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Diverse Deposits in Melas Chasma

This scene includes chaotic deposits with a wide range of colors. The deposits are distinctive with both unique colors and small-scale textures such as fracture patterns.

These are probably sedimentary rocks, transported and deposited in water or air. The original layers may have been jumbled in a landslide. Dark or reddish sand dunes cover some of the bedrock.

uahirise.org/hipod/ESP_041134_
NASA/JPL-Caltech/University of Arizona

New Crater Blues

The blue appearance is due to the intense blast of the impact moving around dust on the surface. That dust is usually light-toned and reddish in color compared to what’s beneath it. When you remove the dust, you’re left with a dark spot that can sometimes be blue in comparison to the redder surroundings.

More: uahirise.org/hipod/ESP_053006_
NASA/JPL-Caltech/University of Arizona

Summer Sand Dunes

Mars’ permanent north polar cap is ringed by sand dunes. In the winter and spring the dunes are covered by a seasonal cap of dry ice.

Here, we see the dark dunes in the summer, bare of seasonal frost. Two classic barchan dunes march across the rugged terrain. The long dark dune is crossing transverse aeolian ridges probably formed in a previous climate regime.

uahirise.org/hipod/ESP_044088_
NASA/JPL-Caltech/University of Arizona

Frosted Gully Slopes in Shadows

This image was acquired just after the northern winter solstice, when Southern Hemisphere shadows are longest. However, the fine dust in the Martian atmosphere scatters light into the shadows, and HiRISE has the sensitivity to acquire useful images within shadows.

More -> uahirise.org/hipod/ESP_044327_

NASA/JPL-Caltech/University of Arizona

HiRISE 10K: Low-Order Inverted Streams near Juventae Chasma

The raised ridges are inverted channels. It is likely that liquid water, either pure or salt water, flowed through these channels.

Full cutout on Flickr: flic.kr/p/2qaeFtC
NASA/JPL-Caltech/University of Arizona

Tilted in Terra Cimmeria

The objective of this observation is to determine the nature of a tilted, layered deposit in a small crater. Also visible in Context Camera data, these features are relatively common in this area and some have odd shapes. They may have formed from mantle layers that have stacked up.

ID: ESP_075348_1405
date: 23 August 2022
altitude: 250 km

uahirise.org/hipod/ESP_075348_
NASA/JPL-Caltech/University of Arizona

HiRISE 8K: Gullies in a Crater in Noachis Terra

The gullies shown in this image are similar to terrestrial gullies produced by flowing water.

Full cutout on Flickr: flic.kr/p/2qa55YE

NASA/JPL-Caltech/University of Arizona

HiRISE 3D: Hillslope Shapes near Holden Crater

Landscapes such as rivers, deltas and alluvial fans have been studied extensively, proving to be reliable records of Mars’ paleoclimate, while hillslopes on Mars have largely been ignored.

uahirise.org/anaglyph/ESP_0830
NASA/JPL-Caltech/University of Arizona

A Recent Cluster of Impacts

The dark spots in this enhanced-color infrared image are the recent impact craters that occurred in the Tharsis region between 2008 and 2014.

The dark halos around the resulting impact craters are a combination of the light-toned dust being cleared from the impact event and the deposition of the underlying dark toned materials as crater ejecta.

uahirise.org/hipod/ESP_047768_
NASA/JPL-Caltech/University of Arizona

At the Confluence of Nirgal and Uzboi Valles

These layers may have been fluvial, volcanic, or aeolian (wind-blown).

Full cutout on Flickr: flic.kr/p/2qa49Hp
NASA/JPL-Caltech/University of Arizona

HiRISE 3D: South Polar Carbon Dioxide Glacier Crevasses

These troughs are likely crevasses formed from glacial flow and their size and shape provide important information regarding the thickness and size of polar carbon dioxide.

uahirise.org/anaglyph/ESP_0839

NASA/JPL-Caltech/University of Arizona

The Southern Floor of Gale Crater

This image along the southern interior floor of Gale Crater hosts many different landforms. Light-toned, scabby, and presumably hydrated materials on the crater floor are covered by large, darker-toned dunes.

The small crater, about 2 kilometers in diameter, in the middle of the image is filled with an enigmatic deposit that appears to have flowed into the crater from the south.

uahirise.org/hipod/ESP_043961_
NASA/JPL-Caltech/University of Arizona

HiRISE 3D: A Region outside a Crater in Phlegra Montes

Phlegra Montes is a range of gently curving mountains and ridges on Mars. It extends from the northeastern portion of the Elysium volcanic province to the northern lowlands.

uahirise.org/anaglyph/ESP_0838
NASA/JPL-Caltech/University of Arizona

Topography of the Mars Pathfinder Landing Site

Here we have the first HiRISE-produced digital terrain model of the Mars Pathfinder landing site.

Terrain here is relatively flat with only approximately 300 meters of relief, mostly due the largest crater in the scene and the hills dubbed “Twin Peaks,” first imaged by Pathfinder.

ID: PSP_002391_1995
date: 29 January 2007
altitude: 284 km

More: uahirise.org/hipod/PSP_002391_
NASA/JPL-Caltech/University of Arizona

The Mars Reconnaissance Orbiter launched 19 years ago today, carrying the best camera ever sent to another planet: HiRISE!

84,595 orbits later and still going.

Well done, carbon-units. Well done.

HiRISE 3D: Geological Contacts

Our goal is to explore the contact between the possible sulfates and chaos blocks within an older crater in eastern Iani Chaos.

Full image: uahirise.org/anaglyph/ESP_0837

NASA/JPL-Caltech/University of Arizona

Beautiful Blocks of Bedrock

This enhanced color image shows the wall of the crater, which exposes layering as well as blocks of rock. There is a distinctive large block in the upper left of the crater wall, generally referred to as a “mega-block.” Several smaller light-toned blocks are also in the crater wall, possibly of the same rock type as the “mega-block.”

More: uahirise.org/hipod/ESP_044902_

NASA/JPL-Caltech/University of Arizona

HiRISE 3D: Terrain Sample in Aeolis Planum

The surface in this region has been heavily eroded by wind action.

Full image: uahirise.org/anaglyph/ESP_0838

NASA/JPL-Caltech/University of Arizona

Bedrock Exposures in Nirgal Vallis

This observation covers two tributaries and a main channel with light-toned bedrock throughout the scene. HiRISE provides a more detailed look at the stratigraphy. Nirgal Vallis is a long river channel about 610 kilometers long, and is named after Nergal, the Babylonian god of war and counterpart to the Roman god of war Mars.

ID: ESP_075156_1515
date: 8 August 2022
altitude: 255 km

uahirise.org/hipod/ESP_075156_
NASA/JPL-Caltech/University of Arizona

HiRISE 3D: An Inverted Channel in Noachis Terra

This observation is part of a much wider network of inverted channels in Noachis.

Full image: uahirise.org/anaglyph/ESP_0836

NASA/JPL-Caltech/University of Arizona

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HiRISE (NASA)

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