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oai:ubir.buffalo.edu:10477/793852025-10-01T22:52:01Zcom_10477_77914col_10477_79301

Mapping the Previous Extent of the Medusae Fossae Formation, Mars Dunning, Ian Gregg, Tracy Geology geology planetology geomorphology M.S. The Medusae Fossae Formation (MFF), Mars, is an unconformable deposit that covers ~2.1 × 10^6 km^2 of the Martian surface, stretching discontinuously over 5,000 km between 135°E – 235°E and 10°N – 10°S. The thicknesses of present-day MFF outcrops range from 10 – 10^3 m. MFF is characterized by internal layering and displays abundant yardangs. Terrestrial yardangs are common in ignimbrites, suggesting that the MFF is composed of similarly fine-grained and differentially indurated materials . Outliers of MFF around the continuous outcrops and yardangs are consistent with the interpretation that the MFF previously covered a larger area, but aeolian processes have eroded the MFF to its current extent. Here, we use high-resolution (<25 m/pixel) visible images (primarily Context Camera [CTX] images) to search for and systematically map MFF outliers to constrain the MFF’s previous extent. Deflation rates of ~400 – 600 nm/yr (over the past 2.1 – 3.1 Ga) for the MFF were calculated from these data. 2019-04-04T20:31:13Z 2019-04-04T20:31:13Z 2019 2019-01-10 18:37:45 Text Thesis http://hdl.handle.net/10477/79385 eng Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions. Copyright retained by author. application/pdf State University of New York at Buffalo