Tag Archives: Compact Reconnaissance Imaging Spectrometer for Mars

CRISM: Evidence of aqueous alteration near Mawrth Vallis

CRISM image 21BCB covers a region on the boundary of Chryse Planita, between Mawrth Vallis and Oyama crater. Chryse Planitia is a smooth circular 1600 km diameter plain that was a landing site for the U.S Viking 1 (landed July … Continue reading

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CRISM: Delta in Jezero Crater

Jezero Crater is a ~45km crater near the Nili Fossae region which is believed to have once been flooded with water. The crater consists of a fan-delta system that deposited rich clays in the area. An important detail for us … Continue reading

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CRISM: Clays near Mawth Vallis

Mawrth Vallis is an ancient Mars river channel (~15km wide) located along the crustal dichotomy boundary that exposes abundant light-toned layers of clay-rich rocks. Indicative of aqueous alteration, these clays may have been deposited during massive flooding events or in … Continue reading

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Mars gullies not carved by flowing water?

New findings using data from NASA’s Mars Reconnaissance Orbiter show that gullies on modern Mars are likely not being formed by flowing liquid water. This new evidence will allow researchers to further narrow theories about how Martian gullies form, and … Continue reading

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Rise and fall of Martian lakes

There is a wealth of evidence, collected over the past few decades, suggesting liquid water was abundant in the early history of Mars. However, the size, evolution, and duration of standing bodies of water such as lakes on Mars’ surface … Continue reading

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Mineral clues to subglacial volcanos in Sisyphi Montes

Volcanoes erupted beneath an ice sheet on Mars billions of years ago, far from any ice sheet on the Red Planet today, new evidence from NASA’s Mars Reconnaissance Orbiter suggests. The research about these volcanoes helps show there was extensive … Continue reading

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RSLs are caused by flows of liquid brines

New findings from NASA’s Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars. Using an imaging spectrometer on MRO, researchers detected signatures of hydrated minerals on slopes where mysterious streaks are seen … Continue reading

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Tallying up where the Martian carbon went

Scientists may be closer to solving the mystery of how Mars changed from a world with surface water billions of years ago to the arid Red Planet of today. A new analysis of the largest known deposit of carbonate minerals … Continue reading

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Scientists detect impact glass on Martian surface

NASA’s Mars Reconnaissance Orbiter (MRO) has detected deposits of glass within impact craters on Mars. Though formed in the searing heat of a violent impact, such deposits might provide a delicate window into the possibility of past life on the … Continue reading

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CRISM: Phyllosilicates near Syrtis Major

This image shows a site near Syrtis Major, an expansive volcanic structure. This CRISM image displays olivine-rich rocks in red and rocks rich in iron-magnesium- containing clay-like minerals called phyllosilicates in various other colors. Olivine is present in most places … Continue reading

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