GordonC Posted October 21, 2015 Share Posted October 21, 2015 This just from the Manlius Thatcher member (in the Helderberg Group) near Port Jervis NY. I'll call it a stromatoporoid, see the side view of the finely striated specimen. The top view shows scattered pores, a couple near the edge can be seen to pass through the stromatoporoid. (The pores are not attacked by muriatic acid and so are thought to be of silica.) The bottom of the piece contains a layer of the pore material , also seen in the side view. I'm surmising that the pores and the stromatoporoid are different organisms. If so it appears that this stromatoporoid host grew on top of a similar assemblage. (Standard size paper clip in photos). ID or comments please. Link to comment Share on other sites More sharing options...
Herb Posted October 22, 2015 Share Posted October 22, 2015 sounds right "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
ZiggieCie Posted October 22, 2015 Share Posted October 22, 2015 THX for sharing. Link to comment Share on other sites More sharing options...
Rockwood Posted October 22, 2015 Share Posted October 22, 2015 Are you sure it has no reaction to acid, or could it be a less vigorous reaction ? My thought is that dolomitization would perhaps be less likely to fill holes (essentially mold fossils) than silica. Link to comment Share on other sites More sharing options...
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