http://www.mikesastrophotos.com/baltimore-pa-meteor/lots-of-new-leads-and-hunters/ Astronomers look up meteorite hunters look down Thu, 09 Feb 2012 04:41:12 +0000 hourly 1 http://wordpress.org/?v=3.0.4 http://www.mikesastrophotos.com/baltimore-pa-meteor/lots-of-new-leads-and-hunters/comment-page-1/#comment-504 M. Riley Fri, 04 Sep 2009 14:09:29 +0000 http://www.mikesastrophotos.com/?p=1048#comment-504 My first thought looking at the rock is chert w/ limestone. Does the purple part of the rock break with a concoidial fracture (break like glass forming sharp edges?) You could also be seeing a weathering rind on a piece of limestone. Can you get a hardness for the purple mineral? Does the piece feel heavy for it's size? All of these things should help with ID. A better photo of the smaller rocks and a side shot of the main one could help. I am not too familier with the formations in the North East so I am just guessing from the photos. From looking at the geologic maps it could be Conestoga Formation - described as Light-gray, thin bedded, impure, contorted limestone. My first thought looking at the rock is chert w/ limestone. Does the purple part of the rock break with a concoidial fracture (break like glass forming sharp edges?) You could also be seeing a weathering rind on a piece of limestone. Can you get a hardness for the purple mineral? Does the piece feel heavy for it’s size? All of these things should help with ID. A better photo of the smaller rocks and a side shot of the main one could help. I am not too familier with the formations in the North East so I am just guessing from the photos. From looking at the geologic maps it could be Conestoga Formation – described as Light-gray, thin bedded, impure, contorted limestone.

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