Characterization of clasts in the Glen Torridon region of Gale crater observed by the Mars Science Laboratory Curiosity Rover

Abstract

Granule- to cobble- sized clasts in the Glen Torridon region of Gale crater on Mars were studied using data captured by the Mars Science Laboratory (MSL) Curiosity rover between martian days (’sols’) 2302 and 2593. The morphology and composition of clasts has the potential to reveal the nature and extent of erosional processes acting in a region. In this analysis, measurements of shape, size, texture and element abundance of unconsolidated clasts within lower Glen Torridon were compiled. Eight primary clast types were identified, all of which are sedimentary rock and can be linked to local bedrock, suggesting short transport distances. Several clast types exhibit signs of eolian abrasion, such as facets, pits, flutes and grooves. These results indicate that clasts are the products of bedrock degredation followed by extensive eolian wear.