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Holden beach Echinoids and fish skull cap


fossil_lover_2277

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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?

E85D5608-0993-41C5-A2CE-4314A319F408.jpeg

AABF4D70-6DF6-4AE4-925C-C4759C31921D.jpeg

5C988305-620A-408A-AB46-E2B75719441C.jpeg

8B87BB7B-31DC-4E07-8D6A-9DC3B66DED50.jpeg

Edited by fossil_lover_2277
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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 by fossil_lover_2277
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:popcorn: Fortunately we have folks here who know much more about it than I.

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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.

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Cropped and brightened:

 

5C988305-620A-408A-AB46-E2B75719441C.jpeg.05a182a0d00d8d1d919d93b8ee287c49.jpeg

 

8B87BB7B-31DC-4E07-8D6A-9DC3B66DED50.jpeg.eca4f9db5ede9b02a42afbaa5c180fb7.jpeg

 

AABF4D70-6DF6-4AE4-925C-C4759C31921D.jpeg.19d7f6926bd60b22634067202fb3df73.jpeg

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    Tim    -  VETERAN SHALE SPLITTER

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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)

sea robin (1).jpeg

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'Those who cannot remember the past are condemned to repeat it.'

George Santayana

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