1. Holden NE crater Main Goals:
Discriminate between Lacustrine Delta/Alluvial Fan hypotheses
Analysis of the complex stratigraphy within the fan
Look for evidence for/against persistent flow

2. Holden Layers
Roughly 150 meters of layered deposits within the Holden fan
Stereo data shows distinct layers clearly
Profiles can be extracted along continuous outcrops of a single layer

3. Holden NE Layer Profiles
Current focus: determining strike and dip of layers, with the goal of examining structure perpendicular to channels

4. Meridiani Circular Feature
Main goals:
Determine Formation Process
Investigate regional stratigraphy

5. Geologic Map of Meridiani
Hematite Unit
Etched Terrain
Region of Interest
Region of interest is a small part of the geology of Meridiani
Units in the region of interest lie stratigraphically below hematite unit

6. Region of Interest Layered Blanket Dozens of layers Linear features
1 km

7. Meridiani DEM 4 stereo DEMs were produced of the circular feature
All DEMs had good correlation, but all had some degree of ‘jitter’

8. Stereo vs. MOLA Top – Stereo derived, gridded DEM profile
Bottom – MOLA gridded DEM profile
Both profiles show a fold in the topography
Circular feature tilted to the north
Depression has anomalously low depth/diameter ratio

9. Geologic Model Stratigraphy in this area is more complex than expected
This may be a clue to the depositional history of these units

10. Formation Hypotheses 1) Crater with sedimentary deposits
2) Crater with Fluidized Ejecta
3) Circular Anticline (dome)

11. Radial Profile