Results from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) of phyllosilicate-rich regions are reported. It is discovered that stratigraphic relationships show olivine-rich materials overlying phyllosilicate-bearing units, indicating cessation of aqueous alteration before emplacement of the olivine-bearing unit. It is also found phyllosilicates in sedimentary deposits clearly laid by water, pointing to a rich diversity of Noachian environments conducive to habitability.
- John F. Mustard
- S. L. Murchie
- M. Wolff
