HiRISE: High Resolution Imaging Science Experiment http://uahirise.org Image updates from the HiRISE Camera onboard the Mars Reconnaissance Orbiter en-us editor@uahirise.org (Ari) Wed, 16 Jul 2014 13:00:00 MST Ancient Lake Sediments in a Craterhttp://uahirise.org/ESP_037122_2165Our observation shows layered deposits, some with polygonal patterns, as might be expected from lake sediments. The Icy Surface of the North Polar Caphttp://uahirise.org/ESP_036867_2655At Mars' North Pole is a dome of icy layers ranging up to 2 kilometers thick, roughly analogous to the Earth's ice caps in Greenland or Antarctica.Ridges in Eridania Basinhttp://uahirise.org/ESP_036654_1490Eridania Basin has mounting geomorphic and spectral evidence that it may have been the site of an ancient inland sea.