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Showing results for tags 'paleozoic'.
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To preface this post, I want to note that I am not seeking a direct answer to the question that I am about to pose. I simply felt that some members of this forum may have insight on this topic and that it could generate an interesting and informative discussion. For a long while I have been fascinated by the diverse and unique insular faunas that have been uncovered in the fossil record. On a larger scale, unique faunas developed during the Cenozoic on the continents of Australia and South America, which were both isolated continents. Many smaller islands, such as New Zealand and Cyprus, are famous for having had unique examples of insular gigantism and dwarfism during the Pleistocene epoch. Although there are numerous examples from the latter portion of the Cenozoic, insular communities from the Mesozoic and Paleozoic are in far shorter supply. Of course, the discrepancy is likely due to the lower resolution we have as we travel farther back in time rather than a lack of island communities during these eras. Yet one cannot help but wonder what organisms could have evolved on islands during these very different periods of Earth's history. The late Cretaceous island communities of Madagascar and Hateg island have already offered some tantalizing clues as to what strange routes evolution can take in an insular environment. So, I suppose that this is a very roundabout way of asking if any additional island communities are known from the Mesozoic and Paleozoic and what evolutionary patterns members think may have been exhibited on islands during these time periods given the prevailing forms of life at the time. This thought first came to me when I considered the landmass of Pangea. There must have been islands during the latest Paleozoic and early Mesozoic that may have had the opportunity to develop unique faunas throughout the lifespan of the supercontinent. Although we will never have a full picture due to the imperfections of the fossil record, I hope that everyone finds this as interesting to ponder as I have .
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I’ve been told these blastoids appear to be Mississippian and I have some questions
SilurianSalamander posted a topic in Fossil ID
I’ve been told these blastoids appear to be Mississippian in age. That surprises me because the rocks in Dane county Wisconsin are late Cambrian - early Ordovician and the nearest Carboniferous rocks are a long ways away. I’ve done some research into the history of the buildings on the UW Madison campus where I find these fossils and they were supposedly quarried only a few miles from where they now lie. I was also told that blastoids didn’t appear until the Carboniferous. From a quick google search I got the impression that, while they massively diversified in the Carboniferous, they first appeared during the Ordovician. I’m just confused and curious as to how old these rocks are. They’re packed full of fossils and I often find tiny fossils that have eroded out of them and fallen to the ground to collect. attatched are the 2 or 3 blastoids and some of the other fossils I’ve found in these rocks. Any help as to what the age could be would be wonderful! also any IDs on some of the other fossils more specific than “gastropod” or “cephalopod” or “crinoid” are also appreciated. Thank you so much! Y’all are great.
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Been finding a lot of these tiny spiral shells. While some are definitely gastropods this one looks similar to some forams I’ve seen. Would love to know which this one is! Thanks
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Hi all! I found this tiny fossil today. It is a bit under half a cm long at its longest point. I can only imagine this is an echinoid but some confirmation would be great! Found in some very fossiliferous rock on the UW Madison campus in Dane County Wisconsin, known for being late Cambrian - early Ordovician. No clue where this rock was quarried. Thanks so much!
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I just joined here and I found these a few months ago after picking them up from two new garden areas I created with my tractor and piling most of them up I took some small ones inside and cleaned them but didn’t think much other than they didn’t look like they had been worked by the Indians hundreds nor thousands of years ago even though they all had one or two or more sides that looked clean like brand new clean and some looked oily. I was in a hurry and didn’t have my reading glasses on and just put them in a container and set it aside. About a month ago I decided to clean a few from the pile nearer our house and the sun was setting as I looked across them I noticed they all looked like alien pods, kind of like butterfly chrysalis only with alien like language or designs printed all over them as well. Hey, these are brachiopods! I looked up brachiopod fossils online and I was right as well as bivalve fossils but there wasn’t any shells on most except some looked like they had a waxy looking shell on parts or layers and they were made up of different types of minerals and colors so I did more searching and found inner replacement fossilized brachiopods and bivalves and Gastropoda and crinoids etc. The next day I cleaned more, then more, the next more and then I realized the rocks I picked up rock hounding in my food plot field the other day were all fossilized replacement shells and the big pail in my shed I picked up a couple years ago we’re all large, the same. Then I figured the pike I picked up down the hill by my other garden area, tractor buckets full are mostly inner replacement shell fossils. One from my garden is over 3’ long and about 18” wide and 18” high! It looks like granite or some sort of hard material similar to it. I had one hell of a time pushing and pulling that out of its hold, now that I’m thinking of it, I bet that’s where a lot of the layers of cement sediment I found and the cool harder pieces that look like pieces of Greek marble carved out came from as well. They are very clean and sharp angled and look similar to those little carved animals or alphabet out of stone but some look as though they were pressed out of porcelain they are so perfect that’s why I think they are inner or the shells were also replaced and look like wax and some could be outer replacement fossils? I look at them and then a minute later they look totally different. I can’t explain it? I don’t know if it’s me or what but one time they look like a dull shell made from limestone and the next they look like they are more like porcelain or that milk glass or waxy shell like layers with those unique alien designs lightly etched on the top you see on those Bryozoa posters. It could be the way the light hits them but it happens everyday, several times a day and every specimen and mineral, weird. Does anybody have any knowledge on northeast WI limestone formations and where does everybody get their information from to positively identify what the name of each species is if a person is mostly self taught? I was mostly collecting artifacts, so I thought, but now I have to go through thousands of fossils someday. What’s nice about these is they haven’t been tossed about from any glaciers. Thank you for your help and time.
