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# Long description

This figure is an illustration showing ten pie charts. Each pie chart represents the composition of the mudstone analysed along the Curiosity rover’s traverse along the martian surface and they are arranged along a line representing that traverse. The locations marked on the line, from left to right, are Yellowknife Bay, Pahrump Hills, Marias Pass, Base of Naukluft, and Murray Buttes. The minerals present are represented by colours: Feldspar is dark grey, mafic minerals are light grey, magnetite is black, haematite is red, clay minerals are green, crystalline silica is blue, jarosite is purple, fluorapatite is orange and calcium sulfate is yellow. All pie charts have a large wedges of dark grey and light grey. All bar two have a wedge of green, and all bar four have wedges of red and yellow. Blue, purple and orange wedges are much less common.