Tag Archives: impacts

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: 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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Asteroids from a martian mega-impact?

Like evidence left at a crime scene, the mineral olivine may be the clue that helps scientists piece together Mars’s possibly violent history. Could a long-ago giant impact have flung pieces of Mars throughout our inner solar system? Two researchers … Continue reading

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THEMIS: A peppering of small craters

THEMIS Image of the Day, April 4, 2018. This field of small dark craters is located in southern Elysium Planitia. The dark appearance against the surrounding lava flows suggests that the craters post-date the lava flows. The small “tails” near … Continue reading

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THEMIS: Yuty Crater ejecta

THEMIS Image of the Day, March 26, 2018. Off the image to the right is Yuty Crater, located between Simud and Tiu Valles. The crater ejcta forms the large lobes along the right side of this VIS image. This type … Continue reading

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HiRISE: Crater rim layers, rubble, and gullies

This is a close view of the rim and upper wall of an impact crater on the Martian surface. The layers in enhanced color are exposed subsurface strata that are relatively resistant to erosion. Boulder-like rubble beyond the crater rim … Continue reading

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HiRISE: Mojave Crater far-flung impact ejecta

Distal reaches of Mojave Crater impact ejecta. Beautiful Mars series.

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HiRISE: Layers on rim of southern impact crater

Swoop! – Layers on the rim of an impact crater in the southern region of Mars. Beautiful Mars series.

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HiRISE: Small, fresh, and martian

Small, fresh, and martian – By “fresh,” (and sometimes “recent”), we are talking in geological terms only. Beautiful Mars series.

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HiRISE: South polar pit or an impact crater?

It is late summer in the Southern hemisphere, so the Sun is low in the sky and subtle topography is accentuated in orbital images. We see many shallow pits in the bright residual cap of carbon dioxide ice (also called … Continue reading

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