Halysites or Chain Coral

Here is a piece of chain coral or Halysites seen at the last KYANA fossil study. It was probably from a field trip taken to a Sellersburg, Indiana quarry in July/August 2008.

These creatures were probably from the Silurian period.

Crinoid Graveyard Piece

Here is a rock slab I saw at the last KYANA fossil study session. It was probably at least 30 cm long and full of broken crinoid stems.

I saw in the KYANA display case something like this and it was called a graveyard rock.

It looks like crinoids seen at Lake Cumberland so I would say this is Mississippian period, just a guess. :)

Spiny Snail: Platyceras dumosum?

Here is another spiny snail found during a geology society field trip in July to a Sellersburg quarry (I think). It is embedded very well in a rock but it probably is a Platyceras dumosum from the Devonian period.