to document the structural and thermal evolution of the East Humboldt Range-Wood Hills metamorphic core complex in northeastern Nevada. This work will provide constraints on the timing of crustal extension that are essential to reconstruct the tectonic evolution of the northern Basin and Range province.

Virginia: Jeff has several active research projects in the region near Lexington. In collaboration with John Garver (Union College), Jeff is performing zircon fission-track geochronology using a scanning electron microscope to document the long-term cooling history of the Blue Ridge. Further, Jeff is working to document deformation conditions in mid-crustal shear zones in the Blue Ridge using quartz crystallographic preferred orientations.