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Showing results for tags 'silurian'.
Found 319 results
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small orthoconic nautiloids versus tentaculites? What should I look for?
SteveE posted a topic in Fossil ID
Blair County, Pennsylvania (USA) Silurian... According to the map the likely guess is Clinton Formation, but my gut on site said "Wills Creek" Anyway, what do I have here? Small straight nautiloids or Tentaculites? How do you tell them apart? -
Please help me identify this beautiful fossil from WI creek bed!
hantre05 posted a topic in Fossil ID
I was wondering through a beautiful moss covered forest in central Wisconsin(waupaca county) the other day and was walking though the creek picking up rocks that I thought looked neat. That’s when I came across this. One guy told me he thinks it’s some kind of clam from the Silurian period but it’s also covered in other fossils. Thanks! P.s. I’m sorry I had to hold them and get my fingers in the pictures, their was no other options. -
These are eight finds that have me scratching my head. Please help me identifying them. Some are so very worn, please feel free to just guess. #1: "Oddball". Feels glassy, hard. Inside, I can't see much further by eye than what's visible in the photo. Just more of the hardened lentil soup..... #2: "Mystery Shape" While it looks grainy, it actually feels really smooth and hard. It reminds me of a mollusk shell cut at a slant? Or an extremely wide spaced chain coral? I love its elegant shape. Oh, and it's about 2cm long. #3: "Bandaged Dude" Is it possibly a bryozoan "sheet" that's draped over something else? #4: "Spiral Stairs to Nowhere" I split a piece of limestone and several of these became visible, each in its own empty casket. Doesn't look like a crinoid stem. (Sorry about the out-of-focus, bad quality photo, alas, it was taken in fading light without a tripod) #5: "Zigzag Doodle" I promise, it wasn't me who defaced this rock... #6: "Gas Bubble" This thing has very thin but hard and very sharp edges. It's about 1cm deep, yet, it weighs all of 5 grams. I have the beginning of a paper wasp's nest of about the same size, which weighs about 1 gram. So it's barely heavier. Also, what might the small egg-shaped things be which are visible in the bubbles? Worms? #7: "Metallic Paper Fringe" The slight metallic sheen isn't visible on the photo. Anyhoo, I can't even guess....
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I found this 4cm wide "knitted mushroom cap" at a beach near Kenosha in SE Wisconsin. I thought at first to have found a tabulate coral, but looking closer, I can't see any corallites at all and oddly, the top, instead of flaring out to a solid "table", curves back into itself, with most of the center missing altogether. All of this made me think that maybe this is a sponge? If not, what could it be? Top: Bottom:
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I plucked this from Cherry Creek in Winona Lake, IN, and am wondering what is encrusting the stone. Thx!
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I'm in need of your help. I'm trying to learn how to recognize and maybe differentiate brachiopods from bivalves in the worn fossil rocks I find on Lake Michigan's beaches. If indeed it is one or the other, how do you tell which? In the photo below, what looks like the shaft of an arrow, is it the foot or stalk? OTOH, if it's neither b-pod nor bivalve, what is it? Often I find just bits and pieces in these tumbled rocks. I suspect some of them to be parts of shells, but I'm not quite sure. The shape within my blue circle below is visible over and over on many of my finds. Is thisa part of a shell? Or not? This fossil turns the corner on the same rock as above. It's visible on both sides of the fossilized rock, which is about 5mm wide. I've combined photos of both sides of the rock onto one pic. The total length of this fossil is just about 2.5 cm. I assume that's a cross section of a shell showing the insides of the two valves?
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Are all of these bryozoans? If yes, what are their specific names?
