|Remote sensing; surface processes; geomorphology; sedimentology; reflectance spectroscopy; martian surface geology; planetary science.|
|– Marine and planetary geophysical imaging at nested resolutions and ground truth through drilling, coring, logging, and sampling.|
– Tectonic processes, tectonic-climate interactions, and geohazards of convergent margins and transitional tectonic environments.
– Role of catastrophism in the geologic record including impact cratering, hurricanes, and tectonic events.
– Planetary habitability, impact ...
|Dr. Helper is a field geologist, a generalist whose interests span igneous and metamorphic petrology, structural geology, tectonics, mineralogy and planetary field geology. His current research explores geochemical and isotopic similarities of Proterozoic and Archean crust in East Antarctica and the southwestern U.S., the Precambrian geology of Texas, and ...|
|Process geomorphology, feedbacks between channel morphology and hydrology and sediment transport, landscape sensitivity to climate and lithology, bedrock river erosion, flash floods, arroyo erosion, canyon formation, environmental monitoring and sensor networks, laboratory flume experimentation, numerical modeling, tsunami sediment transport and deposition.|
|Earth's origin and evolution, isotope and trace element geochemistry, the role of crust and lithospheric mantle recycling in the generation of mantle chemical heterogeneity, the origin and distribution of water and other volatile elements in the Earth's interior, and the thermal and chemical evolution of the Earth's core and core/...|
|Vertebrate paleontology, evolution and development of the vertebrate skeleton, phylogenetic systematics, the early history of mammals and their extinct relatives among Synapsida, the history of birds and their extinct relatives among Dinosauria, the history of other amniotes, high-resolution X-ray computed tomography, CT scanner, DigiMorph, informatics|
|X-Ray computed tomography, X-ray physics, Tomography reconstruction, Digital morphology, CT data visualization, Volumetric data analysis, Digital educational resources|
|carbonaceous chondrites, planetary geology, remote sensing, VISNIR and TIR spectroscopy, X-ray computed tomography (CT), electron backscatter diffraction (EBSD), 3D image analysis and processing, scientific software development|
|Ductile deformation; petrology; machine learning; SEM; EBSD; EPMA; EDS; field geology & structural geology|
|Cave and karst exploration - Speleothem and karst trace element chemistry - Speleothem and karst stable and radiogenic isotopes - Paleoclimate and paleohydrology reconstructions - Environmental chemistry - Design of electromechanical field instrumentation - Cave monitoring and calibration of proxies to modern conditions - Fledgeling tree-ring dendrochronologist - Aquifers - ...|