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I just don't know what this thing is. It's from the Glenshaw Formation of Allegheny County, Pennsylvania. Some is below the matrix, but what is showing is about 1 cm top to bottom and 1.5 cm across. I believe it is Brush Creek Limestone and it looks like part of a fish spine to me. As always all help is appreciated. Thanks.
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- brush creek limestone
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I would like help clarifying whether a memory I have is accurate. It's about Fort Wayne, Indiana. I recall stopping in Fort Wayne, Indiana, or the suburbs thereof, at a quarry entrance, in ~2012. We did not enter the quarry, we just picked from the little garden of fossil-rich rocks that the quarry had dumped out in a public area for public use. I recall picking classic Middle Devonian fossils from a carbonaceous shale / shaley limestone that I assume was the Silica Formation. This would have been overburden worth dumping for a quarry quarrying the underlying Dundee Limestone, so piles of Silica Formation fossils make sense logically. I know the quarry at Paulding, Ohio, has something similar -- a community fossil garden out front. But this memory of mine seems to be associated with a Fort Wayne quarry. Is my brain totally making it up? Has anyone been to this place in Fort Wayne? Thanks.
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Found in Northeast Costilla County Colorado in the Sangre de Cristo Mountains at almost 10,000 feet elevation. From limited research I believe they may be brachiopods from late Paleozoic? There are shells and snail looking things. Found next to each other but not together in the same piece of rock rock. I was wondering what other kinds of fossils may be in this same area. Like fish or trilobites? Thanks
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I found these Devonian bivalves (?) at the Milwaukee formation at estabrooke park in Milwaukee Wisconsin. I think the first one could be a bivalved arthropod like an ostracod and the second could be part of a brachiopod. Any help is appreciated! Thanks. Sorry for lack of scale! I just put one in my rockhounding bag.
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I was wondering if I found an external mould of the Devonian gastropod Platyceras. The fossil curves in the rock which was hard to capture with the lighting. The rock was too big to carry back and I didn’t have a ruler with me so I apologize for lack of scale. Thanks!
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I found this piece on Friday. I thought it was wood, hammered it out, collected it in a tiny bin, and took it home. Saturday evening I put it under the scope and was surprised to see the texture. I've collected wood before and the grains are typically tighter. It also looks very similar to recovered Petalodus or fish root material I've seen. This deposit has a lot of different shark teeth, at least four unique genera are present. The limestone has the characteristics of a dynamic wash, where a lot of material was gathered and deposited quickly. Not that it helps a lot. I've never found shark bone or cartilage, so I don't know exactly what to look for. Scale bar = 5 mm.
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Hello! I bought these Cambrian soft tissue fossils supposedly from Yunnan in china off of online auction site. I won them in a bid for suspiciously cheap. They seem real to me, but I’d be interested in confirmation of that. I’m also interested what you guys have to say as to what these are. Thanks! One is listed as Naraoia spinosa, the other, fainter one is listed as Vetulicola.
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Crinoid calyx or echinoid? Found in gravel with Ordovician-Devonian fossils. About 2cm across at the widest point. Druzy coating over the fossil which seems to be an external mould. In orange jasper. Thanks so much!
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Found in a creek in Forsyth County NC, about 20 miles from Pilot Mountain NC.
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I found these burrows in Ordovician-Silurian rocks in Waukesha Wisconsin. I found hundreds of these just a few weeks ago in Green Bay WI (Ordovician) any way to identify what animal made these burrows? Thanks! ps: so sorry I forgot the scale
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Hi all, I've been finding pebbles in a park with paleozoic age fossils in them - rugosa, goniatite and this one has, along with forams and crinoid ossicles, a dark imprint that reminds of a trilobite cephalone. As for the location, I believe the gravel is from the Drava river, which may carry fossils all the way up from Slovenia and beyond... What are your thoughts on this?
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From the album: Misha's Carboniferous
Acanthodes bridgei Acanthodian fish Late Pennsylvanian Marlin Quarry Hamilton Kansas I believe this is a juvenile specimen as the squamation is only developed on less than half the length of the body and this is a pretty small specimen. The preservation on the fossil is amazing as the scales, spines and details of the head are beautifully preserved in high detail. Specimen purchased from @connorp- 1 comment
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- acanthodes
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Hi all, I've been finding pebbles in a park with paleozoic age fossils in them - rugosa, goniatite and this one has something reminding me of sand grains in a gut or poop I believe the gravel is from the Drava river, which may carry it all the way from Slovenia and beyond.. Any ideas?
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Hi all, I've been finding pebbles in a park with paleozoic age fossils in them - rugosa, goniatite and this one has something that reminds me of worm trace fossils. I believe the gravel is from the Drava river, which may carry it all the way from Slovenia and beyond.. Any ideas?
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Hi all, I've been finding pebbles in a park with paleozoic age fossils in them - rugosa, goniatite and this one has something i just can't figure out. I believe the gravel is from the Drava river, which may carry it all the way from Slovenia and beyond.. Any ideas?
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This was found on a beach in Toronto. Approximately an inch long ...a little more and about 0.75 inch wide.
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Central AL Pottsville Formation What are these round, flat cookie shaped things? Stromatoporoids? Mineral concretions? Thanks for looking!
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Sunday the 26th I took part in a DPS field trip to a plant site in Oklahoma. The locality is in the Savanna Shale which is Pennsylvanian Period, Desmonian (Desmoinesian) stage, 306-308 mya.
