Blam didn’t you post on this before?
As noted above, I didn’t vet this one sufficiently before posting it. :’)
Underwater Archaeologists Find Possible Mastodon Carving On Lake Michigan Rock
AHN | 9-4-2007 | Nidhi Sharma
Posted on 09/05/2007 10:26:08 AM PDT by blam
http://www.freerepublic.com/focus/f-news/1891549/posts
Stonehenge Beneath the Waters of Lake Michigan
BLDG Blog | 05 Jan 2009 | BLDG Blog
Posted on 01/08/2009 12:15:48 PM PST by BGHater
http://www.freerepublic.com/focus/f-chat/2161114/posts
Stonehenge in Lake Michigan?
(Potentially pre-historic stone formation discovered deep underwater)
nbcchicago.com | January 8, 2009 | Matt Bartosik
Posted on 01/13/2009 5:24:22 PM PST by Free ThinkerNY
http://www.freerepublic.com/focus/f-chat/2164112/posts