Dry Dredgers Field Trip
May 26, 2007
Hueston Woods, Ohio
Brachiopods
Except for some of the common brachiopods also found at the
first site, the second site had a lot more Leptaena
richmondensis. Here are some pics of rocks covered with them.
Shown close up in the photos below, Leptaena
richmondensis has wavy wrinkles with radial lines intersecting them.
It's pretty interesting and different.
On the "pavements" of Leptaena richmondensis,
you would find most of them concave side down. A few are single valves and the
inside of the bottom valve is facing up. This shows the diagnostic muscle scars
on the brachial valve as seen in the next photo.
Some Leptaena on the rocks were concave side up.
Some of these showed the inside surface of the pedicle valve, such as in the
picture below. The pedicle opening is filled in with matrix.
There were tons of Rafinesquina
on the rocks at the Acton Lake Dam site. Many of them showed signs of storm
events, with the Rafinesquina "shingled" and shuffled up
in all directions. Here's a picture of one example with a close-up in the second
photo.
Coral
We only found the large, solitary Horn Coral, Grewingkia, on
this second site. Field Trip Chair, Bob Bross, promised us a bonanza of Horn
Coral. We did find more than at the first site. But I think there was still too
much water in the spillway and fisherpeople were concentrated in this area. They
probably picked up these easy-to-spot specimens over time.
Bryozoans
YES! Fantastic bryozoans were
found here as is true EVERYWHERE in the Cincinnatian. Here are my take-homes to
prove it.
Thanks for sticking with me. That's it for this field trip. Check out the photos of the Sept 2007 trip to St. Leon, Indiana.
T A B L E O F C O N T E N T S
Site 1
Page 1: Introduction to Trip
Page 2: Collecting at Site 1
Page 3: More Collecting at Site 1
Page 4: Fossils Found at Site 1
Site 2
Page 5: Collecting at Site 2
Page 6: Fossils Found at Site 2: Bivalves, Trilobites, Gastropods and
Cephalopods
Page 7: Fossils Found at Site 2: Brachiopods, Coral and Bryozoans