PKripper Posted March 28 Share Posted March 28 The San Diego River flows through the county, from east to the west. The Mission Valley has all kinds of fossils...I am going to start releasing my collection...unfortunately so much development has destroyed some awesome stuff...I have a couple amphibious sturgeon looking specimens 6ftplus... Link to comment Share on other sites More sharing options...
Kane Posted March 28 Share Posted March 28 I'm not seeing anything definitively diagnostic to suggest tortoise or turtle here, but instead suggestively shaped/weathered limestone. 3 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 28 Share Posted March 28 Unfortunately, I agree. No bone texture. No bilateral symmetry. No turtle skeleton or skull morphology. Not seeing any fossil here. 1 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...
Brandy Cole Posted March 28 Share Posted March 28 Here is a chunk of fossil tortoise shell for comparison. You can see the internal porous texture on the right hand side. An incomplete piece of turtle shell will clearly have noticeably porous texture. Your piece lacks that feature, but I can see how the shape led you to shell as a possibility! 3 Link to comment Share on other sites More sharing options...
PKripper Posted March 28 Author Share Posted March 28 Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 28 Share Posted March 28 No similarities to bone at all. 1 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...
PKripper Posted March 28 Author Share Posted March 28 What would a turtle, a snake, lizard, and fish look like in the digestive track in a bigger predator 100million years ago... Thanks again everyone Link to comment Share on other sites More sharing options...
Kane Posted March 28 Share Posted March 28 If in the digestive tract of a predator, there would be clear evidence of fragmentary bone material. 2 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Ludwigia Posted March 28 Share Posted March 28 5 minutes ago, PKripper said: What would a turtle, a snake, lizard, and fish look like in the digestive track in a bigger predator 100million years ago... Thanks again everyone A lot different than it would today. You're welcome. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 28 Share Posted March 28 35 minutes ago, PKripper said: What would a turtle, a snake, lizard, and fish look like in the digestive track in a bigger predator 100million years ago... Thanks again everyone Not like the rock you've posted pictures of. 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...
rocket Posted March 28 Share Posted March 28 sometimes a natural break or surface is deceptive. You think it's a fossil, but unfortunately it's just a natural phenomenon. We have all experienced this as collectors, unfortunately it happens again and again I remember my last one..., uuuuuh, happy to say that it is long time ago 1 Link to comment Share on other sites More sharing options...
jpc Posted March 28 Share Posted March 28 As a guy who has collected a lot of fossil turtles, I agree with the others... no turtle here. Turtle fossils have very distinctive texture to the shell and you can generally see where separate bones of the shell are fused together. 1 1 Link to comment Share on other sites More sharing options...
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