HiRISE: High Resolution Imaging Science Experiment http://hirise.lpl.arizona.edu Weekly image updates from the HiRISE Camera onboard the Mars Reconnaissance Orbiter en-us webmaster@pirl.lpl.arizona.edu (The Guys at HiRISE) Wed, 19 Nov 2008 20:00:00 GMT Light-Toned Rocks in Terra Meridianihttp://hirise.lpl.arizona.edu/PSP_010222_1815At the finest scale, the light sediments visible in this image are intricately textured.Dunes in Abalos Undaehttp://hirise.lpl.arizona.edu/PSP_010219_2785It is possible that the dunes are no longer migrating and the tiny ripples are the only active parts today.Reading the Rock Record at Nili Fossaehttp://hirise.lpl.arizona.edu/PSP_010206_1975This image captures a record of changing environments on ancient Mars, as recorded in the rock record at Nili Fossae. Stratigraphy of the North Polar Depositshttp://hirise.lpl.arizona.edu/PSP_010198_2645This image is particularly interesting because it crosses complicated trough geometry, making the layers appear curved and exposing multiple stratigraphic levels. Colorful Ancient Rocks Near Mawrth Vallishttp://hirise.lpl.arizona.edu/PSP_010183_2035Polygonal fracture patterns (similar to a tiled floor) are visible on the surfaces of some of these rocks.Barchan Dunes in Chasma Borealehttp://hirise.lpl.arizona.edu/PSP_010169_2650Barchan dunes are also commonly found on Earth, and are crescent-shaped with a steep slip face bordered by horns oriented in the downwind direction.Western Rim Region of Korolev Craterhttp://hirise.lpl.arizona.edu/PSP_007961_2530At highest resolution both bright and dark areas of the surface are covered by polygonal fracture patterns Updated Scrollclips http://hirise.lpl.arizona.edu/nea.php Updated scrollclips for this week’s captioned releases for the iPhone, Apple TV, QuickTime and Windows Media.