Tag Archives: Thermal Emission Imaging System

THEMIS: Dark streaks on slopes — wet or dry?

THEMIS Image of the Day, June 22, 2018. Located on the rim of Chia Crater, this smaller crater contains a multitude of dark slope streaks. These features are assumed to represent down slope movements of material, either a process that … 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: On the shore of a sea of sand

THEMIS Image of the Day, June 20, 2018. This VIS image shows a small part of the huge northern dune field called Olympia Undae. This dune field surrounds 1/3 of the north polar cap. Collected in northern summer, there is … Continue reading

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THEMIS: Dunes and sand sheet in Rabe Crater

THEMIS Image of the Day, June 19, 2018. The large sand sheet with surface dune forms seen in this VIS image is located on the complex floor of Rabe Crater. The sand is likely derived by erosion into the deposit … Continue reading

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THEMIS: Merging stream channels in Xanthe Terra

THEMIS Image of the Day, June 18, 2018. Today’s VIS image shows an unnamed channel in Xanthe Terra. The large bend in the channel was created as the flow of liquid from the bottom of the image was deflected by … Continue reading

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THEMIS: Flood-sculpted ridge in Shalbatana Vallis

THEMIS Image of the Day, June 15, 2018. This VIS image shows a section of Shalbatana Vallis. Shalbatana Vallis is one of many channels that empty into Chryse Planitia. More THEMIS Images of the Day by geological topic.

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THEMIS: Dust avalanches in Lycus Sulci

THEMIS Image of the Day, June 14, 2018. Lycus Sulci is a very complex region surrounding the northern and western flanks of Olympus Mons. This VIS image shows some of the tectonic ridges found in Lycus Sulci as well as … Continue reading

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THEMIS: Hebes Mensa

THEMIS Image of the Day, June 13, 2018. Located in the center of Hebes Chasma is a large deposit of layered material called Hebes Mensa. Extensive erosion has created gullies in the mensa and distributed fine sand size materials to … Continue reading

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THEMIS: Impact blast scars on crater rim

THEMIS Image of the Day, June 12, 2018. Today’s VIS image shows part of a crater located north of Hecates Tholus. The radial grooves in the ejecta blanket are still visible around the crater rim. There is also likely blast … Continue reading

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THEMIS: Wind-eroded Medusae Fossae formation

THEMIS Image of the Day, June 11, 2018. This VIS image shows part of Medusa Fossae. Winds have eroded materials in this region, creating ridges and valleys aligned with the direction of the wind. The formation materials appear soft and … Continue reading

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