Mars Geology- some slingshot thoughts-

Exploring Google today I came across GoogleMars. Within seconds I was completely lost in this world... And after staring at the map I have keyed in on these things:

• First, there are fewer impact craters in the north hemisphere;

• Second, there was an obvious liquid event;

• Third, the water event 'washed out' most of the craters in the northern hemisphere;

• Four, few craters in the 'volcanic' region; which means the volcanoes occurred after the impacts.

• All the liquid originated from the Zero-1 km depth (yellow-to green) and lower.
• The liquid had higher velocity below
  
  3 km. as evidenced by the development of 'dune' directions/lineation in the blue, but craters are still present in the greens.
• I'm also wondering if we can start to make assumptions of rock composition based on crater impacts, in that, some craters form with a center point while others do not. And that the similar types are adjacent. Large Scale thought.

Further thoughts are in the mixer but need to compose the thought some more before posting it. I found that 1-WORLD-GLOBES has totally excellent 3-d scale globes of Mars and Earth for sale.

Anyone wanna buy me one?