Quenched glass formed by hypervelocity impacts can encapsulate and preserve biosignatures on Earth, demonstrating the fossilization potential of glass-rich impactites on Mars. However, definitive spectral signatures of impact glass have not been identified on the martian surface from orbital remote sensing. Here we present a remote compositional survey of probable impactites in well-preserved c...

We present new evidence for dark mafic sediment layers, exposed at impact crater or pit walls as well as on impact crater floors, to embody local sources for the dark aeolian dunes material on Mars. CTX, HiRISE, HRSC and CRISM data prove that those layers have a wider geographical distribution as previously thought. Age determinations of selected source regions led suggest that the exposure tim...

melt fractions that percolated pervasively throughout the massif and On the basis of their structural and compositional characteristics, had a refractory, calc-alkaline character. Locally, these melts were mafic rocks in the Ronda peridotite are classified into four groups: tapped into cracks forming intrusive dykes. group A (garnet-bearing rocks) occurring in the spinel tectonite domain; group...