The Top of Coprates Chasma ESP_028962_1645 Science Theme: Geologic Contacts/Stratigraphy Image is about 1 km wide. This image covers a small portion of gigantic Coprates Chasma, part of Valles Marineris. With enhanced IR colors, we see a portion of the very top of the south wall of the canyon, looking down onto the steep upper slopes. The colors indicate that diverse rock types are present.