|Ancient Aliens on Mars II|
|Valles Marineris on Mars|
However, there are several flaws with the paper, primarily that it is extremely difficult to distinguish between igneous (volcanic) and sedimentary (usually water formed) rocks from orbit. It also depends on the existence of a series of invisible ancient volcanos on the Tharsis rise for which there is no evidence whatsoever.
There really are only two viable scenarios for the existence of Valles Marineris, Graham Hancock's "Astra" scenario, in which a massive asteroid got inside Mars' Roche Limit and blasted the planet in the location of the Hellas Basin, and the Mars Tidal Model authored by Richard C. Hoagland and myself.
|The "Astra" concept.|
|Join me at Contact in the Desert August 8-11 to discuss this!|