Cellar hole? - cross post

[AnnieF]

I posted this in my home state forum, MA, but it doesn't get much action so I'm posting a link here. Appreciate any help id'ing this rock structure.

http://www.treasurenet.com/forums/massachusetts/321534-cellar-hole.html

 

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[nhbenz]

Pretty hard to make out (my small screen doesn't help either). Some closer-up pictures would be of great help, and from different angles as well.

 

[Red James Cash]

cant quite make it out even with the picture enlarged