Morphology and morphometry of double layered ejecta craters on Mars
Double layered ejecta (DLE) craters on Mars display two distinct layers of ejecta that appear to have been ‘fluidized’ during the emplacement process. Volatile content within the subsurface is generally recognized as the main variable aiding ‘flow’ of ejecta layers. On Mars, volatile concentrations are highest near the poles and decrease equatorward. Knowing this, one would expect ejecta to travel further at higher latitudes as compared to lower latitudes. My research focuses on ejecta mobility (EM) of DLEs and how this varies globally with respect to latitude. In addition, I am studying the effect target material (e.g., impact into basalt vs sediment) has on EM.
Conference Presentations & Abstracts
Schwegman R. D., Osinski G. R., Jones E., and Tornabene L. L. (2014) Assessing the Morphology of Double Layered Ejecta Craters at Equatorial Regions on Mars [abstract #2385]. 45th Lunar and Planetary Science Conference. The Woodlands, TX, March 2014.
Schwegman R. D. and Bourke M. C. (2013) Analysis of Rock Breakdown Features at Gusev Crater, Mars [abstract #3086]. 44th Lunar and Planetary Science Conference. The Woodlands, TX, March 2013.
Schwegman, R. D., Osinski, G. R., and Tornabene, L. L. (2014) A Comparison of the Morphometry of Double Layered Ejecta Craters in Different Volcanic Regions on Mars [abstract #1046]. 8th International Conference on Mars. Pasadena, CA, July 2014.
Oklahoma State University
Stillwater OK, USA