HiRISE Science Team wrote:Cratered Dune Forms (ESP_025389_1690)
One of the scientific goals for taking this observation is to create a stereo pair with another HiRISE image. From stereo pairs, which are pictures of the same area but at different angles, HiRISE creates 3D or anaglyph pictures.
Known since at least 2003, this is a wonderful case of aeolian sandstone that (a) preserves its original sand dune bedform shapes and (b) lies unconformably over a previously-eroded surface of layered sedimentary rock.
Alfred McEwen wrote:Lava Lamp Terrain on the Floor of Hellas Basin (ESP_025780_1415)
Some of the weirdest and least-understood landscapes on Mars are on the floor of the deep Hellas impact basin. This image was acquired in northwest Hellas where depths are more than 6 kilometers below the reference (or roughly the average) altitude for Mars.
There are what look like impact craters but are elongated, as if stretched in a viscous manner (like in a lava lamp). Some of the flowing landforms are similar to those elsewhere in the middle latitudes of Mars, where the Shallow Radar (SHARAD) experiment on MRO has detected ice, but no ice detection has been reported here.
The floor of Hellas is relatively poorly mapped because it is often obscured by dust and haze in the atmosphere.
Candy Hansen wrote:Summer is on Its Way (ESP_025916_2555)
These dark sand dunes in the North polar region, basking in the sunshine of late spring, have shed most of their seasonal layer of winter ice.
A few bright ice deposits remain sequestered in "cold traps" shadowed from the sun on the poleward-facing side of the dunes. Some bright patches of ice at the foot of the sunlit side of the dunes may be places where ice slumped to the foot of the dune creating a longer-lasting snow bank.
Alfred McEwen wrote:A Wild Assortment of Jumbled Rocks (ESP_026412_2035)
This image covers a region of Mars near Nili Fossae that contains some of the best exposures of ancient bedrock on Mars.
The enhanced-color subimage shows part of the ejecta from an impact crater. The impact broke up already diverse rocks types and mixed them together to create this wild jumble of colors, each representing a different type of rock.
Credit: NASA/JPL/University of Arizona
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