brachiomyback Posted August 2, 2010 Share Posted August 2, 2010 My six year old daughter found this "little gem" while we were searching for crinoid stems in the small wash gravel base of an Interstate 64 rest area playground in Illinois. I'm assuming it is from the Mississippian Period based on Illinois geology. Still trying to figure out the species but going to take a stab at it being a Brachythyris sp. It is smaller than the size of a dime and is mostly translucent, except of a small area by the hinge. It looks like it went through some type of mineralization? Any identification help and / or information on the unique patina would be greatly appreciated. enjoy... trip report to follow sometime.... Link to comment Share on other sites More sharing options...
MikeD Posted August 2, 2010 Share Posted August 2, 2010 It looks like it is preserved as calcite. Nice specimen. Can't help on the ID. Link to comment Share on other sites More sharing options...
PaleoRon Posted August 2, 2010 Share Posted August 2, 2010 That is an awesome specimen. It would look super in a display with a small fiber optic shining through it from behind. Link to comment Share on other sites More sharing options...
JohnJ Posted August 2, 2010 Share Posted August 2, 2010 Beautiful detail and cool preservation. She could have a whole new level of fun if you let her shine a laser pointer into it. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Nandomas Posted August 2, 2010 Share Posted August 2, 2010 (edited) My six year old daughter found this "little gem" while we were searching for crinoid stems in the small wash gravel base of an Interstate 64 rest area playground in Illinois. I'm assuming it is from the Mississippian Period based on Illinois geology. Still trying to figure out the species but going to take a stab at it being a Brachythyris sp. It is smaller than the size of a dime and is mostly translucent, except of a small area by the hinge. It looks like it went through some type of mineralization? Any identification help and / or information on the unique patina would be greatly appreciated. enjoy... trip report to follow sometime.... Very nice brachs... good rest stop on I 64 The first photos seem to be Cyclothyris sp Edited August 2, 2010 by Fossili Veraci Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
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