Poc marks, even landscapes get them

in science •  5 years ago  (edited)

These are features of ice bound regions and permafrost.

Some speculated that these on the coast of the US are giant snowball splashes from a cometary impact with an ancient ice sheet but new ones are being formed currently in active ice fields dashing that theorey.

snipped from here:

Authors get paid when people like you upvote their post.
If you enjoyed what you read here, create your account today and start earning FREE STEEM!