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This was found on a river gravel bar in southern Minnesota. There are glacial gravel deposits in the area. I believe it may be a piece of tusk bark (the outer bark or cementum) Thoughts?
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A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
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Is this a rock or a rock with a fossil in it???
BlueSkySky17 posted a topic in General Fossil Discussion
I found this today while out side on a river bed. The part i found it at is usually not seen & covered by water but the river is unusually dry so i found it on an exposed part. I’ve tried reverse image search & using a rock identifier but can’t find anything that looks similar besides other kinds of fossils. I’m really interested in learning what it is!!! i live in southern minnesota. -
I found this in moose lake MN looking for agates was curious what it might be thought possibly tiny sand dollar
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Found several of these on a beach in Grand Marais, MN on Lake Superior. The light colored part is a bit rougher feeling and the red/maroon knobs or nodules are quite hard and smooth and raised. I can’t find anything on them…someone mentioned in another forum possibly Rapakivi Granite or Granite Mica Schist but I think they seem a bit different than the images I saw of those. The largest one has a few tiny pockets of crystals. Thoughts?
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I found this rock finger it even has the rock finger print so clear you can scan it
DPING3312 posted a topic in Fossil ID
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From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Specimen on the Left is bought online, from Wisconsin Mifflin Platteville Formation. Campylorthis deflexa is the middle one with Rostricellula minnesotensis Leftmost. Oepikina minnesotensis is rightmost. The specimen on the right is the closest Minnesota mifflin Campylorthis deflexa like specimen that I could find. It is darker color rock so its harder to see good textures but if you look closer toward the edge you can see where ribs are which makes it more coarse than the much more numerous Strophomena and Oepikina which are distinct characteristic in Twin Cities bed.-
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From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
All sources had says there are only two genus of the family of this particular brachiopod and Protozgya and Rostricellula is listed for Platteville Formation. Protozyga is too different and much weaker ribs structures by comparations.-
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From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Like Anazyga recurvirostis, A. plinthii tend to prefer muddy limestones and is locally abundant where found in Twin Cities. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Flatter than A. recurvirostis and a bit bigger.-
- anagyga plinthii
- anazyga
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From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Very recently in 2023 paper came out that basically places all Zygospira earlier than Mayville/Richmondian in genus Anazyga. Cinnicinntea website also had name change for Anazyga recurvirostis since it also extends into maysville formation. The Decorah Formation Twin Cities can have a lot of those but oddly enough to me they are very specific to muddy limestone as I never find them in the weaker shales for unknown reasons. One of the tiniest Decorah Formation Brachiopod species I have ever found, tiny enough to balance on eraser end of pencil. Compare to the other Anazyga species it is much smaller and more inflated in shape.-
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- anazyga recurvirostis
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From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Those are the closest specimen I could find that I think is Anazyga lebanonensis. Described as longer in length than the other two Anazyga species from Decorah Formation.-
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From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Lepidocyclus - Decorah Formation only? For me I hadn't found it in Platteville formation for unknown reason - could be locations. Very abundant and highly variable in forms - I suspects quite a few genus and species can be easily mistaken for this one. Part of it is I only find the smallest ones as strongly triangular and more flat with sulcus not as prominent. But all the bigger one are much more inflated. Plus costae is pretty uniform over all species. Transverse growths are sometimes prominent on anterior portion of the shell, usually on adult specimens.- 1 comment
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Plant impressions i found in material from the Coleraine formation of Northern Minnesota, which dates to 100-90mya, i confirmed with a paleontologist that these are first known plant impressions ever found up here which has me excited but neither of us know anymore than that theyre plant impressions, can anyone here maybe give more specific information from my pictures? i hope these pictures are good enough, i donated it for further study so I can’t get more. Even if you can’t ID them i still want to know what you guys think!
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Hi everyone! I was in SE Minnesota recently, looking through limestone outcrops where I have found cephalopods on a previous trip to Mystery Caves, MN. While looking for more cephalopods during my most recent trip to Fillmore County (and finding a few) I found this piece shown below. The fossil is likely Ordovician aged, as is common in SE Minnesota. The formation I am less sure about, but if I had to make a good scientific guess, it is the Galena formation. My question is if this is a cephalopod fossil that is just heavily eroded, of is this just a cool rock? I decided to also flip the fossil with my hand to better see the ends. Thanks for the help everyone.
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- cephalopod
- identification
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Proboscidean from Southern MN gravel pit on Minnesota river. Mammoth or Mastodon? The acetabulum (socket) is approximately 7" in diameter. Sorry for lack of scale
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I found this in material from the Coleraine formation of Northern Minnesota, which dates between 100-90mya, which was part of the east shore of the Western Interior Seaway. So far i know it’s reptilian but I’m wondering if anyone can give me a more specific identification. The exposed part is about 2.5-3cm long.
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A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
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Hi all, I found this in far northern Minnesota near a river. The circle is on both sides of the 2" thick rock, so I am assuming that a cylinder extends through it. After looking at images online, I am thinking that it might be a fossilized tubeworm, but none of the photos that I've seen quite match. Northern Minnesota has obviously had a lot of glacial activity in the past (possibly Blackduck Formation in the location found), and this area has Neoarchean bedrock. Thank you for any information that you can provide!
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I'm currently working on a construction project in Minneapolis, MN. We uncovered some bones about seven feet down while excavating in the street. They are very dark brown. Help on ID would be appreciated. I know they're not fossilized but seem to me to be fairly old. Maybe Buffalo or Cow? Thanks in advance.
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I found this rock (far Southwestern Minnesota) by a river in a pile of rocks placed their by the city. It’s possible it just came from construction and isn’t a fossil at all. But it’s also possible it was naturally occurring in the river as it was down near the water and the river has been a lot lower than normal. I have zero expertise with fossils, and was wondering if anyone recognized this as something. The “fossil” has 9 identifiable segments of concave rectangles all the same width and length, that curve around the rock. Any comments are appreciated!