An Intense Terminal Epoch of Widespread Fluvial Activity on Early Mars: 2. Increased Runoff and Paleolake Development
- R. Irwin, A. Howard, R. Craddock, J. Moore
- Geology
- 1 December 2005
[1] To explain the much higher denudation rates and valley network development on early Mars (>∼3.6 Gyr ago), most investigators have invoked either steady state warm/wet (Earthlike) or cold/dry…
An intense terminal epoch of widespread fluvial activity on early Mars: 1. Valley network incision and associated deposits
[1] We present evidence that a final epoch of widespread fluvial erosion and deposition in the cratered highlands during the latest Noachian or early to mid-Hesperian was characterized by integration…
Large alluvial fans on Mars
[1] Several dozen distinct alluvial fans, 10 to ∼40 km long downslope, have been observed in highlands craters. Within a search region between 0° and 30°S, alluvial fan-containing craters were found…
Martian Layered Fluvial Deposits: Implications for Noachian Climate Scenarios
- J. Moore, A. Howard, W. Dietrich, P. Schenk
- Environmental Science, Geology
- 1 December 2003
Fluvial deposits in a basin north of Holden crater exhibiting a sinuous, anabranching pattern are of deltaic or fan origin. Channel width and meander wavelength indicate persistent flow magnitudes of…
Evidence for a subsurface ocean on Europa
- M. Carr, M. Belton, J. Veverka
- Geology, PhysicsNature
- 22 January 1998
High-resolution Galileo spacecraft images of Europa are presented, in which evidence for mobile ‘icebergs’ is found and the detailed morphology of the terrain strongly supports the presence of liquid water at shallow depths below the surface, either today or at some time in the past.
The influence of thermal inertia on temperatures and frost stability on Triton
- J. Spencer, J. Moore
- Environmental Science
- 1 October 1992
Mechanical and geological effects of impact cratering on Ida
- E. Asphaug, J. Moore, D. Morrison, W. Benz, M. Nolan, R. Sullivan
- Geology
- 1 March 1996
Asteroids respond to impact stresses differently from either laboratory specimens or large planets. Gravity is typically so small that seismic disturbances of a few cm s−1can devastate unconsolidated…
Does Europa have a subsurface ocean? Evaluation of the geological evidence
- R. Pappalardo, M. Belton, K. Williams
- Geology
- 25 October 1999
It has been proposed that Jupiter's satellite Europa currently possesses a global subsurface ocean of liquid water. Galileo gravity data verify that the satellite is differentiated into an outer H2O…
The nature of coarse-grained crystalline hematite and its implications for the early environment of Mars
- D. Catling, J. Moore
- Geology
- 1 October 2003
Long-term precipitation and late-stage valley network formation: Landform simulations of Parana Basin, Mars
- C. Barnhart, A. Howard, J. Moore
- Geology
- 2009
[1] We use a computer landform evolution model to show that Noachian-Hesperian-aged, late-stage valley network formation required numerous and repeated moderate flood events rather than one or a few…
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