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
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
Found in larger quantities at Stop#1 was the Sowerbyellid
clarksvillensis, formerly called
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
One of the gastropod we saw on site #1 with preserved shell
features was Cyclonema
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
Here's a nice crinoid
The clam Ambonychia had a nice
calcite preservation in the Waynesville of site #1. It showed the surface
features of the specimens below.
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:
Back to the Field Trip Index Page
Return to Dry Dredgers Home Page
The Dry Dredgers and individual contributors reserve the
rights to all information, images, and content presented here. Permission to
reproduce in any fashion, must be requested in writing to email@example.com.
www.drydredgers.org is designed and maintained by Bill Heimbrock.