Mr Andrew

I have to totally disagree with you. The probability that all of these abnormalities were formed in nearly exactly the same shape and lain out in exactly the same direction is almost zero if you are saying that they are simply sink hole bogs.

I also see on here where some are calling them hills. All you have to do is do an altitude check to see that the center of the formations has a lower altitude than that of its surroundings. There also seems to be a slight increase in altitude on the south eastern rims indicating that a angled impact could have created buildup on one side.

This is definately something worth investigating even on the ameteur level.

Lets not forget, these formations are seen in canada, russia, and areas of africa.