Abbreviated Journal Title
Geophys. Res. Lett.
MARS; Geosciences, Multidisciplinary
We investigated regional variations in the onset diameter of craters displaying a single layer ejecta morphology within +/- 30 degrees latitude using Viking imagery. Our results generally agree with those of previous studies which show onset diameters of 5 to 6 km in the equatorial region, but we have identified localized regions with unusually small onset diameters. The largest region is located in Solis and Thaumasia Planae. The 3-5 km onset diameter range in this area indicates a near-surface ice-rich reservoir (depth similar to 110 m). This unusual concentration of near-surface ice may have resulted from magmatic-driven uplifts associated with the Tharsis rise, which modified parts of a regional aquifer/drainage basin system and resulted in the transfer and concentration of subsurface volatiles in this region.
Geophysical Research Letters
Barlow, Nadine G.; Koroshetz, John; and Dohm, James M., "Variations in the onset diameter for Martian layered ejecta morphologies and their implications for subsurface volatile reservoirs" (2001). Faculty Bibliography 2000s. 2918.