Dry Dredgers Field Trip
March 24, 2007
AA Highway, Northern Kentucky

Photos by Bill Heimbrock, Mike Bonar and Cindy Striley. Words by Bill Heimbrock


Unlike many sites further up in the Cincinnatian strata, this Kope site did not have a lot of Brachiopods. It did have huge quantities of two brachiopods, Cincinnetina multisecta (pictured below) and Sowerbyella rugosa (not pictured).

However, as we rose toward the Fairview, we began seeing a few specimens of the large Brachiopod, Rafinesquina.

Among the inarticulate Brachiopods, we saw these proud Brachs resorting to having attachments with common Bryozoans!



Yes! We found quite a few good quality trilobites, all of the variety Flexicalymene and presumably most of them were of the species, granulosa. Here are some pics.
P1010035.jpg P1010038.jpg P1010041.jpgP1010117.jpg P1010118.jpg


Sadly, all we saw of the majestic trilobite, Isotelus, were fragments. Here's a nice one, so you don't have withdraw symptoms.


Every Cincinnatian fossil site with shale has trace fossils. Although I was surprised how much of the shale had weathered away. It is a relatively new site, but it was almost all harder fossil compactions. Still we did find trace fossils. Here is a picture of some "dumbbell fossils" called Diplocraterian I saw. These are worm burrows and sometimes, where they dug into the mud,  make holes at either end of their trace. This can turn into "U" shaped burrows.

Another shale shape that sparked excitement for one member, was this discolored shale that looked strikingly like an Isotelus trilobite about to come to the surface. It was a lens-shaped object with cross ridges that looked like trilobite thorax segments (more than 8, which would rule out Isotelus). Next to it was another lens shape, sparking more excitement.

It's likely the mystery was solved though, when we found other cases in the shale, with this same ridged or cuped pattern. Still exciting though, it is the impression of the bottom of the Ordovician Ocean floor. A look back in time at the wave action 450 million years ago!

That's all we've got for this field trip. Thanks to Mike Bonar and Cindy Striley for additional Photos.

Join us for our next field trip on April 28, 2007

T A B L E    O F    C O N T E N T S

Page 1: The Site and Fossil Hunters
Page 2: Fossils Found That Day: Best Finds - Echinoderms

Page 3: Fossils Found: Cephalopods, Bryozoans and Worm Tubes

Page 4: Fossils Found: Brachiopods, Trilobites and Ichnofossils

Previous Trips to the AA Highway

October 2005
October 2002

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