Unidentified Silurian Clam

This unidentified clam fossil found in the Waldron Shale of Clark County, Indiana.  The fossil is about 1 cm wide and 1.5 cm long. Fossil is from the Silurian Period. This is only the second type of clam I have found so far.

Clam fossil embedded in some pyrite crystals.

[UPDATE: This fossil also looks like a Rochester Shale brachiopod found by the group at Primitive Worlds that shows up as Unidentified identification #11 on page 41 of their book.

My calling this fossil a clam has to do with the shell being asymmetric.  Maybe this specimen has been deformed over time by geologic forces.  One way for me to find out is to find another one.]

Ammonite Fossil From Drügendorf

Unidentified ammonite fossil from Drügendorf, Germany of the Jurassic period (Kimmeridgian).  It is currently be prepped as you can see the air scribe marks on the internal whirl.  Thanks to Dave of Views of the Mahantango for this fossil.  Also thanks to Kenny for letting me photograph the fossil on his work table, he is still working on prepping.  I believe the marks will be air blasted smooth on the fossil surface next.

A new prep tool was used to help clear the excess matrix called Air Scriber 8315B with carbide stylus.

Rhipidomella hybrida Brachiopod

A well preserved fossilized shell half of a Rhipidomella hybrida brachiopod of the family Rhipidomellidae named by Schuchert in 1913.  The genus Rhipidomella named by Ochlert in 1890 and the species hybrida named by Sowerby.

This specimen is the only one I have found in the Middle Silurian period Waldron Shale of Clark County, Indiana.

Rhipidomella hybrida illustration

The Silurian Fauna of Kentucky

by August F. Foerste

Plate XXIII Figure 18

This brachiopod might be similar to the Dalejina hybrida (Dalejina = Mendacella) in the Rochester Shale of New York.