Physics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...51..121m&link_type=abstract
Icarus, vol. 51, July 1982, p. 121-132.
Physics
3
Channel Flow, Environment Simulation, Mars Environment, Mars Surface, Planetary Geology, Terrain Analysis, Atmospheric Pressure, Atmospheric Temperature, Mars Atmosphere, Outlet Flow, Planetary Evolution, Planetology, Surface Properties
Scientific paper
Outflow channeling and associated chaotic terrain were created under temperature and pressure conditions suggested for a diluvian period on Mars 3.5 to 0.5 billion years ago. Pressures under which both features were formed ranged from 130 to 34 mbar at a constant ambient temperature of 266 K. Analogs of the collapse structures and channels evolved in a high-altitude/low-temperature chamber are found on the Martian surface. Similarities exist not only in their overall morphology but in the finer details of the megastructures themselves. The critical factor that allowed channelized flow to occur was the sudden release of liquid water derived from melting of subsurface ground ice and ice layers under the low atmospheric pressure and temperature conditions within the chamber. Experimentation may indicate the existence of substantially thick water ice layers beneath the Martian regolith prior to the outflow channeling episode.
Johnson Paul A.
Manker J. P.
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