Dry Dredgers Field Trip
September 28, 2013
Joint Picnic and Field Trip: Dry Dredgers and Kentucky Paleontological Sociey
Brookville, Indiana

Stop #1: Waynesville Formation

Our first stop was to a road cut that has not been visited by the Dry Dredgers in a very long time (April 2003). It became overgrown with vegetation and the best spots in the Arnheim Formation were no longer exposed. But today we found some good exposure higher-up on the road cut in the Waynesville formation. We found some Ft. Ancient facies, nicely weathered that was rich in Flexicalymene retrorsa trilobites.

Mike Bonar was the first to find a nice Flexicalymene just sitting above the weathered shale waiting to be rescued. Can you see it where he is pointing?

Above you see the side that was facing down in the mud. It is nicely preserved even though it's covered with dry mud in this picture. It should clean up nicely with plain water and a tooth brush.

Next, Rick Schrantz of the KPS found an enrolled Flexi, also sitting on top of the shale. Shown below with the pygidium (tail) in the mud, Rick reports it cleaned up easily.

from Stop #1 (Waynesville Fm.)

The most common brachiopod found on stop #1 was the Cincinnetina sp. previously called Onniella or Dalmanella. Shown in the next 5 photos, they were particularly abundant in the lower Waynesville Fm.

Not so common was the interesting brachiopod Leptaena richmondensis.

Some sites in the Cincinnatian are loaded with the brachiopod genera  Vinlandostrophia which has been referred to the new genus Vinlandostrophia by Zuykov and Harper (2007). However at stop #1, examples were less common. Here is an imperfect example of a single valve of Vinlandostrophia clarksvillensis.

Found in larger quantities at Stop#1 was the Sowerbyellid brachiopod Eochonetes clarksvillensis, formerly called Eochonetes clarksvillensis.

This group shot shows how common brachiopods are compared to other fauna on this site.

Among the inarticulate brachiopods, by far the most common was Petrocrania scabiosa.


One of the gastropod we saw on site #1 with preserved shell features was Cyclonema sp.

Most of the snails were internal molds.

We found good numbers in the Waynesville Formation of site#1 of the monoplacophoran Cyrtolites ornatus.(next 2 pictures).



Here's a nice crinoid holdfast from site #1.


The clam Ambonychia had a nice calcite preservation in the Waynesville of site #1. It showed the surface features of the specimens below.

Other Fossils

A nice example of what I think is what we call Tentaculites. It may actually be a Cornulitid, however.

Now lets see what we found at Stop #2.

Return to the September 2013 Field Trip Home.

See Previous Trips to these sites:

July 2011
March 2011
April 2006
March 2005

April 2003

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