Bob Grimm - Mars Groundwater
HYDROGEOLOGY OF MARS
Research highlights. See Curriculum Vitae for citations.
All of the work cited here was led by Keith Harrison (now at SwRI)
Quantified scaling of hydrothermal activity in shaping martian crustal processes. Constrained large-scale permeability of martian crust to >1e-16 m2. Quantified correlation between valley networks and magnetic anomalies in southern highlands (Harrison and Grimm, 2002)
Inferred that supporting liquid or gas was present in long-runout Valles Marineris landslides from dynamical modeling (Harrison and Grimm, 2003).
Established that large water volumes required to carve outflow channels in turn required a hydrologic cycle, with Tharsis providing the most efficient recharge and largest hydraulic head (Harrison and Grimm, 2004).
Demonstrated that valley networks densely dissecting the surface are generally older than those that sparsely dissect the surface, suggesting a transition from surface runoff to groundwater sapping associated with ancient climate change (Harrison and Grimm, 2005).
1. Warrego Valles, type location for densely dissecting valley networks.
2. Nanedi Valles, type location for sparsely dissecting valley networks.
3. Tributary canyon likely formed by groundwater sapping incises plains covered by densely dissecting fluvial valleys west of Echus Chasma. All images THEMIS daytime.