🔎 UNIDENTIFIED I got a rock!

[CoilyGirl]

I got a rock !

 

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[pepperj]

I got a rock !

Fossil?
Cute little one at that.

 

[Red-Coat]

Nice. You have an echinoderm fossil. I believe it's a crinoid 'bulb'.

 

[CoilyGirl]

I got a rock !

I have no idea what this is. One person said sand dollar fossil but I don’t think so. Help pretty please and Happy New Year!

Nice. You have an echinoderm fossil. I believe it's a crinoid 'bulb'.

Thank you for the response Red-Coat, I can’t wait to tell my friend!

 

[CoilyGirl]

Fossil?
Cute little one at that.

Yes it is very cute!

 

[Red-Coat]

I have no idea what this is. One person said sand dollar fossil but I don’t think so. Help pretty please and Happy New Year!

Thank you for the response Red-Coat, I can’t wait to tell my friend!

You're welcome. The correct term for the 'bulb' is a 'lobolith'. It's a flotation device for free-swimming crinoids. Although often called 'sea lilies' for their resemblance to plants, they're marine animals loosely related to starfish and sea urchins.

Crinoids first appear in the fossil record during the Ordovician period around 480 million years ago but they're not extinct today (although they did suffer an extinction event), so could be from that time onwards. The youngest known crinoid fossils are from the Rhaetian (Late Triassic) of Iran and date to a little older than 200 million years.

 

[Mine Shaft]

My Crinoids look different then that lol. All of my Crinoides came from a bluff just above Bullhead City AZ.

 

[CoilyGirl]

You're welcome. The correct term for the 'bulb' is a 'lobolith'. It's a flotation device for free-swimming crinoids. Although often called 'sea lilies' for their resemblance to plants, they're marine animals loosely related to starfish and sea urchins.

Crinoids first appear in the fossil record during the Ordovician period around 480 million years ago but they're not extinct today (although they did suffer an extinction event), so could be from that time onwards. The youngest known crinoid fossils are from the Rhaetian (Late Triassic) of Iran and date to a little older than 200 million years.

I have found out that what my friend’s friend found was a crinoid calyx. Picture at top of my leading post. Thanks friends!

I got a rock !

 

[pepperj]

I have found out that what my friend’s friend found was a crinoid calyx

I am told it’s a crinoid calyx and I believe it!

Well congratulations on finding a cute cringed calyx.
(Personally I will remember it as a cute little rock-easier at my age)😁

 

[Red-Coat]

My Crinoids look different then that lol. All of my Crinoides came from a bluff just above Bullhead City AZ.

Lots of different types, but two main groups: free-swimming and immobile. I am guessing you're finding the latter, and principally the 'stem' (columnal) segments which free-swimming forms don't have (see below).

I have found out that what my friend’s friend found was a crinoid calyx. Picture at top of my leading post. Thanks friends!

I don't believe so. The morphology looks to me like the lobolith of a free-swimming species, not the calyx (aboral cup) of an immobile species:

Immobile:

[William I. Ausich, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0>, via Wikimedia Commons]

Free-Swimming:

[Picture by glaciergary]

EIther way, it's a nicely-preserved specimen.

 

[Mine Shaft]

@Red-Coat Yep the ones I have are from the Stem segment Columnal, also some other weird looking animals mixed in. I will post some pic's after bit. A lot of my fossils have hundreds of ditto in them ........... ......... ...........

 

[Rooster1694]

I got a rock !

LOL

 

[invent4hir]

CoilyGirl, what a fascinating "rock". Red-Coat, you never cease to amaze!

 

[Mine Shaft]

Hi @CoilyGirl would it be ok if I post some fossils pic's ? Thank you.