NOYFBAH
5232
50
3
Sep 12, 2021 7:25 AM
NOYFBAH
5232
50
3
PeterTried
That’s clearly fossilized mac and cheese.
dwolvin
That's right you fabulous little fossils...
Esdog
Lick it.
lucidity4all
I love finding crinoids. I used to do it in Michigan. This is a cool anti cluster, thing
NOYFBAH
I've found them in South Dakota and Arkansas. So far anyway.
venomlash
Echinoderms like crinoids have skeletal plates that are crystallographically single crystals, so they develop a "syntaxial cement" quickly
venomlash
after burial, and become resistant to alteration by mineral-rich groundwater. If groundwater then converts the rock to agate, the crinoids
venomlash
might stay calcitic because they're hard to alter. And because calcite is softer and more vulnerable to mild acid than agate is, when the
venomlash
rock is eroded near the surface the crinoids will preferentially weather out, leaving detailed impressions behind.
NOYFBAH
Nice!