Mars dichotomy of the hemispheres

Mars dichotomy of the hemispheres.

The red color of the surface of Mars is attributed to an unusual amount of iron oxide, . No other planet is this been seen.  This speaks of a formation that is not conforming to Bórea, which means that it has a different origin as an asteroid from the Asteroid Belt. Mars shows a dichotomy in the crust: a division between the northern and southern plains a dense formation of craters. In the south there is a flat area (Hellas) that has the same average height as the north. The clear separation of these two zones may be indicative of slanting impact with Bórea, which received the impact material that was concentrated on one of the hemispheres (south) and not a severe impact that had fused with the Earth, as hypothesized by Theia. The southern hemisphere is raised by 1-4 km above the nominal level of the Martian geoid, while the northern hemisphere is relatively mild and below this level. In Martian geology, the division between these two hemispheres refers to the  dichotomy of the cortex,  characterized by prominent geological steeps. The low gravity of Mars makes it possible to lift the mountains and volcanoes (Mount Olympus-600 km of base and 18 km high, with respect to the surrounding plains, which makes it about 27 km higher than the northern plains and the largest volcano in the Solar System).  The analysis of the meteorite ALH84001, indicates that the Martian’s soil conditions in its earlier formation, were like Earth at that earlier time of formation.   

If the proposal related to the Borea body, which evolved within the Asteroid Belt, traveling in it in a spiral trajectory  before leaving it after the accretion of asteroids at its path, is correct, and with the consequent collision of the asteroid Mars, in a mild slant tangential collision, the dichotomy of the mars crust could be explained. A collision of this nature, left Mars with a good amount of ice and other “terrestrial” material that could only sit on one half of the planet, which we now see as the southern hemisphere, leaving the northern hemisphere with occasional traces of a slight bombardment as a consequence. This collision may account for the orbit inclination of Mars of 1.8 degrees with the plane of the ecliptic. On the edge of the south-north division, you can see the action of this collision, even leaving “channels” that would leave glacials cutting these in the terrain. The many rock formations due to the action of water/ice, similar to those found on Earth, corroborate a tangential collision. This recalls the skills we try to demonstrate by throwing a stone tangentially onto the surface of the water in a river or lake, making it “jump” over the surface. If we take a film with many frames (slow motion), we could see the water stick (or dampen) only a part of the stone, leaving of course, signs of the water on the back that is dry. An analogy with what could have happened on Mars.

Published by pkrumbein

Retired Physics/Astronomy teacher and instructor. Master in Physics Education and Master in Astronomy and Astrophysics. My interests are in reading and writing.

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