lil rocks with teeth ???????

[LSUWIL]

found these on a old railroad track looks like teeth , but could be a plant fossil dont know . just sounds cool when people thinks its dinosaur teeth 

[Tidgy's Dad]

Very pretty.

Cross-sections through crinoid stem pieces. 

[digit]

You can still tell your friends they are dinosaur teeth but you have to wink quite obviously.

 

Though these might look like fossilized zippers they are as stated above cross sections through the stem of an echinoderm known as a crinoid (aka 'sea lily'). The individual sections of the stem are called 'columnals' and can have very interesting designs including 5-pointed stars. Do an internet search for 'fossil crinoid' and you'll see lots of images which will make your pieces make more sense.

 

 

https://en.wikipedia.org/wiki/Crinoid

 

 

Cheers.

 

-Ken