There is a strata that contains productids. It rest on a bed of mixed bryozoans.  The shale is about 15 feet thick. It rest on a breccia limestone Bed. The breccia is evaporate crusts that were pilled by tidal activity.

In these shale I found part of a plant fossil. I am hoping to find more. So far I have not seen any fish.  There are clams a…[Read more]

Hi James,

Your formation is older. It would be equivalent to the Lodgepole formation which is part of the Madison group in Montana. I also have some Productids from that formation too.

The examples of Echinoconchus I saw were from Kansas coming from Penn age rocks.

The productids in the original post are from the Kibbey formation which is…[Read more]

Hi James,

Thank you for your inqury. Based on some research the productida  Echinoconchus sp are younger and found in a different region. The examples of Echinoconchus sp lack or do not show signs of spines.

Where as my specimens have spines projecting off the pedicle valve and pedicle opening. These spines are long. I have seen these spines…[Read more]

Hi @mackenzie-smith

The differences in my leaves to those in the paper bugged me. So I contacted Dan Peppe  PhD the co author of the paper you referenced. Believing he would have more insight and  information for IDing these leaves. I am happy to say he answered my email. He sent me a Paper

REPRODUCTIVE AND VEGETATIVE ORGANS OF BROWNIEA GEN. N…[Read more]

Hey @mackenzie-smith, thank you for the reply. I had looked at Dicotylophyllum hansonium from Peppe and Hickey 2014.  At first I thought my specimens matched until I brought the photo in the report to a 100 res. and notice some differences between the example and mine.  This is the best match considering leafs of a tree can be different in sh…[Read more]