DPS Ammonite Posted February 18, 2015 Share Posted February 18, 2015 What is this fossil from the late Miocene Briones Formation, (or adjacent late Miocene formations), from the San Francisco Bay area in California? Fossil is 8 cm long and 7cm wide and 4cm thick. The Briones Fm. is marine. I see bilateral symmetry. Could it be a skull? My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
NSRhunter Posted February 18, 2015 Share Posted February 18, 2015 Looks like skull/cranial elements to me! Can't help on ID but nice find! Link to comment Share on other sites More sharing options...
Dave pom Allen Posted February 18, 2015 Share Posted February 18, 2015 looks very fishy Link to comment Share on other sites More sharing options...
finderskeepers Posted February 18, 2015 Share Posted February 18, 2015 yeap I agree with NRS king, looks like portions of a skull to me, maybe a fish. Link to comment Share on other sites More sharing options...
DPS Ammonite Posted February 18, 2015 Author Share Posted February 18, 2015 Does the upper right hand photo show where the skull attached to the vertebral column? My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
finderskeepers Posted February 18, 2015 Share Posted February 18, 2015 I found something on http://www.sheppeyfossils.com/pages/fish_new_to_science.htm. It's a photo of skull elements of a fish fossil but might give you some ideas...It would be cool to see whatever you have there prepped, might even be worth showing to a California museum curator. Impressive fossil ! Link to comment Share on other sites More sharing options...
DPS Ammonite Posted February 18, 2015 Author Share Posted February 18, 2015 I did take it to UC Berkeley to show to a paleontologist. He also thought that it might be a fish. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Boesse Posted February 18, 2015 Share Posted February 18, 2015 There's not exactly much known from the Briones Formation - it does look like a teleost. Keep looking at the same locality - the first Desmostylus tooth (described by O.C. Marsh in the 1880's) was collected from the Briones east of Hayward; scattered desmotylian, cetacean, and shark/ray specimens have been found. 1 Link to comment Share on other sites More sharing options...
JustPlainPetrified Posted February 18, 2015 Share Posted February 18, 2015 Very neat find! Link to comment Share on other sites More sharing options...
jpc Posted February 19, 2015 Share Posted February 19, 2015 It is a turtle egg. Just kidding... I also see fish skull. Link to comment Share on other sites More sharing options...
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