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Dulovo Crater - Mars Reconnaissance Orbiter
Eroded ejecta deposits associated with the 18 km wide Dulovo Crater. This crater is located near the southern rim of the 1500 km wide Isidis impact basin. The impact site is near the Martian dichotomy boundary, which separates the ancient terrain of Mars' southern hemisphere from the much younger lowlands of the northern hemisphere. The northern lowlands are thought to have once hosted an ocean, evidence of which might be recorded in Dulovo's ejecta.
The crater's ejecta is a type called fluidized ejecta, which contains flow-like structures. This type of ejecta is thought to have formed in rocks rich in low-melting point materials, such as dry ice or water ice. Erosional remnats of the fluidized ejecta are visible has high-standing lobes of material running through image center. The more rugged rock, which is likely older rock buried and preserved by the ejecta sheet, appear to contain clay minerals.
This image was created using the CRISM imaging spectrometer. Each pixel of a CRISM image contains a 500 point spectrum, from which a color can be reconstructed. This reconstructed color was overlaid on a higher-resolution image taken with the Mars Reconnaissance Orbiter Context Camera (CTX), which simultaneously took a photo while CRISM was collecting data.
This image was taken on January 2, 2007. It uses CRISM observation FRT00003B63 and CTX observation P03_002044_1836_XI_03N275W.
Image Credit: NASA / JPL / JHUAPL / MSSS / Justin Cowart
Dulovo Crater - Mars Reconnaissance Orbiter
Eroded ejecta deposits associated with the 18 km wide Dulovo Crater. This crater is located near the southern rim of the 1500 km wide Isidis impact basin. The impact site is near the Martian dichotomy boundary, which separates the ancient terrain of Mars' southern hemisphere from the much younger lowlands of the northern hemisphere. The northern lowlands are thought to have once hosted an ocean, evidence of which might be recorded in Dulovo's ejecta.
The crater's ejecta is a type called fluidized ejecta, which contains flow-like structures. This type of ejecta is thought to have formed in rocks rich in low-melting point materials, such as dry ice or water ice. Erosional remnats of the fluidized ejecta are visible has high-standing lobes of material running through image center. The more rugged rock, which is likely older rock buried and preserved by the ejecta sheet, appear to contain clay minerals.
This image was created using the CRISM imaging spectrometer. Each pixel of a CRISM image contains a 500 point spectrum, from which a color can be reconstructed. This reconstructed color was overlaid on a higher-resolution image taken with the Mars Reconnaissance Orbiter Context Camera (CTX), which simultaneously took a photo while CRISM was collecting data.
This image was taken on January 2, 2007. It uses CRISM observation FRT00003B63 and CTX observation P03_002044_1836_XI_03N275W.
Image Credit: NASA / JPL / JHUAPL / MSSS / Justin Cowart