Possible hummocky cross-stratification Latitude/longitude: 24.35 North, 340.69 East

1. Possible hummocky cross-stratification Latitude/longitude: 24.35 North, 340.69 East Rationale & Morphology: Possible hummocky cross-stratification overlain by flat-lying sediments. The hummocks may represent distal offshore deposits that may concentrate organic matter. It is not possible to see finer structures from orbit, even with HiRISE (maximum resolution of ~30 cm), but the rover would be able to look for internal structure and verify that the hummocks are real hummocky cross-stratification, and could investigate the contact and the apparently planar layers above to look for evidence of higher flow or deeper water. What will the rover specifically do here? MastCam will allow the rover to take higher-resolution shots of the entire outcrop. These will provide images similar in resolution to those available to earthbound field geologists, which will mean the ability to recognize outcrop-scale sedimentary features. The Alpha Particle X-Ray Spectrometer (APXS) will simultaneously keep track of the broad phase transitions in the outcrop so that the rover can more precisely correlate sedimentological changes with mineralogical ones.

2. PSP_004052_2045