Limestone Posted July 18, 2017 Share Posted July 18, 2017 Hello, found this in a river in northern Puerto Rico in the Lares Formation - middle to upper Oligocene Link to comment Share on other sites More sharing options...
Miocene_Mason Posted July 18, 2017 Share Posted July 18, 2017 Serpulid worm tube? 2 “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
abyssunder Posted July 18, 2017 Share Posted July 18, 2017 It looks to me like an infilled Kuphus (teredinid bivalve) tube. picture from here 4 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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