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Water didn't exist in the past either because the mass of Mars will only support a heavy gas, i.e., Carbon Dioxide at a very small atmospheric pressure.
He (Morten Bo Madsen, associate professor and head of the Mars Group at the Niels Bohr Institute at the University of Copenhagen) explains that about 4.5 billion years ago, Mars had 6½ times as much water as it does now and a thicker atmosphere. But most of this water has disappeared out into space and the reason is that Mars no longer has global magnetic fields, which we have on Earth.
Water appears across Mars today in various forms, left over from a time billions of years ago when the planet was warmer and wetter. Orbiting probes have spotted ice, including buried glaciers, in many locations.
originally posted by: eManym
originally posted by: shawmanfromny
Hematite is a mineral that forms in water and Vera Rubin Ridge had groundwater flowing through it in the past.
Mars is incapable of supporting liquid water. It has an atmospheric pressure of 0.6% of Earth and its mass is about 10 percent the mass of the Earth. Any water, exists as ice and if present would immediately sublimate to a vapor on heating, the vapor existing in a very minute quantity.
Water didn't exist in the past either because the mass of Mars will only support a heavy gas, i.e., Carbon Dioxide at a very small atmospheric pressure.
If Mars had flowing water in the past it would have needed to have a higher mass and denser atmosphere. Reasonably, NASA should rethink their analysis instead of assuming processes on Earth work the same as on other planets.
Hematite can form during the interaction of hot magma with adjacent rocks. Considering the scattering of rocks all over the martian surface it must have had explosive volcanic activity or a collision with a planetesimal in the past.
Perhaps that is how the asteroid belt formed from a collision between Mars and a planetesimal. Fragments from the collision falling back on Mars surface and being thrown into a higher orbit around the Sun.
originally posted by: eManym
a reply to: TritonTaranis
Not convinced.
originally posted by: Whatthedoctorordered
originally posted by: Lightdhype
a reply to: Whatthedoctorordered
Still tho.. Similar geographic anomalies compared to what we have here on Earth are always interesting imo.
Seems to point to earth like conditions as far as erosion and the like goes in somewhat recent times.
Absolutely I thik its pretty neat to see so many similarities.
originally posted by: Gothmog
1) Picture stitching for the panorama
2) Flat mesa - exactly as the " doctor ordered"
The one pictured is in Venezuela and called a tepuis
Table Top Mesas