Subj : MODIS Pic of the Day 12 October 2022 To : All From : Dan Richter Date : Wed Oct 12 2022 12:00:12 October 12, 2022 - Tassili n'Ajjer Tassili n Tweet Share In south-eastern Algeria, sitting at the borders of Libya, Niger, and Mali, a vast and ancient plateau rises from the Sahara Desert. On October 9, 2022, the Moderate Resolution Imaging Spectroradiometer (MODIS) on board NASA’s Terra satellite acquired a true-color image of this rugged region of rock and orange sand dunes, which is known as Tassili n’Ajjer. The name Tassili n’Ajjer translates to “plateau of chasms,” which clearly describes the deep fissures and canyons long ago cut into the rock by flowing water. The dune field, seen in this image as orange roughly parallel lines, took shape after an ancient lake dried up. The dark area is predominately formed of sandstone. Tassili n’Ajjer is a UNESCO World Heritage Site with more than 15,000 prehistoric etchings and illustrations on the cave walls; these record a human presence as far back as 6000 BCE. Image Facts Satellite: Terra Date Acquired: 10/9/2022 Resolutions: 1km (199.5 KB), 500m (597 KB), 250m (1.7 MB) Bands Used: Image Credit: MODIS Land Rapid Response Team, NASA GSFC https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2022-10-12 --- up 32 weeks, 2 days, 20 minutes * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3) .