Tuesday, November 24, 2009

Hemiaster whitei Fossil




A Hemiaster whitei sea urchin fossil found in Tarrant County, Texas. Goodland Formation was the location this fossil was located. The creature existed in the Lower Cretaceous Period (about 105 million years ago).

Thanks to Herb for the image.

Kentucky Star Fish Fossil

Here is a star fish or sea star fossil found on a field trip to Franklin County, Kentucky. It is a very rare find. The fossil was found in the Lexington Limestone and dates back to the Ordovician Period.

The Fossils of Ohio book shows one called Salteraster grandis (Meek).

Thanks to Kenny for the image.






Modern day star fish for comparison.  I believe the star fish was found in Florida.


 

 

Monday, November 23, 2009

Cornulites on Rafinesquina Brachiopod

Interesting fossils in this picture of a brachiopod shell hosting a number of worm tubes. These fossils are from the Ordovician Period and were found in the Lexington Limestone(?) in Franklin County, Kentucky.

There appear to be 15 worm tubes (Cornulites) on the Rafinesquina brachiopod shell. Apparently the brachiopod was dead when the five attached themselves to the inside of the shell.

Approximately 10 Cornulites attached to the outside of the shell.


View of five worm tubes attached to inside of the shell.

Closeup of the shell edge with worm tubes.