Pippa posted a topic in Fossil ID
Hello, I think the rocks below contain at least two different species of bryozoa fossils. Is it possible to identify them by name? If not, would better specimens with more visible detail make that possible? Some, as in the first pic appear as b/w, narrow lacy (sometimes striped) leaf like shapes. Others, as in the second pic, look more animal like, sometimes "hairy", but sometimes are just wide blobs with no visible detail. I'd really appreciate this forum's fossil experts superior knowledge. Thanks in advance. -
Hey everyone! I finally had a day to go out and enjoy a Saturday fossil hunting with no time limit!! I decided to check 2 middle Devonian locations that have yielded nice dipleura specimens in the past. I’m still looking for “that one” specimen....eventually I’ll find one. I didn’t find the trilobite I tasked myself to find but I did find awesome stuff on Saturday . So here is a little trip report from Saturday September 28, 2019 plus some extra stuff I found earlier in the month. I’ll throw it in at the end. I got up really early so I could get to Cole Hill by sunrise. I had 2 sites in mind from the start. My new house is now only 30 minutes away from CHR which was a nice surprise! Early morning view I’ve had some tough outings at Cole Hill. This rock is so hard!!! I’ve tried clearing overburden just to get to more immovable rock. Anytime I get things moving I find something decent so that was the goal. Find rock that moves!! I ended up finding a spot way off the main outcrop and I got to work. I immediately found a plate with 5 cephalons!! It’s not being very photogenic so I took a picture after making them wet. the right shot shows 4 cephalons stacked in between the white scale bars....the left one shows the 5 hidden cephalon that Is under another cephalon. The bottom piece is just a cheek but could continue I’m not sure. Not very photogenic but rare to find an assemblage like that. I was able to find an area with more weathered rock and I found around a dozen cephalons!!! These are the better and bigger ones. I have a few nice juveniles but they are half covered in rock. I liked these 2 a lot. The left one is very 3D (also came in 10 pieces lol) and the right one has all the cephalon margins intact!! some nicer pygidiums I found. I found 7-10 total in various conditions. I found a lot of associated fauna as well!! The Gastropods came from mostly one bedding plane. The same spot I found the cephalon hash plate these were not far behind littered all over. I also found a bunch of bivalves! Way more than I usually do. I collected more on this trip than I have in the past. The rock kept moving and I kept finding!! After I worked the shelf back far enough I decided I wasn’t going to try and find a new spot. 4 hours of collecting and it was time to go to Deep Springs Rd. Even though I didn’t find exactly what I was after I found lots of amazing specimens compared to past trips . Kept my finder crossed that DSR would be as kind. DSR next post.....
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Found this rock in Highwood, IL, north of Chicago. I used to give this rock not much thought, just assumed I had thin wavy crinoid stem molds. Looking at it closer, I'm not so sure any longer. The stems seem to me to be too neatly lined up, as if the individual stalks had been cemented together when buried. Also, the individual "stems" don't seem to each have their own outer skeleton, unless the white vertical lines contain both of the adjoining crinoid skeletons but just appear as one. What's the likelyhood of that? What do you all think?
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Is this a fossil?
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I was wondering if this is a brachiopod. Thx!
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Hi, all, A friend over on the Facebook group "Great Lakes Rocks and Minerals" recently posted this little silicified pebble she found along the shore of Lake Michigan, northern lower peninsula. The tiny pores got several of us on the group curious about whether we could narrow down a possible ID. Someone initially suggested heliolitid, but I think we ruled that out because there doesn't seem to be enough room between corallites for coenenchyme. We decided it must be some species of small-celled favositid, but is it possible to narrow beyond that? (My gut says probably not, since we don't have thin sections or better views!) I was curious about Astrocerium (referred to as Favosites venustus in older descriptions). It's described from the Silurian (Niagaran) of Michigan, which seems to fit with this style of silicification. Also, I think I see what might be interpreted as spinules in some of the corallites, but maybe this is just an effect of silicification. Plus, I guess spinules are pretty common in favositid species, so it could be any number of small-celled species of Favosites or Emmonsia. If anyone has examples of Astrocerium from their collection, I would love to see photos! P.S. Hope it's okay to tag you two, @TqB and @FossilDAWG -- wasn't sure of other coral experts to ask, though I know they are around! Thanks much! Lisa
