BillC Posted November 24, 2018 Share Posted November 24, 2018 All-- I'm newer than new, but I've been here before and received great help. Will you please help again? I found this approximately 4.5" x 4.5" (11.4 cm x 11.4 cm) piece in a creek bed (Spring Creek; altitude ~700 ft [213 meters] above sea level) in south-central Missouri about 26 miles north of the Arkansas border. (Very near Rockbridge, MO.) I THINK it is either a coral or a sponge and hope I haven't already misidentified it! Thank you for helping this total novice. --Bill Link to comment Share on other sites More sharing options...
JohnBrewer Posted November 24, 2018 Share Posted November 24, 2018 Can’t help but welcome to the forum John Map of UK fossil sites Link to comment Share on other sites More sharing options...
FranzBernhard Posted November 24, 2018 Share Posted November 24, 2018 Hm, I may be totally wrong, but to me this looks like a piece of tufa. Its a calcium carbonate precipitate formed in spring outflows, in some creeks etc. It can be deposited around organic material (pine needles etc), maybe with the help of bacteria or algae. But it is not a fossil. There is a nice wikipedia entry: https://en.wikipedia.org/wiki/Tufa Franz Bernhard 5 Link to comment Share on other sites More sharing options...
Bronzviking Posted November 25, 2018 Share Posted November 25, 2018 I'm pretty familiar with coral and it's not coral. I agree it's some variety of limestone. Link to comment Share on other sites More sharing options...
BillC Posted November 25, 2018 Author Share Posted November 25, 2018 All-- Thank you, once again, for all the help! --Bill Link to comment Share on other sites More sharing options...
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