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Post by archimedes on Feb 11, 2011 21:01:12 GMT -5
Cross section of a Sponge Astylospongia praemorsa from the Middle Silurian Brownsport Group Tennessee I hope yuo like it Joe B. Attachments:
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Post by Joe Botting on Feb 11, 2011 21:44:37 GMT -5
Ooh, I like indeed! Thanks, Archimedes. ;D
A lot of lithistids are quite badly recrystallised inside, but this one does show the canals leading to the osculum rather well. I must confess I've never really done much with lithistids, as they're mostly restricted to the Baltica-North America region and a few other places like the Argentine Precordillera - we get very few in Wales, and only the weird spherical pandemic things like Hindia. (My ones tend to come in the form of a scattered mess of spicules in black shale...) Silurian sponge faunas are even more restricted - it's amazing how little there is known outside Laurentia!
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Post by archimedes on Feb 13, 2011 17:51:34 GMT -5
The Brownsport Group of Tenn. has many exceptional sponges, the sites are famous for their sponges. Hindia are very common, the most common, but many other spieces also occur, Astylospongia praemorsa being one of the more common types. I also find all types of invertabrate, my favorite is an echinoderm Troostocrinus.
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Post by archimedes on Feb 13, 2011 19:32:09 GMT -5
Paleomanon cretera Attachments:
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