Mariner photography of Mars and aerial photography of Earth: Some analogies

Evaporation of ice in planetary atmospheres: Ice-covered rivers on mars

“…1971;Belcher, Veverka, and Sagan, 1971;Sharp, 1973;Soderblc:n and Wenner, 1978) . A post-Viking discussion of a range of features attributed to permafrost on Mars is made by Carr and Schaber (1977).…”

The prospects for life on Mars: A pre-Viking assessment

“…Now that extensive vulcanism is known to exist on Mars, as well as probable thermokarst terrains (Sharp, et al, 1971;Belcher, et al, 1971) a previous suggestion (Lederberg and Sagan, 1964) that there may be locales of geothermal penetration of the subsurface permafrost layer and consequent patches of subterranean liquid water appears somewhat more plausible. It has also been suggested (Sagan at al., 1968;Farmer, 1976) that ice, deposited in soil interstices, may enter a temporary liquid phase due to the soil diffusion barrier.…”

“…A lander imaging experiment, for example, can detect an unusual biogeometry even if the macrobe's metabolism is very exotic. These considerations by melting and lateral flow of subsurface permafrost ( Sharp et al, 1971;Belcher et al, 1971). Chaotic terrain covers more than 1% of the Martian surface.…”

Geomorphological Processes on Terrestrial Planetary Surfaces

“…This occurs because understanding and interpretation of features on other planetary surfaces is most effectively approached through analogues from Earth (Belcher et al 1971, Frey 1979, Hartmann 1974, Komar 1979, Malin 1974, Trevena & Picard 1978, Veverka & Liang 1975, as examples among others). Geologists and geomorphologists (students of landforms and surface processes) are able to make significant contributions to space exploration programs because of their background and experience with earthly forms and processes.…”