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Showing results for tags 'Penn-Dixie'.
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Found as surface float near the top of the Windom exposure, a few feet below the Genundewa Limestone at Penn-Dixie Quarry in Hamburg, NY. A very common fossil in Hamilton Group sediments. Similar to Emanuella praeumbona, distinguished from E. praeumbona by the hinge width; the hinge of A. umbonata spans the width of the valve, while that of E. praeumbona is narrower. A. umbonata has a nearly flat brachial valve, while that of E. praeumbona shows a convex profile. Full-sized specimens of A. umbonata are also not as large as E. praeumbona. Originally designated Orthis umbonata. A. umbonata has been defined as the type species of Ambocoelia by Hall. References: Wilson, K. A. “Field Guide to the Devonian Fossils of New York” (2014). Paleontological Research Institution Special Publication No. 44. Linsley, D. M. “Devonian Paleontology of New York” (1994). Paleontological Research Institution Special Publication No. 21. Hall, J. Palaeontology of New York v. 4. (1867) Fossilworks. http://fossilworks.org
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- a. umbonata
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Found as surface float near the top of the Windom exposure, a few feet below the Genundewa Limestone at Penn-Dixie Quarry in Hamburg, NY. Distinguished from Ambocoelia umbonata by the hinge width; the hinge of A. umbonata spans the width of the valve, while that of E. praeumbona is narrower. E. praeumbona also shows a convex profile to the brachial valve, and grew to a larger size. E. praeumbona is common in the Hamilton Group only within the upper layers of the Windom Member. Originally designated Orthis praeumbona, later assigned to Ambocoelia, then reassigned to Emanuella in 1990. References: Hall, J. Palaeontology of New York v. 4. (1867) Fossilworks. http://fossilworks.org Yale Peabody Museum Collections website (http://peabody.yale.edu/collections/invertebrate-paleontology) Brett, C. E. Biostratigraphy and Paleoecology of the Windom Shale Member (Moscow Formation) in Erie County, NY. 1974. State University of New York at Buffalo.
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From the album: Scolecodonts
Scolecodont fragment Length: Approx. 1 mm Upper Devonian North Evans Limestone Genesee Fm. Penn-Dixie Quarry Hamburg, NY -
From the album: Scolecodonts
This is the first scolecodont I ever found. When i first saw it under the microscope, I thought a passing beetle had dropped a piece of chelicera in my matrix! Only when I saw a second piece, still embedded in a limestone chip, was I certain that I had a fossil. I was correct about this being a chitinous jaw element. I was extremely incorrect about the age, phylum, and preferred living environment of the original owner! Size: Approx. 1 mm Upper Devonian North Evans Limestone Genesee Fm. Penn-Dixie Quarry Hamburg, NY -
From the album: Scolecodonts
This is the 1st box in my display case, containing 3 scolecodonts. All of these specimens are around 1 mm long. Upper Devonian North Evans Limestone Genesee Fm. Penn-Dixie Quarry Hamburg, NY -
Back in early September, my husband and I went back to Penn-Dixie for another day of fossiling. I was particularly interested in collecting some North Evans limestone to search for microfossils, especially conodonts. Well, I'm not entirely sure that what I collected was North Evans (it might be Genundewa), but I've been slowly dissolving small pieces in vinegar ever since. I've seen lots of tiny weird things, probably foraminifera, with some possible echinoid spines for good measure. Tonight, I found what looks like a conodont to my admittedly inexperienced eye. Here are my 2 best photos (camera held up to microscope eyepiece): Is my identification correct? Does anyone have any further information on this particular piece? I'm excited!
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I have a few dozen conodonts that I'm in the process of photographing and mounting for storage. Among my collection, I have several Polygnathus linguiformis examples. Last night, I mounted two P. linguiformis on my "Conodonts II" storage card. This one caught my attention: That pale growth on the underside struck me as odd, especially compared to the other P. linguiformis that I handled last night: So I went to look at the P. linguiformis that I'd previously mounted. Here are 3 of the 4 for comparison: I also looked at the page in "Conodonts from the Genesee Formation in Western New York" that shows a number of P. linguiformis for further comparison. While several show liplike growths on the back, none are quite as pronounced as the first specimen I showed here. I'd be curious to see what other collectors think about this set. Do I have a pathology, or is this an element from a really old individual?
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Here's a piece from my Windom Shale (Middle Devonian) that I'd really like to identify. Anyone recognize it? I can think of two possibilities, and I'm not sure where to look to be sure. 1) Fish coprolite 2) Worm #1 seems more likely, somehow... I think this was preserved inside one of the tubular pyrite nodules that are common in this shale. Whatever it is, it's interesting! It's about 1 mm long.
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I've been experimenting with breaking down some Windom Shale from Penn-Dixie, and I think I have some ostracods: I have a few other interesting bits, too. Are these echinoid spines, micro-belemnite bits, or something else? And then there's this object: That's a small sampling. I also have found lots of brachiopod pieces, which is not surprising. The shale is rich in macrofossils, especially brachiopods, trilobites, horn corals, and occasional straight cephalopods.
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Found this trilobite on a small slate piece found at penn-dixie. I found a couple of greenops and phachops but the side spines look wrong for a greenops. Its very small this pic is from my digital microscope.
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Got home and began inspecting the trilobites found at Penn-Dixie this past weekend. Found this head scratcher on the side of a slab my wife collected. Any ideas on ID?
