Tag Archives: clays

HiRISE: A closer look at Holden Crater

Holden Crater in southern Margaritifer Terra displays a series of finely layered deposits on its floor (white and light purple in an enhanced color image). The layered deposits are especially well exposed in the southwestern section of the crater where … Continue reading

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More recent clay formation on Mars?

Clays and other minerals formed when rocks are altered by water have been found in multiple locations on Mars. It’s been assumed that these minerals probably formed in the earliest Martian epoch, over 3.7 billion years ago. But a new … Continue reading

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HiRISE: Clays exposed by an impact

Clays exposed by an impact in Tyrrhena Terra  — Tyrrhena Terra is south of the Martian equator and immediately northeast of the giant Hellas basin. Beautiful Mars series.

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HiRISE: Possible phyllosilicates in a butte remnant

Possible phyllosilicates in a butte remnant. Beautiful Mars series.

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HiRISE: Possible phyllosilicates in Nirgal Vallis

Possible phyllosilicates in Nirgal Vallis. Beautiful Mars series.

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HiRISE: Clays exposed on Ladon Valles basin floor

Clays exposed along Ladon Valles basin floor. Beautiful Mars series.

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HiRISE: Clays along the Coprates Chasma plateau

This image shows exposures of deposits along the plateau just to the south of Coprates Chasma. Whereas Coprates Chasma and many of the other chasmata of Valles Marineris contain kilometer-thick light-toned mounds made up of… [More at link]

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HiRISE: Possible clays along Lorica Crater wall

Possible clays along Lorica Crater wall. Beautiful Mars series.

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Opportunity explores aluminum-bearing site

With its solar panels their cleanest in years, NASA’s decade-old Mars Exploration Rover Opportunity is inspecting a section of crater-rim ridgeline chosen as a priority target due to evidence of a water-related mineral. Orbital observations of the site by another … Continue reading

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CRISM: Aluminum and iron/magnesium clays in Mawrth Vallis

This image, which covers a site located northeast of Oyama Crater, shows aluminum-containing minerals called phyllosilicates in a cyan color and iron-magnesium-containing phyllosilicates in a red/magenta color. Phyllosilicates are clay and clay-like minerals formed by chemical reactions with liquid water. … Continue reading

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