Tag Archives: ice-rich mantling

THEMIS: Eroding layers in Spallanzani Crater

THEMIS Image of the Day, January 31, 2019. This VIS image shows part of the floor of Spallanzani Crater. At some point after the crater was created the floor was covered by a fill material. The material was laid down … Continue reading

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THEMIS: Moving downhill

THEMIS Image of the Day, January 18, 2019. This VIS image shows an isolated mountain east of Hellas Planitia. Erosion is moving material down hill towards the lower elevations. The linear features on the hill debris indicate that volatiles such … Continue reading

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THEMIS: Gullies and floor features in Aonia Terra crater

THEMIS Image of the Day, January 17, 2019. Many large gullies dissect the rim of this unnamed crater in Aonia Terra.  The inner walls and floor both show evidence of pasted-on terrain — a layer of potentially ice-rich dust. See … Continue reading

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THEMIS: Graben cuts across Claritas Fossae crater

THEMIS Image of the Day, December 7, 2018. Located on the northern margin of Aonia Terra, this unnamed crater interacts with one of the fossa, also called a graben. In this image, it is apparent that the tectonic depression crosses … Continue reading

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THEMIS: The bumpy hills of Arcadia Planitia

THEMIS Image of the Day, June 21, 2018. The hills in this VIS image are part of mound located in Arcadia Plantia. Just west of these hills is a long region of grouped hills called Phlegra Montes. The soft contours, … Continue reading

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THEMIS: Mantling on Terra Sabaea channel

THEMIS Image of the Day, May 4, 2018. This VIS image shows one of the numerous unnamed channels in northern Terra Sabaea. The softened features in the image suggest that some kind of mantling material lies over much of the … Continue reading

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THEMIS: Softly rounded hills in Phlegra Montes

THEMIS Image of the Day, April 25, 2018. The rounded hills in this VIS image are located in Arcadia Planitia. Broad linear ridges and groups of hills in this region are part of Phlegra Dorsa (ridges) and Phlegra Montes (hills). … 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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HiRISE: Layered mantling deposits in the northern mid-latitudes

Ice-rich mantling deposits accumulate from the atmosphere in the Martian mid-latitudes in cycles during periods of high obliquity (axial tilt), as recently as several million years ago. These deposits accumulate over cycles in layers, and here in the southern mid-latitudes, … Continue reading

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HiRISE: Old features and new

This image covers a portion of a typical impact crater in Terra Sirenum at about 40 degrees south latitude on Mars. At the top of the image, outside the crater rim, there is a mid-latitude mantle, rough in places where … Continue reading

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