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I found this tiny "pebble" lying at a beach north of Chicago when hunting for interesting non-fossil beach rocks and sea glass. (Yeah, there are people who collect and love sea glass and "just rocks" :-) So now, that I've started to collect coral fossils as well, mostly corals, I've been taking a closer look at some of my old finds and see all sorts of little fossil bits and pieces. This one when I found it, had caught my attention due to the tiny pattern, which I thought at the time was maybe something man-made. (Near a big city, there is a lot of man-made tumbled material to be found at the beaches). Looking at it with my magnifying glass, I saw that the individual white spots seem to have the same starlike pattern as the large corals I find. But this thing is almost microscopic. Is/was there really coral with such tiny corallites? If yes, what is its name? Maybe a tiny favositid? Top: Bottom (and side):
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Hallo, in diesem Jahr fand ich ein problematische fossilen im Steinbruch von Bungenäs, Gotland / Schweden (Slite-Gruppe, Wenlock, Silur), hat jemand eine Idee, was das sein könnte? Meine erste Idee war , dass es ein Fragment eines Kopffüßer sein könnte , aber ich bin nicht shure! Grüße Uli
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Found this at Trout River, NWT amongst other fossils in an area that is supposedly Silurian period. Rock is only porous on one side. I have no idea if it is a fossil or if the rock has been through some sort of physical change. Let me know if higher res pictures are needed. All responses are appreciated.
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This morning I made a trip to a local spot. Wenlockian. Gravicalymene celebra, measures 4cm This one was difficult to work with, as dolostone always is. Ommokris obex cephalon, which turned out to be partial, and a small ventral calymene. The arrow points to the tongue-like protuberance which I was able to extract in one piece and glue back on, giving this trilobite a gargoylesque appearance. And last but not least, a mystery find...
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From the album Echinodermata
Size of the plate: 23x12x4cm. Silurian Erfoud, Morocco -
Can anyone identify this crinoid from the photos below? This is from the Silurian Waldron Shale of St. Paul, Indiana.
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Stumbled arcoss what a seller is calling a careaonitas sponge from the Hopkington formation in Milwaukee county Wisconsin. I tried to Google careaonitas sponge and didn't find anything...is it possible to have a different name or is it simply a misspelling by the seller and my Google skills are weak?
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Hi, wondering what these two Encrinurid species might be? Sugar Run formation. Can't seem to find a match.Thanks for any help. 1
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So I have partially removed an orthocone from a nodule that I found in some eroded glacial till. The rock is most likely silurian in age but I can't don't recognize this orthocone. It seems to have faint striations running lengthwise down the shell, which I haven't seen before.
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I found this concretion in what I believe to be Lockport dolostone, which is silurian in age. At first I didn't think much of it but then I noticed the surface has a faint texture of cracked shell. I was wondering if this could be a silurian ostracoderm like Tremataspis?
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I recently found a nice Calymene tuberculata trilobite on my vacation to Gotland. I’m currently in the process of preparing it and wonder what coating I should use? Is it possible to give it a slightly wet look while not making it look glossy and artificial? I’m considering some kind of vax-based product. Any tips?
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Upper Ordovician (Cincinattian) & Silurian Fossils for Trade
Elasmohunter posted a topic in Member Fossil Trades Bulletin Board
Hey, all! I have a surplus of Upper Ordovician (Cincinnattian series) and Silurian fossils from the Dayton area. Fossils include diverse brachiopods, horn corals, orthoconic nautiloids, and bryozoans as well as trilobite fragments. Would anyone like to trade for these fossils? If there's anything in particular that you'd like from the area that I don't already have in my collection, then I may be able to go search for it before the trade, too. If anyone expresses interest, then I'll upload images of said fossils in the next few days. Let me know! -
From the album Hamilton, Ontario Fossils
Paleofavosites asper (d’Orbigny, 1850). Coral squashed on grey shale. Found in the Manitoulin Formation of the Cataract Group on the Niagara Escarpment. Locality is the Devil’s Punchbowl, Stoney Creek, Hamilton, Ontario. Early Silurian.
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