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I recently started researching the Keyser Limestone Formation to try to get identify some fossils I found a few years ago. I was able to make out a few genera but there are limited resources on the Keyser/Tonoloway so I could use some assistance on this one in particular. Bryozoan is my guess. Edit: Found near Altoona, Blair County, PA - Either Pridoli-Lochkovian or strictly Lochkovian. I don't know if Machaeraria whittingtoni (a brachiopod found on the same rock) is found in a certain period of time? I found pictures of it online that were from the Lochkovian in Tennessee.

Hello All! For awhile I've known the Keyser Formation hosted eurypterids, and today was the day I encountered it! Me and 2 geologist gained access to an exposure on private property and were surveying it when I found a waterlime bed with overlying mudcracks, I would start my typical survey of the bed when I encountered a segment, and it just got better from there. Unlike other horizons I've collected all over this layer is not very dense, but consistently the bed was producing. After about 4 hours of intense digging I decided to call it quits for the day. 2 different and distinct eurypterid Species have been collected, one is some sort of Pterygotid likely the genus Acutiramus, and the other is the genus Erieopterus. The Erieopterus differs from the only other Devonian Eriopterus, Erieopterus microphthalmus in its head shape, with it being wider and the eyes being spread further. The best specimens collected were a plate with 2 heads on it and a Tergite from a pterygotid. Ill attach some pictures below. Top to Bottom: Erieopterus sp. Double head Erieopterus sp. (Note the legs on the left specimen) Pterygotid undet. close up of the scales, Pterygotid undet. Layer specimens were collected from.

I visited a well-studied outcrop of the Silurian Keyser Formation in Altoona PA (USA). This is the historic quarry of the Altoona Furnace, right in the town of Altoona PA. Its a big reach for me (a relative noobie) to go through the tech reports and guides and understand it all. But its fun to try. Anyway, on a recent picture only trip, I stopped by one part of the wall with loads of stromatoporoids. I ran into another forum member and her husband a few days earlier up there. And they pointed out some structures on the top of this wall. I may ask a photographer friend to get better pics, but this was the best I could do with my phone from a safe spot. Besides some bioherm or stromatoporoid, what else might these be? The reef write up includes crinoids, bryazoa, various brachiopods etc

About eight years ago I posted about some odd fossils that I found in the Keyser formation limestone and the consensus was that they were roots of Hexactinellid sponges (glass sponges). @piranha dug up some pretty good evidence that these are indeed from Hexactinellid sponges. I recently visited the quarry again over my Christmas break and found more examples. I'm wondering if there are some fresh takes on what these may be and if anyone has found something similar? For reference, these come from an old quarry near Mapleton, PA and are from the Keyser formation which is thought to straddle the boundary between the Silurian and Devonian periods. The layers they were found in were close to layers of the Tonoloway formation which is Upper Silurian in age. Specimen #1 - This is the most interesting example I've found as the threads all seem to come from a central area and radiate out. Also note that they are layered and some have hook like endings. Specimen #2 - This is a large plate with many clusters of these threads criss-crossing each other, but all in relatively same direction. Specimen #3 - This is the first example I have that is associated with any other fauna. The Brachiopod is a small Atrypa reticularis Thanks for looking and any suggestions are welcomed.

Hi all, Another couple of mysteries that I found at an old quarry near Mapleton, PA and are from the Keyser formation which is thought to straddle the boundary between the Silurian and Devonian periods. The layers they were found in were close to layers of the Tonoloway formation which is Upper Silurian in age. I found one item that I believe is a Mariacrinus pachydactylus based on the Paleontology of New York, Part 3, Vol 2, Plate 3. It's been preserved by a black colored Chert but I don't want to acid etch it any more that I have (about an hour in vinegar). The other oddball is this UFO shaped specimen. I've found similar examples before but I ruined any chance of seeing detail on the surface by soaking them in vinegar. This is the first example I've found since then. Close examination with a lens and microscope does not show any detail so it may need to be cleaned a bit more. The "Bottom" has a nick in it or maybe it was where a stalk attached? Any thoughts? Thanks for looking!