Characterization of hydrated silicate-bearing outcrops in Tyrrhena Terra, Mars: Implications to the alteration history of Mars

► Tyrrhena Terra Region of Mars studied with orbital datasets. ► Numerous detections of phyllosilicates and zeolites associated to impact craters. ► Mineralogy and geomorphology indicate exhumation of pre-impact altered rocks. ► Mineralogy points to regional low-grade metamorphism or extended hydrothermal systems. ► Alluvial deposition in plains may have concentrated altered rocks.