The Red Planet’s Holden Crater Posted on June 8, 2020 by Frank Cisco Exquisite layering is revealed emerging from the sand in southern Holden Crater. Sequences like these offer a window into Mars’ complicated geologic history. via NASA https://ift.tt/37c8bBu Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related