Tag Archives: active dunes

THEMIS: Active dune field in Noachis

Posted on December 13, 2018 by rburnham

THEMIS Image of the Day, December 13, 2018. Today’s VIS image shows sand dunes on the floor of an unnamed crater in Noachis Terra. These dunes are likely active because they are dark, indicating that they move often enough to … Continue reading →

Posted in Reports | Tagged active dunes, Arizona State University, ASU, basaltic sand, Mars Odyssey, mid-latitude mantling, NASA, Noachis Terra, sand, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System | Comments Off

THEMIS: Gullies in Noachis Terra

Posted on December 10, 2018 by rburnham

THEMIS Image of the Day, December 10, 2018. Numerous channels, also called gullies, dissect the rim of this unnamed crater in Noachis Terra. (Note that the lighting in this image comes from the lower right.) At upper right lies a … Continue reading →

Posted in Reports | Tagged active dunes, Arizona State University, ASU, dunes, gullies, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System | Comments Off

THEMIS: Halley Crater dunes

Posted on December 6, 2018 by rburnham

THEMIS Image of the Day, December 6, 2018. Halley Crater is located on the western side of Argyre Planitia. Sand dunes cover part of the crater floor. The dunes’ dark tone indicates they are free from dust. This in turn … Continue reading →

Posted in Reports | Tagged active dunes, Argyre Planitia, Arizona State University, ASU, basaltic sand, dunes, Halley Crater, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System | Comments Off

HiRISE: Active dunes in Wirtz Crater

Posted on November 29, 2018 by rburnham

These gorgeous dunes are likely active, with ripples on their upwind slopes and dark streaks on their downwind slopes forming and changing due to wind-driven sand motion. This motion will also keep the dune brink (the edge between the two … Continue reading →

Posted in Reports | Tagged active dunes, basaltic sand, dust devil tracks, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, sand dunes, University of Arizona | Comments Off

THEMIS: Active dunes in Noachis Terra

Posted on November 28, 2018 by rburnham

THEMIS Image of the Day, November 28, 2018. Today’s VIS image shows a sand sheet with surface dunes forms on the floor of an unnamed crater in Noachis Terra. Dark dunes indicate active dunes: Winds stir the sand, which kicks … Continue reading →

Posted in Reports | Tagged active dunes, Arizona State University, ASU, basaltic sand, Mars Odyssey, NASA, Noachis Terra, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System | Comments Off

THEMIS: Dunes in Kaiser Crater

Posted on November 23, 2018 by rburnham

THEMIS Image of the Day, November 23, 2018. This VIS image shows part of the floor of Kaiser Crater, including several sand dunes. Kaiser Crater is located in Noachis Terra. The dunes’ dark tone indicates they are free of dust, … Continue reading →

Posted in Reports | Tagged active dunes, Arizona State University, ASU, basaltic sand, dunes, Kaiser Crater, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System | Comments Off

Seeing Mars in a grain of sand

Posted on October 24, 2018 by rburnham

[Ed. note: The following is a guide to two recent special issues of the Journal of Geophysical Research; both collect papers reporting on studies of the Bagnold Dunes in Gale Crater. The guide complements the MSL report posted earlier here.] … Continue reading →