Limestone found in water usually yields better specimens. The water works its way into the cracks and crevices within the rock and specimens often come out easier compared to dry limestone. This specimen of Metacoceras is one of my best ones yet, coming out in once piece and showing aRead More →

One of the best specimens of the genus Metacoceras that I currently have. Metacoceras is one of the two most common species of cephalopod found in the Brush Creek Limestone. I have difficulty assigning a species. Even in the Treatsie on Invertebrate Paleontology, there is a belief that there areRead More →

A crescent shell indention showed up on the flat top of a piece of limestone. I thought maybe a large clam shell, but at this point I should know better. I hammered the rock for a while, thinking that maybe a piece would break off and reveal part of theRead More →

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 →

Metacoceras Fossil from Parks Township, Pennsylvania

First named by Alpheus Hyatt in 1883, Metacoceras is one of the two most common cephalopods I find in Parks Township. Pseudorthoceras is the other one, a narrow straight shelled genus. This specimen shows nice banding where the individual chambers are on the shell. The first photo shows the shellRead More →


I am currently updating this post. I received a more solid identification of Brachycycloceras after a visit to the Carnegie Museum. First described by Miller in 1933, the genus Brachycycloceras occurs from 326 million years ago up until the Permian extinction, 252 million years ago. This genus is relativity unknownRead 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 →

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 →