THEMIS: Sand sheet in Halley Crater

Sheet of dunes in Halley Crater (THEMIS_IOTD_20181224)THEMIS Image of the Day, December 24, 2018. This VIS image shows part of the dune field on the floor of Halley Crater.

Rather than small individual sand dunes, the sand here is collected into a sand sheet and dune forms have been created on that surface. Halley Crater is located on the western margin of Argyre Planitia.

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