west99 Posted November 9, 2009 Share Posted November 9, 2009 The mystery in question is the one that is slightly oblong/oval, with definitive lines crossing it.I could have put it up to being just some weird mud formation on the fossil, but there are 2 of them, almost exactly the same. Link to comment Share on other sites More sharing options...
west99 Posted November 9, 2009 Author Share Posted November 9, 2009 here is another view of the rock Link to comment Share on other sites More sharing options...
Nicholas Posted November 9, 2009 Share Posted November 9, 2009 That's a nice hash plate I see a lot of different species, as for the one oblong/oval item... I'm not sure but it appears to have calcite crystals within it... perhaps a internal mold of some sort? Link to comment Share on other sites More sharing options...
Auspex Posted November 9, 2009 Share Posted November 9, 2009 Looking at the margin, it looks like it might be an internal mold of...something. The "segments" are rather irregular, which makes me think they may be cracks in the in-fill material. What is the size? Neat "hash" plate, BTW. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
west99 Posted November 9, 2009 Author Share Posted November 9, 2009 Looking at the margin, it looks like it might be an internal mold of...something. The "segments" are rather irregular, which makes me think they may be cracks in the in-fill material. What is the size? Neat "hash" plate, BTW. There are actually two of the oblong fossils in the "Hash" (I'm new, getting used to the terminology), roughly 1.5 cm to 2 cm. Link to comment Share on other sites More sharing options...
west99 Posted November 10, 2009 Author Share Posted November 10, 2009 How about the body section of Trimerus? http://www.dcnr.state.pa.us/topogeo/collecting/images/p11_dev.gif Link to comment Share on other sites More sharing options...
Carl Posted November 10, 2009 Share Posted November 10, 2009 I vote for crinoid stem. If you look very closely at the junction of 2 segments, you see the zig-zag join which occurs as the radial grooves on the faces of individual columnals meet. Link to comment Share on other sites More sharing options...
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