Our goal is to compare textures and determine stratigraphy for these two materials. Enhanced color very useful for mapping units of distinct composition.
Dark
Light
Data from other instruments, such as THEMIS and CRISM, imply that chlorides are present here; the CRISM data reveal that iron/magnesium clays are also present.
Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_016162_1495
Related Posts
A Tale of Collapse Terrain
North of Ganges Chasma lies Orson Welles Crater, whose floor contains broken up blocks we call chaotic terrain and which is the source for the major outflow channel Shalbatana Vallis.
Sunken and Pitted Ejecta
The objective of this observation was to examine the edge of impact ejecta from a crater to the north-west of this area (north is up, west is to the left).
Dark Striations near Holmes Crater
Context Camera imagery reveals dark streaks extending east of minor crater rims within and around Holmes Crater.
Possible Impact Melt in Terra Sabaea
Nighttime and daytime infrared images from THEMIS suggest a consolidated deposit in the floor of this ancient crater in Terra Sabaea, potentially with some bedrock exposure.