What clays can tell us about past climate at Mawrth Vallis, Mars


Wednesday, March 17 2010 - 12:00 pm, PDT
Nancy McKeown
Earth and Planetary Science Department, UC Santa Cruz

Mawrth Vallis has one of the largest exposures of phyllosilicates on Mars. Originally observed by OMEGA, CRISM has refined the detections and allowed positive identification of several phyllosilicate minerals including nontronite, montmorillonite, and kaolinite, as well as hydrated silica, based on their distinct spectral characteristics. The textures and morphologies of these units have been characterized using HiRISE imagery. Nancy McKeown will discuss the identification and mapping of these phyllosilicates and their implications for past climate at Mawrth Vallis.

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