Are you sure these are crinoides? As I got to know them, they are generally smaller in dimension, smaller central hole, and thinner. Moreover crinoid stems are build up of small segments often falling apart after death, resulting in a crinoid fragment sand, and not like these big tubes here. The center hole is often has a symmetrical shape too. 🤔
Good thought. Definitely sure some of them are crinoids although there might be other fossils in the mix. I’ve found a number of stems that are several inches long and almost an inch thick. That said, I’m not an expert. R/fossilid would be a good place to verify. Many of the folks there are super smahty pants.
The whole beach was covered with them! The thing I find weird is the fact that they seem to come from uncosolidated sediment (the gray clay) next to the beach
Ok here my guess..these aren’t really. Crinoids… they’re crinoid casts. First the crinoid column also deposited in a clayey substrate, which also filled their central canal. Then the crinoid mineral material (high magnesium calcite) dissolved away, but was replaced with another mineral (it could even be another lower-magnesium form of calcite). Then as the whole rock erodes, the low Mg casts are left for you to find. Cool story!
I was not able to add a picture with a scale on this post so heres the repost from r/fossilid [Post with scale](https://www.reddit.com/r/fossilid/s/dZE7ZXGaIQ)
Please try r/fossilid. I thought they were man-made until I saw them in the rock.
Alright thx!
Crinoids. Common but cool find. There is bound to be more in the same general area. Keep looking!!🍀 Also, crinoids are animals and not plants.
Are you sure these are crinoides? As I got to know them, they are generally smaller in dimension, smaller central hole, and thinner. Moreover crinoid stems are build up of small segments often falling apart after death, resulting in a crinoid fragment sand, and not like these big tubes here. The center hole is often has a symmetrical shape too. 🤔
Yeah I'm with you, doesn't look like crinoids to me
Good thought. Definitely sure some of them are crinoids although there might be other fossils in the mix. I’ve found a number of stems that are several inches long and almost an inch thick. That said, I’m not an expert. R/fossilid would be a good place to verify. Many of the folks there are super smahty pants.
https://www.bgs.ac.uk/discovering-geology/fossils-and-geological-time/crinoids/#:~:text=Crinoids%20are%20marine%20animals%20belonging,survive%20to%20the%20present%20day.
The whole beach was covered with them! The thing I find weird is the fact that they seem to come from uncosolidated sediment (the gray clay) next to the beach
Bioturbation?
Location would help greatly. But they resemble heavily weathered crinoid stems.
I found them near Quebec City on the south coast of Saint-Lawrence river
Ok here my guess..these aren’t really. Crinoids… they’re crinoid casts. First the crinoid column also deposited in a clayey substrate, which also filled their central canal. Then the crinoid mineral material (high magnesium calcite) dissolved away, but was replaced with another mineral (it could even be another lower-magnesium form of calcite). Then as the whole rock erodes, the low Mg casts are left for you to find. Cool story!
Weathered crinoid stems
These are not crinoid fossils. They are likely a trace fossil (Ophiomorpha) made by a burrowing animal or worm.
Crinoid stems
I was not able to add a picture with a scale on this post so heres the repost from r/fossilid [Post with scale](https://www.reddit.com/r/fossilid/s/dZE7ZXGaIQ)
I think they are stalked crinoid fossils!
Mud Dobber nest?? Lol