fossil_lover_2277 Posted May 1, 2022 Share Posted May 1, 2022 (edited) Hi all, does anyone know anything about these echinoids? All are approximately 4-6cm in diameter. They came up with the sediments dredged at Holden beach. My best guess is they’re Eocene Castle Hayne since that formation is out towards the coast and is well known for its echinoids. Also, what’s the best way to clean these guys up? They’re in a lithified sand but with enough force you can sort of break some chunks of it off, so it’s not super resilient like some limestones. edit: I believe they’re Hardouinia spp., that’s what they look like online. Someone said they might be PeeDee, although I’ve not heard of lots of echinoids coming from the PeeDee, although some can, and they didn’t really say how they knew it was PeeDee vs Castle Hayne. Also I found a fish skull cap, it’s not sea robin, anyone possibly know what type of fish it’s from? Edited May 1, 2022 by fossil_lover_2277 2 Link to comment Share on other sites More sharing options...
Rockwood Posted May 1, 2022 Share Posted May 1, 2022 Sea Robin is the only skull cap I know of that is that dense. 1 Link to comment Share on other sites More sharing options...
fossil_lover_2277 Posted May 1, 2022 Author Share Posted May 1, 2022 (edited) 2 minutes ago, Rockwood said: Sea Robin is the only skull cap I know of that is that dense. A professional paleontologist told me it wasn’t sea robin. Didn’t know specifically what fish, not his specific area, but that it wasn’t sea robin. He sees a lot of those and ruled that out. Edited May 1, 2022 by fossil_lover_2277 Link to comment Share on other sites More sharing options...
Rockwood Posted May 1, 2022 Share Posted May 1, 2022 Fortunately we have folks here who know much more about it than I. 1 Link to comment Share on other sites More sharing options...
Al Dente Posted May 1, 2022 Share Posted May 1, 2022 The echinoids are Hardounia mortonis from the Peedee Formation. No idea on the other fossil. Maybe photos taken in sunlight will help bring out more detail. 2 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 1, 2022 Share Posted May 1, 2022 Cropped and brightened: 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...
hemipristis Posted May 1, 2022 Share Posted May 1, 2022 Resembles a neurocranium, but doesn't look like any of the ones that I'm familiar with. Very thick Definitely not a sea robin, They are thin, delicate, and highly ornamented (see below) 2 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
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