Do more with one link - claim and personalize your FREE link today! Effortlessly schedule, video meet, message chat, network, share materials, e-sign, etc – all in one spot. Collaborate, Nurture connections, Improve client services, Expedite deal closures, and more. 💼 Join FREE!!

Recent Comments

    Mars Gullies tagged posts

    Mars Gullies likely Not formed by Liquid Water

    August 12, 2016, Categories  Astronomy/Space

    The highly incised gullies on the eastern rim of the 150 km × 125 km Hale crater (located at 35.7°S, 323.4°E) as seen in the HiRISE image (top) resemble gullies on Earth and appear to have been carved by liquid water. However, when the gullies are observed with the addition of mineralogical information from CRISM (bottom), unaltered mafic material (light blue) from the crater rim is carved and transported downslope along the gully channels. No hydrated minerals are observed within the gullies in the CRISM image, indicating limited to no interaction of the mafic material with liquid water. These findings suggest that a different mechanism that does not involve liquid water may be responsible for carving these gullies on Mars. The top image is a HiRISE image (HiRISE PSP_002932_1445), and the bottom image is the same HiRISE image with a CRISM mineral map (CRISM FRT00004AF7) overlaid on top. Credit: NASA/JPL/Univ. of Arizona/JHUAPL

    The highly incised gullies on the eastern rim of the 150 km × 125 km Hale crater (located at 35.7°S, 323.4°E) as seen in the HiRISE image (top) resemble gullies on Earth and appear to have been carved by liquid water. However, when the gullies are observed with the addition of mineralogical information from CRISM (bottom), unaltered mafic material (light blue) from the crater rim is carved and transported downslope along the gully channels. No hydrated minerals are observed within the gullies in the CRISM image, indicating limited to no interaction of the mafic material with liquid water. These findings suggest that a different mechanism that does not involve liquid water may be responsible for carving these gullies on Mars...

    Read More

    Gullies on Mars Sculpted by Dry Ice rather than Liquid Water

    December 26, 2015, Categories  Astronomy/Space

    Examples of Martian Gullies. Until recently they were thought to have been sculpted by flowing liquid water, but they may result from defrosting dry ice processes at the end of winter. On the right, gullies on dunes in Russel Crater (54.3°S-12.9°E) are partially covered by CO2 ice. On the left, sinous gullies in a Crater in Newton Basin (41°S-202°E) Credit: Image courtesy of CNRS

    Examples of Martian Gullies. Until recently they were thought to have been sculpted by flowing liquid water, but they may result from defrosting dry ice processes at the end of winter. On the right, gullies on dunes in Russel Crater (54.3°S-12.9°E) are partially covered by CO2 ice. On the left, sinous gullies in a Crater in Newton Basin (41°S-202°E) Credit: Image courtesy of CNRS

    Mars’s gullies may be formed by dry ice processes rather than flowing liquid water, as previously thought. Scientists show that, during late winter and spring, underneath the seasonal CO2 ice layer heated by the sun, intense gas fluxes can destabilize the regolith material and induce gas-lubricated debris flows which look like water-sculpted gullies on Earth...

    Read More