Ceraurus? Trilobite Fossil

 

A few weekends ago, I was able to attend a field trip to Napoleon, Indiana USA. While there, I found this partial trilobite fossil which might be a Ceraurus (Chierurus) niagarensis (Hall, 1870). It dates to the Silurian Period  (Telychian to Sheinwoodian stage) in age. The fossil I was looking for this trip was that of the trilobite Spathacalymene nasuta (Ulrich, 1879).

According to Dr. James Thomka, professor at SUNY Plattsburgh, it is "from the mudstone lithofacies of the Massie Formation (long known as the "upper Osgood shale"), which is renowned for its 'cystoid' fauna."

 

Holocystites gyrinus Cystoid

 

A few weekends ago, I was able to attend a field trip to Napoleon, Indiana USA. While there, I found this fossil which appears to be a Holocystites gyrinus (Miller & Gurley, 1894) cystoid. It dates to the Silurian Period  (Telychian to Sheinwoodian stage) in age. The locality is world famous for this type of fossil. This specimen should be prepped to reveal more surface texture.

According to Dr. James Thomka, professor at SUNY Plattsburgh, it is "from the mudstone lithofacies of the Massie Formation (long known as the "upper Osgood shale"), which is renowned for its 'cystoid' fauna."

 

Silurian Coral Growing on Crinoid Stem

 A couple of weekends ago, I was able to attend a field trip to Napoleon, Indiana USA. While there, I found this fossil which appears to be a coral fossil coating a crinoid? stem fossil. It dates to the Silurian Period  (Telychian to Sheinwoodian stage) in age.

According to Dr. James Thomka, professor at SUNY Plattsburgh, it is "from the mudstone lithofacies of the Massie Formation (long known as the "upper Osgood shale").

 

 

Holocystites gyrinus Cystoid Fossil

Last weekend, I was able to attend a field trip to Napoleon, Indiana USA. While there, I found this fossil which appears to be a Holocystites gyrinus (Miller & Gurley, 1894) cystoid. It dates to the Silurian Period  (Telychian to Sheinwoodian stage) in age. The locality is world famous for this type of fossil. This one is in a matrix plate and still has part of its stem.

According to Dr. James Thomka, professor at SUNY Plattsburgh, it is "from the mudstone lithofacies of the Massie Formation (long known as the "upper Osgood shale"), which is renowned for its 'cystoid' fauna."

Rhodophyte Algae Fossil

These fossils were recently found in Allen County Kentucky USA. They appears to be a rhodophyte algae fossil. These organisms existed in the Mississippian Period. They were found in the Fort Payne Formation.

Thanks to Kenny for the images.

 

Kentucky Conularia Fossil

This fossil was recently found in Allen County Kentucky USA. It appears to be a Conularia sp. The creature existed in the Mississippian Period. The fossil is from the Fort Payne Formation.

Thanks to Kenny for the image.

Isotelus Cephalon Fossil

Here is a picture of a recent find that is an Isotelus (Dekay, 1824) trilobite cephalon fossil next to  Zygospira (Hall, 1862) brachiopod fossil. Fossils were found at a roadcut near Frankfort, Kentucky, USA. The fossils date to the Ordovician Period.

Thanks to Kenny for image

Isotelus Pygidium Fossil

 

In this picture is an Isotelus (Dekay, 1824) trilobite pygidium fossil next to little ringed funnel shapes which are the fossilized remains of a worm called Cornulites (Schlotheim, 1820). The small brachiopods in the matrix are Zygospira (Hall, 1862) fossils. Fossil plate was found at a roadcut near Frankfort, Kentucky, USA. The fossils date to the Ordovician Period.

Thanks to Kenny for image.

Zeacrinites wortheni Crinoid Calyx Fossil

This picture is a recent fossil find from the Glen Dean Member of Grayson County, Kentucky USA. It is a crinoid calyx fossil that appears to be a Zeacrinites wortheni (Hall, 1858). The fossil dates to the Mississippian Period. Thanks to Kenny for the image.