Bill Heimbrock

You are welcome to have any of my fossils as long as you are doing serious research and you intend to publish the results of your research. Please contact me at  

Item #1: A Micromorph assemblage from the Arnheim Formation, Florence KY. 

Genus/species: Varied
Period: Late Ordovician Period
Formation: Arnheim Formation, Richmondian Stage
Locality: A field in Florence KY, location undisclosed. 


I have found a layer in the Arnheim Formation of the Cincinnatian Series (Upper Ordovician of Northern Kentucky) that contains a somewhat unique type of preservation that may be of interest to invertebrate paleontologists. The layer consists of a phosphatic/calcitic micromorph assemblage consisting of abundant fauna the size of a grain of sand preserved as steinkerns (internal molds). This assemblage is different from many of the other Cyclora gastropod-rich "fossil hash" layers in the Arnheim in that it is loaded with an astonishingly large number of Cyclocystoid plates that practically out-number the gastropods. What is even more remarkable is that the Echinoderm stereom is exceptionally well preserved in this layer, but the mixture consists entirely of individual plates, with no articulated specimens.

Another remarkable attribute of this layer is the way the internal structures of animals are preserved. This has led to fossil forms that seem unfamiliar.

Click here for a discussion (and pictures) of the Echinoderm preservation in this layer.
Click here for some pictures of the other microfossils common in this layer.
Click here for a site description.

If you are interested in performing research on these fossils or would like more information, contact Bill Heimbrock at

Item#2: 3-D Conularia

Genus/species: Conularia (formosa?)
Period: Late Ordovician Period
Formation: Corryville Formation, Maysvillian Stage
Locality: Coldesac at end of Foundation Drive. Florence, KY

Click here for a larger picture

The above picture shows the four sides of this Conularia (formosa?) that still exhibits 90 degree angles at each of it's corners. This is somewhat unusual in Conularia, in that the delicate structure is often flattened. The surface of this specimen is also exceptionally well preserved and may provide additional data on the microstructure of this Late Ordovician variety.

Item#3: Encrusted 2-sided Cobble.

Family/Genera: Bryozoans and Anomalocrinus 
Period: Late Ordovician Period
Formation: Kope Formation, Edenian Stage
Locality: Orphanage Rd., Elsmere, KY

Click here for more pictures and description of this specimen.