USING LIBS TO UNDERSTAND THE ROLE OF COLD EVAPORTIES AND ICE-MINERAL MIXTURES ON THE MARTIAN SURFACEGULLIES APPEAR TO BE EVIDENCE FOR THE RECENT ACTIVITY OF WATER ON THE MARTIAN SURFACE. REGIONS CONTAINING THESE FEATURES MAY THUS POSE A PLANETARY PROTECTION HAZARD FOR THE MARS SCIENCE LABORATORY (MSL) ROVER. HOWEVER DIFFERENT MECHANISMS OF GULLY FORMATION MAY POSE DIFFERING AMOUNTS OF HAZARD TO MSL. DEPOSITIONAL AND EROSIONAL FEATURES OBSERVED WITH SOME GULLIES SHOW EVIDENCE FOR THEIR CREATION BY DEBRIS FLOW SUGGESTING A SHALLOW SUBSURFACE SOURCE OF WATER. DEBRIS FLOWS LIKELY POSE A LOWER HAZARD THAN GULLIED FORMED BY FLUVIAL PROCESSES. THE DEBRIS FLOW HYPOTHESIS MAY BE TESTED BY EXAMINING THE RELATIONSHIP BETWEEN CONTRIBUTING AREA AND SLOPE IN REGIONS WITH GULLIES USING IMAGES AND DIGITAL ELEVATION MODELS (OEMS) FROM THE HIGH RESOLUTION IMAGING SCIENCE EXPERIMENT (HIRISE) INSTRUMENT ONBOARD THE MARS RECONNAISSANCE ORBITER (MRO). IF MSL ENCOUNTERS A GULLY THAT WAS NOT OBSERVED FROM ORBIT IT MAY BE STUDIED SAFELY USING THE ONBOARD REMOTE SENSING CHEMCAMINSTRUMENTS. WE PROPOSE TO CALIBRATE CHEMCAM FOR MATERIALS EXPECTED TO BE IN GULLIES IF THEY FORMED BY WATER WITH A FOCUS ON EVAPORITE MINERALS AND ICE-MINERAL MIXTURES. THIS CALIBRATION WILL ALSO BE USEFUL FOR ANALYZING MINERALS IN OTHER DEPOSITIONAL ENVIRONMENTS WITHIN THE MSL LANDING SITES. JSC PROPOSAL ABSTRACT (2): LASER-INDUCED BREAKDOWN SPECTROSCOPY (LIBS) IS AN EMISSION SPECTROSCOPY TECHNIQUE USED TO DETERMINE THE ELEMENTAL COMPOSITION OF A TARGET MATERIAL. THE CHEMCAM INSTRUMENT SELECTED FOR THE MARS SCIENCE LABORATORY (MSL) ROVER INCLUDES A REMOTE LIBS INSTRUMENT. LIBS IS SENSITIVE TO ENVIRONMENTAL CONDITIONS SUCH AS ATMOSPHERIC COMPOSITION AND PRESSURE AND AS A RESULT REQUIRES CALIBRATION FOR MATERIAIS IN A SPECIFIC ENVIRONMENT IN THE LABORATORY. HERE I PROPOSE TO EXAMINECARBONATES SULFATES AND ICE-MINERAL MIXTURES IN A SIMULATED MARTIAN ENVIRONMENT USING THE L1BS TECHNIQUE IN ORDER TO BETTER UNDERSTAND THE SIGNATURE OF THESE MATERIALS SHOULD MSL ENCOUNTER THEM ON MARS. THESE MATERIALS FORM AS THE RESULT OF INTERACTIONS BETWEEN SURFACE MATERIALS AND WATER AND PROVIDE MUCH INFORMATION ABOUT THE AQUEOUS ALTERATION ENVIRONMENT. BOTH CHEMICAL COMPOSITION AND ROCK TYPE MAY BE DETERMINED USING MULTIVARIATE ANALYSIS (MVA) TECHNIQUES WHICH EXPLOIT MATRIX EFFECTS DUE COMPLEX INTERACTIONS BETWEEN SPECIFIC SAMPLE CHARACTERISTICS. THIS CALIBRATION WILL BE USEFUL FOR IN SITU ANALVSIS OF MINERALS IN A VARIETV OF DENOSITIONAL ENVIRONMENTS WITHIN THE MSL LANDING SITE.