Glyptocrinus Crinoid Calyx

This calyx fossil was found in the Waldron Shale of Clark County, Indiana.  It is somewhat worn but appears to be some sort of Glyptocrinus sp.  This crinoid existed in the Silurian Period. The white spots on the images are caused by light reflecting off pyrite crystals.

This last three illustrations Plate 13, figures 8-10 in the Indiana Department of Geology and Natural History (Eleventh Annual Report) from 1881.

Platyceras dumosum Snail Fossil

Platyceras dumosum (Conrad, 1840) snail fossil found in the Jeffersonville Limestone of Jefferson County, Kentucky USA.  Animal existed in Devonian Period.

Thanks to Kenny for the pictures and his nice prep work on this fossil.

Platystoma niagarensis Snail Fossil

All I can write about this fossil is... SWEET! Okay, I will embellish it a little more.

This snail fossil is interesting in that it has the matrix negative it can be removed from. Fossil is the Playstoma niagarensis found in the Waldron Shale of Clark County, Indiana.  This is a fairly large fossil for this locale measuring about 5.3 cm in diameter.  Near the inner whirl there might be remains of Cornulites attachments.  Needs further analysis with a magnifier.  Looking at other Waldron Shale fossils of this species, one sees worm tube attachments from time to time.

Kenny did the amazing prep work on this Silurian fossil using sand abrasive cleaning and the Air Scriber 8315B.