Tag Archives: Arizona State University

THEMIS: Flood-scoured floor of Lobo Vallis

THEMIS Image of the Day, April 20, 2018. Today’s VIS image shows a small portion of Lobo Vallis near where it recombines with Kasei Valles and empties into Chryse Planitia. Kasei Valles is a huge channel system that drained the … Continue reading

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THEMIS: Big blocky faults in Sacra Fossae

THEMIS Image of the Day, April 19, 2018. Located on the western margin of Lunae Planum, Sacra Fossae is a group of linear depressions. The right angle turns and uniform width seen in this VIS image indicate that these channels … Continue reading

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THEMIS: Interweaving channels of Osuga Valles

THEMIS Image of the Day, April 18, 2018. Osuga Valles is a complex set of channels located near Eos Chasma. The channels were likely cut by multiple episodes of flowing water. More THEMIS Images of the Day by geological topic. … Continue reading

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THEMIS: Blast scour at Bonestell Crater

THEMIS Image of the Day, April 17, 2018. Bonestell Crater is a relatively young crater located in Acidalia Planitia. The grooved surface of the ejecta blanket is evident in this VIS image. The grooves were likely eroded by the outward … Continue reading

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THEMIS: Old craters in an even older land

THEMIS Image of the Day, April 16, 2018. This VIS image shows several craters. The interior of the central one has retained much of the original topography, including the central peak. The floor has not been smoothed by deposits of … Continue reading

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THEMIS: Landslides in Tyrrhena Terra

THEMIS Image of the Day, April 13, 2018. This VIS image is located in an unnamed crater within Tyrrhena Terra. The ‘mitten’ shaped feature extends from the crater rim (bottom of frame) onto the crater floor. Radial surface grooves and … Continue reading

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THEMIS: Channels cutting across channels in Olympica Fossae

THEMIS Image of the Day, April 12, 2018. Olympica Fossae is a complex channel located on the volcanic plains between Alba Mons and Olympus Mons. The sinuosity of the large channel in the middle of the image indicates that this … Continue reading

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THEMIS: Dunes and creeping ground in Lyot Crater

THEMIS Image of the Day, April 11, 2018. Lyot Crater is a large, complex crater in the northern lowlands of Vastitas Borealis. This image is located along the southern rim of the crater and shows part of the dune fields … Continue reading

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THEMIS: Wind, dust, and gravity in Medusae Fossae

THEMIS Image of the Day, April 10, 2018. This VIS image is located in Medusae Fossae. Along the cliffside several dark streaks are visible. It is thought that these streaks mark the location where downslope movement of material has removed … Continue reading

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THEMIS: Channel within a channel in Terra Sirenum

THEMIS Image of the Day, April 9, 2018. Today’s VIS image is located along the northern margin of Terra Sirenum. This unnamed channel contains a small channel within a larger channel. This would indicate two separate channel forming events. The … Continue reading

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