Dry Dredgers Field Trip
September 23, 2006
Southeast Indiana

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Crinoids Found

No crinoid heads (calyx) were found and no bottoms (holdfasts) either. Here's one Dry Dredger's hand full of cinoid stems, though. 

Ichnofossils (Trace Fossils) Found

In the trace fossil category, nothing exciting to report. There were lots of worm burrows as this next picture shows.

This next fossil arrived to my camera from two separate Dry Dredgers members, at separate times. It looked really interesting and was irresistible to pick up, and then put down. This is a vertical cross section of a rock, showing all the layers of a thick section of strata. This is the type of lithographic specimen geologists photograph to document stratigraphic layers.  Near the top, you can see a Bryozoan, as it encrusted the surface of the Ordovician Ocean floor. Below it are some holes, perhaps made by soft bodied worms, that may have been widespread at that time. Each layer in this rock represents a time in the history of this locality. Our scientist instincts compelled us to pick it up and learn from it.

Here's an example of a horizontal surface bored by lots of soft bodied animals.

Minerals Found

Among the minerals found was burrows filled in with Pyrite, "fools gold". These little nuggets shined when wet, making them attractive to pick up.

That's all for this month. Join us in person for the October field trip on Oct 28th! If you are not a member but would like to come along, email Bill Heimbrock at billheim@cinci.rr.com

T A B L E    O F    C O N T E N T S

Page 1: The Site and Collecting Photos
Page 2: Fossils Found: Cephalopods

Page 3: Fossils Found: Trilobite Flexicalymene

Page 4: Fossils Found: Trilobite Isotelus

Page 5: Fossils Found: Articulate Brachiopods

Page 6: Fossils Found: Inarticulate Brachiopods and Corals

Page 7:  Pelecypods and Gastropods

Page 8: Fossils Found: Crinoids and Ichnofossils

Previous Trips to this Site

March 2006
March 2004

October 2003

April 2002

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