Cephalopod found in Pennsylvanian Limestone

This specimen is a Sea Pen. Originally, I was classifying local Sea Pen fossils as Pteronites, however over the past 50 years, the naming has started to change. The type species Pteronites was originally named for species found in England (McCoy 1842). In 1978, a new branch named Meekopinna (YanceyRead More →

Lepidodendron on white background

My daughter found this Lepidodendron specimen during a quick expedition to explore exposed shale along a steep roadside hill. It was lying alongside the road on a raised dirt pile on top of the soil. Logically, I believe this piece was unearthed while PennDot was making road repairs. This pieceRead More →

Brachiopod Steinkern

Catalog Number: CG-0008 Update: This has been identified as Eomarginifera longispinus. This specimen came out with more detail than I’ve ever seen in a Brachiopod locally. I was knocking off eroded edges from a large piece of limestone when this showed up. Surprisingly, I was able to wiggle the specimenRead More →


Macroneuropteris is a seed plant that has a temporal range only in the Carboniferous. I found this specimen in the talus near the lab. Most specimens I find are of small leaves, or large pieces of bark. This was more certainly a large leaf. I wanted to show the leafRead More →

Maybe Pseudorthoceras, but I’m going to give more weight to Mooreoceras because of the large size of this specimen. The shell is a longicone. Also, the position of the Septal neck is off center, as shown on the following plate. I found the impression of the larger piece still inRead More →


Original Catalog No. 2019-04-LS-000 Identification as Pecopteris is very likely. This comes from a newly found shale landslide. The piece had fallen out of the hill and was lying on the ground. The rock is very fragile. The colors shown are rarer in this area, more commonly being a greyRead More →

This specimen started out showing about 40-50% of itself within the Limestone matrix is was embedded in. I spent a good deal of time with the air scribe to free it. I am confident that it is Metacoceras, but I welcome other opinions. The raised spines along the top sideRead More →


This brachiopod is beautifully centered in what is likely a concretion circle. The specimen was found in the high-hill shale. This layer contains a shale that I call mud stone. It comes out in larger pieces than thinner shale. The rock still splits rather easily, and it contains many concretions.Read More →

Specimen Front

This specimen of Cephalopod, CG-0004, belongs to the genus Metacoceras. Tainoceras was assumed for a short period of time, however that genus does not occur in the Brush Creek Limestone. A good deal of time was spent using an air scribe to take the piece from the first photo inRead More →