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CRISM (Compact Reconnaissance Imaging Spectrometer for Mars)
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Hydrated Minerals of Cydonia Colles
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Hydrated Minerals of Cydonia Colles

Acquired Date: January 17, 2008
Release Date: December 3, 2018
Latitude: 39.94 N
Longitude: 347.26 E
Keywords: Plains, Hydrated Mineral, Phyllosilicate minerals, Dichotomy Boundary, Northern Lowlands, Southern Highlands
Parameters: BD1900R/BD1950 (H2O), D2200 (Al-OH minerals), D2300 (Fe-Mg phyllosilicates)

In this scene we observe the knobs within the northern lowlands (Acidalia Planitia) that are Fe/Mg phyllosilicate-bearing (pink-blue) and small, patchy exposures of hydrated silica (green) surrounding the knobs. Previously, phyllosilicates have only been found within impact craters in the northern lowlands, having been exhumed from the underlying Noachian crust. This finding is consistent with these knobs being the remnants of an old basement of altered materials in the lowlands similar to the highlands material. There is also hydrated silica deposited in a younger unit embaying these knobs.

The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) is one of six science instruments on NASA's Mars Reconnaissance Orbiter. Led by The Johns Hopkins University Applied Physics Laboratory, the CRISM team includes expertise from universities, government agencies and small businesses in the United States and abroad.

CRISM's mission: Find the spectral fingerprints of aqueous and hydrothermal deposits and map the geology, composition and stratigraphy of surface features. The instrument also tracks seasonal variations in dust and ice aerosols in the Martian atmosphere, and water content in surface materials — leading to new understanding of the climate.


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