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# Long description

This figure is a photograph taken with a scanning electron microscope. It is approximately 35 micrometers in diameter. It is in greyscale and shows a highly magnified rock sample. From the top left hand side to the bottom right hand side is a black band. To the left hand side of the black band is a band of mottled grey material labelled iddingsite. To the left of that is a smooth grey material with dark cracks running through it. To the right hand side of the black band is a partially striped dark grey band labelled Si-rich band. To the right of that is the smooth grey material, labelled olivine.