03.21.2017 Break in Raised Tread on Curiosity Wheel
02.27.2017 Swirling Dust in Gale Crater, Mars, Sol 1613
02.27.2017 Dust Devil Passes Near Martian Sand Dune
02.27.2017 Sand Moving Under Curiosity, One Day to Next
12.13.2016 Now and Long Ago at Gale Crater, Mars
12.13.2016 Where's Boron? Mars Rover Detects It
10.03.2016 Curiosity Self-Portrait at 'Murray Buttes'
10.03.2016 Butte 'M9a' in 'Murray Buttes' on Mars
09.19.2016 Ribbon Cutting
09.09.2016 Farewell to Murray Buttes (Image 5)
09.09.2016 Farewell to Murray Buttes (Image 4)
09.09.2016 Farewell to Murray Buttes (Image 3)
09.09.2016 Farewell to Murray Buttes (Image 2)
09.09.2016 Farewell to Murray Buttes (Image 1)
08.26.2016 Out-of-this-World Records
03.30.2016 Erisa Hines
03.30.2016 Buzz Aldrin
02.12.2016 Women in Science
02.09.2016 Adam Steltzner, a JPL engineer
01.27.2016 Night Close-up of Martian Sand Grains
01.27.2016 Curiosity Self-Portrait at Martian Sand Dune
12.17.2015 Alteration Effects at Gale and Gusev Craters
12.17.2015 Full-Circle View Near 'Marias Pass' on Mars
12.11.2015 Surface Close-up of a Martian Sand Dune
Possible Signs of Ancient Drying in Martian RockA grid of small polygons on the Martian rock surface near the right edge of this view may have originated as cracks in drying mud more than 3 billion years ago. Multiple images from the Mast Camera (Mastcam) on NASA's Curiosity Mars rover were combined for this mosaic of a block called "Squid Cove" and its immediate surroundings.
The location is within an exposure of Murray formation mudstone on lower Mount Sharp inside Gale Crater. Mastcam's right-eye camera, which has a telephoto lens, took the component images of this view on Dec. 20, 2016, during the 1,555th Martian day, or sol, of Curiosity's work on Mars. The rover drove farther uphill on Gale Crater before the possible mud cracks were detected in the Mastcam images. This possible evidence about the area's ancient environment prompted the rover mission to backtrack for closer inspection of Squid Cove and nearby target rocks.
This scene is presented with a color adjustment that approximates white balancing, to resemble how the rocks and sand would appear under daytime lighting conditions on Earth.
The polygons are about half an inch to 1 inch (about 1 to 2 centimeters) across. Figure A includes a scale bar of 30 centimeters (12 inches). The polygons are outlined by ridges. This could result from a three-step process after cracks form due to drying: Wind-blown sediments accumulate in the open cracks. Later, these sediments and the dried mud become rock under the pressure of multiple younger layers that accumulate on top of them. Most recently, after the overlying layers were eroded away by wind, the vein-filling material resists erosion better than the once-muddy material, so the pattern that began as cracks appears as ridges.
Mud cracks would be evidence of a drying interval between wetter periods that supported lakes in the area. Curiosity has found evidence of ancient lakes in older, lower-lying rock layers and also in younger mudstone that is above Squid Cove.
Malin Space Science Systems, San Diego, built and operates Mastcam. NASA's Jet Propulsion Laboratory, a division of the Caltech in Pasadena, California, manages the Mars Science Laboratory Project for the NASA Science Mission Directorate, Washington, and built the project's Curiosity rover. More information about Curiosity is online at http://www.nasa.gov/msl and http://mars.nasa.gov/msl/.
Image Credit: NASA/JPL-Caltech/MSSS
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