allanstaib Posted April 3, 2016 Share Posted April 3, 2016 Really enjoying participating in this forum! I've found this object in the Cotter/Jefferson City formation in Marion County Arkansas (Ozarks). At the widest point it is 27mm in diameter. From photos of other similar fossils from the early Ordovician it looks like a coiled cephalopod but seems to have a smoother shell than other examples I've seen. The rock structure is really interesting; a real chaotic aggregate. Thanks for any comments! Link to comment Share on other sites More sharing options...
sdsnl Posted April 3, 2016 Share Posted April 3, 2016 Nautiloid? Link to comment Share on other sites More sharing options...
michele 1937 Posted April 3, 2016 Share Posted April 3, 2016 Nautiloid? Gasteropodo ? Link to comment Share on other sites More sharing options...
minnbuckeye Posted April 3, 2016 Share Posted April 3, 2016 (edited) Liospira or similar type gastropod impression?? Edited April 3, 2016 by minnbuckeye Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 3, 2016 Share Posted April 3, 2016 (edited) I agree with gastropod - possibly Ceratopea. Another LINK. The rock matrix looks like chert, which is fairly abundant in the formations you mention. "The fossils known from the Cotter Dolomite are rare, but include gastropods, cephalopods, and reef-building algae." Regards, Edited April 3, 2016 by Fossildude19 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...
.thumb.jpg.51c371f10936bbc883322324e44cc518.jpg)
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now