some unknown

[Gen. et sp. indet.]

Jurassic, flint, Kraków region, Poland, coin size=15,50mm

crinoid skeletal elements?

[Gen. et sp. indet.]

Jurassic, limestone, Kraków region, Poland, coin size=15,50mm

echinoid spine?

[Gen. et sp. indet.]

Jurassic, flint, Kraków region, Poland, coin size=15,50mm

brachiopod, bivalve? what genus?

[Gen. et sp. indet.]

Carboniferous, Upper Silesia, Poland

spores, seeds, arthropod infestation on a bark, leave?

 

[westcoast]

Your first images might be nautiloid not crinoid.  Third is probably brachiopod. I'm not sure that your final piece is organic. Interesting collection.

[EMP]

2 hours ago, Gen. et sp. indet. said:

Carboniferous, Upper Silesia, Poland

spores, seeds, arthropod infestation on a bark, leave?

 

 

I've found a lot of those in lower Mississippian rocks from the Pocono Group of Maryland. I think for the most part they are seeds from some kind of seed fern. 

 

Your other fossils look more like belemites than crinoids. 

[Gen. et sp. indet.]

Thank you for answers. If belemnites (phragmocones, I understand), why such an accumulation and no rostra?

[abyssunder]

This is a partial echinoid spine. Try to compare with these ones from the Zalas Quarry (southern part of the Polish Jura Chain), approx. 30km west of Kraków.

 

link to source

 

Your specimen looks to be a cidaroid spine, a large one, similar to Paracidaris laeviscula, described from the Zalas Quarry. More details in U. Radwanska. 2005. Callovian and Oxlordian echinoids ol Zalas. Volumina Jurassica 2005; 3 (1): 63-74

Edited April 20, 2017 by abyssunder

[jpc]

This collection looks just like the ones I get in Switzerland....

[Gen. et sp. indet.]

Thanks all!

[klenkes4711]

Hi,

the Jurassic brachiopod in flint could be a Dictyothyropsis? guembeli (Oppel 1866) (Oxford-Kimmeridge).

Cheers, Juergen

[Gen. et sp. indet.]

thank you!