The ridge in the far left of the picture is the Tuscarora, so from the bedrock geology maps, its looks like these fossils are part of the Mahantango Formation.
Here is a photo of a few of those Tentaculites.
The small tentaculite fossil pictured below may have some of its original shell material preserved...the pen tip is for scale.
From the reading I've done, it sounds like there is some debate as to whether tentaculites should be classified as molluscks, crinoids, or something else. They are neat looking, whatever they are.
Here is a photo of the chunk of a layer of the shell hash.
Here are some close-ups of the shell hash.
Needless to say, finding these fossils was exciting for the boys that were with me on this ramble.
I split the rock open like a book to reveal many tentaculites.
Here is an example of an exposed fossil bearing stratum...the lumpy rock with many small holes...three layers to the left of the Ebony Spleenwort.
The photo below is a closer crop and you can see that most of the tentaculites are oriented with their apexes to the right, with just a few with apexes toward the left. Also, there are a few odd ones oriented at various angles.
In the picture below, I turned perpendicular to the rock layers and took the photo towards the Tuscarora.As the many bedrock layers (hidden by soil and vegetation) proceed toward the Tuscarora, they become stratigraphically older. These rock layers, at one time, all continued in an arch (a fold of arching strata is called an "anticline") over the Tuscarora Mountain. In the picture below, the boys are looking at fossils exposed in the "left over" layers, or "stumps" of the folds that have vanished.
Thank God for anticlines.
Those folds brought up these fossil bearing layers to be exposed for the rambling naturalist to enjoy.
The folded rock layers also provided a nice place to find Ebony Spleenworts.