Pseudorthoceras side view embedded in limestone

First described by G. H. Girty in 1912 as found in Oklahoma. This specimen was 3/4 exposed as attached to a rock. I am not positive, but I believe it would break into more than one piece if I attempted to remove it. I am always finding either Pseudorthoceras orRead More →

Aragonite Shell Material

The very definition of a fossil includes objects that have been replaced by another material. These are called casts. Impressions are also fossils, such as the shape of a prehistoric fern leaf embedded in shale rock or the impression of a shell in limestone. Somewhat common in Western Pennsylvanian fossilsRead More →

Seeing a 305 million year old prismatic surface on a piece of shell seems remarkable to me. After all that time, the shell surface still presents with a shimmer that captures and refracts light in several different directions. The views below show edge details and a close up of theRead More →

This specimen of Pseudorthoceras was exposed on the outside of a large piece of limestone in a local stream. It was several feet below the local layer, and likely fell into the stream a long time ago. A few swings of a sledge hammer and the 4 foot long stoneRead More →

Crinoid stems in Parks Township are typically discs. Rarely do you find them stacked 2 or 3 columns high. Crinoids are a living fossil, and several species are still alive today. While attempting to drop a huge piece of limestone from a steep hill, this 4cm long stem appeared. ItRead More →

I’ve found a large number of Metacoceras locally in Parks Township. Yet I haven’t found one quite like this specimen. Unique to this one, you can see the septal neck openings and the inner whorl channel. I also found a small piece of the next chamber, including the septal openingsRead More →

This combination piece came from hammering on already busted up Limestone. The Pseudorthoceras is long in comparison to most exposed specimens I find. Usually they are buried or the pieces that are exposed fall apart at the septal margins. The Metacoceras in this piece shows excellent septal suture lines andRead More →

Linoproductus was first described by Chao in 1927. It went extinct during the Permian / Triassic Extinction event 252 million years ago. More Reading About Linoproductus Online Taxon Page – FossilworksRead More →

First described in 1870 by Meek and Worthen, Solenocheilus is a genus of Cephalopod. The identification is most likely, as two experts have noted the wide square shape of the specimen. For a short time I considered Ephippioceras. However, this specimen is much too large to be Ephippioceras, which areRead More →