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I am going to start adding some images of my favorite finds which I call Collection Pieces. Identifications range from maybe, probably to most likely. I've only started to seriously collect over the past year. I've spent a great deal of time studying and learning Geology, as a hobby. I am located in Western Pennsylvania. At first, a map of the area. Anything in bright yellow is the Glenshaw Formation. The Ames Limestone layer exists between the Glenshaw and the Casselman Formations, which is the Orange color on the map. I have yet to explore the Ames Limestone, so I've only found fossils that exist in the marine zones below the Ames. Second and Third, are Metacoceras. The Fourth photo is of another Metacoceras. The id is slightly less likely as I can only see a few of the rounded spines. But I'm pretty sure it is one. Coming up next is a Mooreoceras that I found just this past weekend. I maintain everything on a website, that is listed in my profile. Thank you! Clint
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- carboniferous
- glenshaw formation
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We have property on the Slippery Rock Creek located in western PA. There are a lot of chert nodules on the hillsides that are constantly being exposed by spring and rain waters. My daughter and myself were looking the other day and found these. They were with several other pieces that also look to have fossilized remains.
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- portersvillepa
- slippery rock gorge
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I think this is the genus Antiquatonia, but I’m looking for some confirmation. I found this back in April, going through my finds and trying to ID. Found in Limestone. Glenshaw Formation (Conemaugh Group)
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- brachiopod
- carboniferous
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By far the most detailed Brachiopod I’ve found to date. The top impression, which isn’t shown, appeared to have two larger bands running down the center. The small piece in attachment 3 was somewhat of a steinkern or impression below it. Scale line is 1cm. Photos taken with a DSL through a microscope. This came from eroded Limestone.
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- 2
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- brachiopod
- carboniferous
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So most of what I find is Metacoceras or Pseudorthoceras, two very common cephalopods locally. I've found a few Solenochilus, but they are different enough that I know what I found right away. This specimen was discovered as a body chamber. I thought Metacoceras, because, why not? Anything of this shape usually is. After some moderate prep, I revealed some more body chamber, but not any suture marks. The venter is oddly shaped as well, with a shallow U shape. It might be crushed, so I didn't pay it too much mind. I also discovered that the body chamber is much larger than any Metacoceras specimen I have found to date. In viewing the paper A NAUTILOID CEPHALOPOD FAUNA FROM THE PENNSYLVANIAN WINTERSET LIMESTONE OF JACKSON COUNTY, MISSOURI (full paper), I found plate 5 which features Domatoceras. They are known to exist here, but I've never found anything definitive. Here is the plate from the article: Here is a Metacoceras (CG-0071) on the left, and the specimen in question (CG-0068) on the right. Here is the venter of CG-0068 showing the two ridges marked with arrows. I feel these are similar to the ridges shown in Figure 2 of Plate 5 And that is that. Any cephalopod people have an opinion? I could prep it more, it's just at the labor intensive micro prepping state right now with solid cement like limestone overlaying it. One more photo of it for some additional context:
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- brush creek limestone
- cephalopod
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I'm working on my fossil limestone sink and there are a handful of fossils showing up in the polished bowl. Most are horn corals or shells, but this particular one caught my eye. It might just be a shell or something, but I figured I'd let trained eyes give it a shot. It's about 1inch long.
- 4 replies
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- carboniferous
- glenshaw formation
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I think this is Odontopteris. The flat leaf tips are what have me thinking that. I have lots of local shale that I can pull these from readily, but maybe once or twice over an hour I can pull one this size out. Any fern experts here able to validate? Attaching a couple fossil plates that I use to identify local ferns.
- 3 replies
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- carboniferous
- fern
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To continue discussion on the specimen listed here, with renewed focus on it being a Cephalopod. As of right now, I'm deciding between Solenocheilus and Ephippioceras. Going directly by the book: Index Fossils of North America (1944, 1980 printing), I can see positives for both. Solenocheilus (Lower Mississippian to Lower Permian, IN, IL, MO, KS, TX and Europe) Recommended by a local expert, but doesn't specialize in Cephalopods. Ephippioceras (Mississippian in Europe, Pennsylvanian, Ohio to Kentucky, Nebraska to Texas) The raised line along the midline of the plate photo is what is selling me on this one. My specimen is much larger than the plate, but not quite double the size. So, two new photos of the specimen. First, looking at the line: (After seeing it this way, I was looking at it 90 degrees in the wrong direction) Flipped, End over end. So, any opinions? I was thinking of removing more matrix from the matrix heavy size, but it will certainly remove the shell material and leave the steinkern.
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- cephalopod
- conemaugh group
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A second large Clam or Oyster? I dug a huge piece of limestone out of the hill and split it into three with a sledge hammer so that I could actually pick pieces up. After the heat this weekend, they were easy to pick apart once I got them home. Yesterday, I found the first piece. This is the one I found today. When it came out of the rock I was a bit shocked at how large it was. I carefully tapped around the specimen and was able to remove most of the surrounding rock carefully. This is the larger of the two pieces I found this weekend. I have less confidence in identifying it as has less features than the first piece. You can see shell material flaking off in the 3rd and 4th photos below. The fossil after I found it: Then, once I removed it from the rock:
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- carboniferous
- clam
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I love and hate finding large fossils. They are really interesting and striking to look at, but I have a hard time getting an ID on them. I dug a huge piece of limestone out of the hill and split it into three with a sledge hammer. After the heat this weekend, they were easy to pick apart. Yesterday, out popped this piece. There is another one I found today that I will be posting after this one. This piece has several wavy ridges. The shell material looks pearly, and perhaps some calcite replacement has happened. There was a piece of shell stuck on the mold portion as well. I'm seeing about 6 distinct ridges. Anyone know what it might be? Before I removed it from the rock: Several views after removing, trying to show the ridges:
- 4 replies
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- carboniferous
- clam
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Two mystery mini fossils. I’ll include scale photos, with marks at 1/2 mm. I’m on the lookout for Carboniferous Trilobites, and examples I’ve seen are very tiny in this formation, no more than 1/2 inch long.
- 4 replies
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- carboniferous
- conemaugh group
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This one showed up after a rock split. The steinkern was really shiny and smooth. Usually the shell is hard to save, but I was able to when air chiseling away at this one. There are noticeable grooves on one side.
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- 2
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- carboniferous
- glenshaw formation
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Found this one in the eroded limestone. It came out in two pieces. I believe it to be a clam. You can see it dimensionaly through the top. I'm still going to clean it up further.
- 3 replies
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- clam
- conemaugh formation
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