Any clue????

Mythikalfairy74

Greenie
Mar 3, 2020
19
21
Central Valley Ca
Detector(s) used
None
Primary Interest:
All Treasure Hunting
I found this on a job site in. It was a power plant in Taylor, Az. During lunch one day in the parking lot (all gravel & Rocks) I originally thought it was a dried up 🥕. Lol. But when I kicked at it, I noticed it was much heavier than a dried carrot would be. So I picked it up. To my amazement, I notice a crystal type mineral through the entire center. This isn't a huge rock. I didn't measure it but if I had to guess, it might be 1/2 inch on one side and 1/4 inch on the other , maybe the crystals/or something clear is maybe 1/2 inch long. I am not great at measurements 😬. I've searched all over online and can't find anything close to it. To even get an idea. Hopefully. Picture_20201302091339.jpgPicture_20205002085036.jpgPicture_20201402091413.jpgPicture_20201402091458.jpgPicture_20204202084247.jpg
 

Crinoid Star Stem Fossil

"The stem typically consisted of disc-like plates (columnals) stacked on top of each other. Individual columnals were rounded, elliptical, square, pentagonal or stellate, and some plates were decorated with petal-like designs."

Crinoid star.jpg
 

Upvote 0
Wow. Thank you. That would make this my coolest find. I usually only rock hunt in the Stanislaus river in California. Well any body of water that is shallow. So the completely solid crystal core would be???? Part of the creature? Where would I be able to get it checked out and maybe aged ( type of place, not specifically? I'm very excited now. Even if it isn't worth a dime I'd be ecstatic :)
 

Upvote 0
Definitely crinoid, the crystal center was formed later when they filled the cavity in the middle of the fossil
 

Upvote 0
Crinoid columnal for sure. Despite their plant-like appearance and the colloquial name "sea lillies", they're marine animals distantly related to starfish and sea urchins. With respect to age, the most likely deposits yielding crinoid fossils nearest to Taylor would be the Redwall limestones or Naco Limestones of the Mogollon Rim. Those deposits are respectively Mississipian (approx. 358.9 to 323.2 million years old) and Pennsylvanian (approx. 323.2 to 298.9 million years old).
 

Upvote 0
I am overwhelmed with the quick and educational replies. Also the funny ones. Luck isn't always on my side. But in this case I guess I am lucky. I would love to know if with the crystal if it's a one of a kind. In any case, I love it! Joining this forum was a great decision and I look forward to seeing and posting interesting finds!
 

Upvote 0
Welcome to the forum! You will find a whole lot of people with tons of knowledge on just about any subject being discussed on this forum. I'm not one of those people.
 

Upvote 0
It always amazes me what the people on this site can identify!
 

Upvote 0
Lol does look like a tooth my first thought lol. Good I'd guys. Cool find
 

Upvote 0
Can anyone take a look at my photos I added and tell me if they can identify any? I am planning to join our local rock and mineral society. But my first meeting won't be until second Sunday of next month, Corona virus providing. UGH.
 

Upvote 0
#3, #8, #9 all correct. Crinoid stem section with quartz. Very nice fossil.

Note the piece in the low center of the below image has the similar "star" center channel your shows.

HTB1tR9cLXXXXXcGXFXXq6xXFXXXY.jpg_350x350.jpg
 

Last edited:
Upvote 0
It's from the section of the animal labelled as the 'columnal' in the picture below.

Crinoid Anatomy.jpg

The segment lengths vary according to species and, as fossils, often break at that weak point to give disks or short cylinders with a hole running though the middle. The sections themselves are sometimes star-shaped (or round) and the hole may also be star-shaped (or round). When it fossilises, the hole may or may not fill with minerals that are different to the minerals that replace the structure itself. Depends on the geological conditions. Note also these animals have 'pentameral' symmetry and so, if a star is seen, it has five points like other echinoderm animals to which it is related, such as the starfish.
 

Upvote 0

Top Member Reactions

Users who are viewing this thread

Latest Discussions

Back
Top