Idelond Posted May 5, 2021 Share Posted May 5, 2021 Hey y'all.... Another piece from Peace River, Florida... Is this a fossil or a rock??? Is very heavy and dense... Thank u all for ur time Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 5, 2021 Share Posted May 5, 2021 Dugong rib section, is my thought. 3 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted May 5, 2021 Share Posted May 5, 2021 I agree with Tim, a section of dugong rib. Link to comment Share on other sites More sharing options...
Idelond Posted May 5, 2021 Author Share Posted May 5, 2021 Thanks everyone.... I thought it was dugong rib too from my books.... But wanted to make sure cause it's so heavy and dense... Thank u all again for ur time... Check out my other posts for more pieces from Peace River, Florida.... =) Link to comment Share on other sites More sharing options...
Mahnmut Posted May 5, 2021 Share Posted May 5, 2021 Hi Idelond, being heavy and dense is typical for dugong ribs, they do not have the spongiosa-filled core of most mammal ribs. That helps the animal staying submerged in spite of all the fat that would make it float otherwise. Its called https://en.wikipedia.org/wiki/Pachyosteosclerosis and a very useful marker for aquatically adapted animals. Getting fossilized increases the density in most cases, so a fossil dugong rib is as dense as your average stone, a non fossil one not that much lighter. Best Regards, J 1 Try to learn something about everything and everything about something Thomas Henry Huxley Link to comment Share on other sites More sharing options...
Idelond Posted May 5, 2021 Author Share Posted May 5, 2021 24 minutes ago, Mahnmut said: Hi Idelond, being heavy and dense is typical for dugong ribs, they do not have the spongiosa-filled core of most mammal ribs. That helps the animal staying submerged in spite of all the fat that would make it float otherwise. Its called https://en.wikipedia.org/wiki/Pachyosteosclerosis and a very useful marker for aquatically adapted animals. Getting fossilized increases the density in most cases, so a fossil dugong rib is as dense as your average stone, a non fossil one not that much lighter. Best Regards, J Thank u..... I'm new to fossils but I Love it.... I just learned something new... Actually I have two more pieces that now I'm almost sure is dugong ribs... =) Link to comment Share on other sites More sharing options...
Rockwood Posted May 5, 2021 Share Posted May 5, 2021 Cetacean ribs are similar, but tend to be heavier on the ventral side of the animal. Link to comment Share on other sites More sharing options...
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