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Showing results for tags 'silurian'.
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I am the president of the Oxford County Mineral and Gem Association, but I am at least as interested in fossils as minerals. Maine is of course not known for fossils but there are some in the north. After living here nearly eight years, my wife and I finally ventured in that direction to see what we could find. The attached file was prepared for the OCM&GA newsletter. Hope you enjoy. Tom Hoffelder A FALL FOSSIL TRIP TO THE RIP.pdf
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The weather is exceptional in southern Ontario, these days. 25 degrees C! That’s 77 degrees Fahrenheit to my US friends and for here in November it is exceptional! We decided it was a great day to go to Big Bay which is situated on Georgian Bay between the Owen Sound and Colpoys Bay a beautiful place down a gravel road; it can be busy in the summer but we knew today it would be quiet. The trip was purposeful because I know it is just full of water washed fossils and I wanted to post pictures of what is there. I wanted to show you all how prolific the Silurian Ocean was. I also included a couple of photos of the beach it’s self. Hope you all enjoy.
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From the album: Trilobites
Fully inflated. Length of 44 mm. -
So i might soon be heading to a silurian site. It has shells trilos crinoid stems. But i would really want to find a complete crinoid. Any tips how? Split rocks open? Look in areas where theres alot of crinoid stems?
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I found this specimen last summer in the St. Paul Stone Quarry in St. Paul, Indiana. I think this site is Silurian. The oval on the left is 1.5 x 8 cm. The one on the top is 4 x 10 cm. Lots of smaller ones. They're flat, not raised. Any idea what they are?
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Can anyone identify this crinoid from the photos below? This is from the Silurian Waldron Shale of St. Paul, Indiana.
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Hi, I'm not a collector of fossils. I found this about 20 years ago. It was from the Niagara escarpment at Inglis Falls just outside of Owen Sound Ontario Canada. According Wikipedia the escarpment's caprock is dolomitic limestone and is composed of an outcrop belt of the Lockport Formation of Silurian age. I thought it might be a winged insect but if it is Silurian or Devonian maybe a water based creature. I'm not sure if it is a wing on top or part of something else. There appear to be a few small and very small mollusc shells embedded in the rock although they aren't clear in the photo. In the side strata there is quartz as well as other layers including a dark/black layer. Whatever it is appears to be missing the head. There does appear to be another leg on the rock top as well. Thanks for you kind assistance. Best Regards, David
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Trilobite Calymene celebra from Silurian of Wisconsin
traveltip1 posted a topic in Fossil Hunting Trips
I found these 2 specimens (molds unprepped) of the trilobite Calymene celebra, the official Wisconsin state fossil, in the Silurian of Wisconsin.
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Dear editorial staff, I’m not sure if this is permissible in this format. If it is can you edit the first page to stand upright? I am still an amateur! What I want to say is: This is so exciting to me because the fossils I find around here all indicate to me trauma, from tidal events! These events most certainly directed evolutionary change and development, including increasing the oxygen levels in the water much the same as filters do so in an aquarium. Where I live feels like an Paleozoic, evolutionary test tube. ARTICLE LINK
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Hi Everyone, I took a 2 week trip to the Ohio Valley, arriving back in New York about a week ago. It was primarily a family visit since many of my relatives now reside in the Elizabethtown, KY area. However, the Ohio Valley, as some of you know, is very rich in Paleozoic fossils and I just had to make a few stops on my way there and back as well as between family engagements. I will try to share enough to give you all a gist of it: It was a long day's drive from the northern suburbs of New York City to Richmond, Indiana where I spent the first night. The next day I was headed down State Road 101 to Garr Hill, to collect in the Upper Ordovician Liberty Formation. It was my first time at the site and everything I found was collected from loose rocks at or near the base of the outcrop. A couple of pictures:
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I've been cleaning away at this by hand, I can't get much further as the rest of the matrix is very hard. What have I been uncovering here? I thought brachiopod shell when I just saw the edge, now I have no idea. Looking at other pics of Wenlock fossil I couldn't spot anything similar. Can anyone enlighten me?
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2 more Halysites 'chain coral' from Silurian in Wisconsin, acid treatment
traveltip1 posted a topic in Fossil Hunting Trips
Here are 2 more Halysites 'chain coral' that I found in the Silurian of Wisconsin. The rocks were soaked in diluted muriatic acid for several hours, to partially dissolve the matrix and reveal the chain corals.
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Silurian-Devonian Jawless Fish were Ecologically Diversified
LabRatKing posted a topic in Fossil News
Via Sci-News: Osteostraci, the jawless sister group to all jawed vertebrates, had adaptations for passive control of water flow around the body, according to new research led by the University of Bristol. http://www.sci-news.com/paleontology/ecologically-diversified-osteostraci-08916.html Full original paper-no paywall: Computational Fluid Dynamics Suggests Ecological Diversification among Stem-Gnathostomes https://www.cell.com/current-biology/fulltext/S0960-9822(20)31362-2 Generalized translation: Armored fish developed streamlining and passivecontrol surfaces adapted for efficiency while swimming, as in form over function. Also the big armored heads likely did not have much impact on the later development of jaws and related structures. Or, even simpler, these guys were really efficient at moving through the water even with big, heavy heads and the more modern mouth that evolved later did not necessarily result in greater numbers of different shapes among species. -
Worn brachiopod on top of a Eurypterid prosoma
Nautiloid posted a gallery image in Member Collections
From the album: Nautiloid’s Eurypterids and other Silurian fossils
Unknown sp. of brachiopod on a partial Eurypterus remipes prosoma Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Herkimer County, New York Collected 8/22/20 -
Hi everyone - My wife and I were thinking about going eurypterid hunting this weekend or next if the weather cooperates. I was wondering if anyone is willing to share any public sites found around the Buffalo area (I know the Williamsville member is exposed in many places around Buffalo). Of course, we would not share this info anyone. Also, if anyone will be out at a site - we could even meet you there. I have a geology background but know very little about this area. Thanks! Pete
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Found this shell in Bjärsjölagård Sweden, Silurian aged. Anybody know the species?
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I found this section of colonial coral in the Silurian of southern Indiana. I believe it is Arachnophyllum. Specimen is approxately 9x5x3 inches. Photos views are oblique, top & side cross-section showing laminae.
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From the album: Nautiloid’s Eurypterids and other Silurian fossils
Dolichopterus macrocheirus partial walking leg Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Collected 8/22/20 -
From the album: Nautiloid’s Eurypterids and other Silurian fossils
Assorted Eurypterus remipes and Pterygotus sp. parts Upper Silurian Bertie Group Fiddlers Green Formation Phelps member collected 8/22/20-
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What type of mollusk is this? Oyster? Bivalve?Internal mold. Silurian Thanks for any help.
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Halysites 'chain coral' from Silurian in Wisconsin, acid treatment
traveltip1 posted a topic in Fossil Hunting Trips
I found this rock containing a Halysites 'chain coral' in the Silurian of Wisconsin. I soaked it in diluted muriatic acid for a few hours to partially dissolve the matrix and reveal the silicified coral fossil. Photos are before and after acid treatment.
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I found this pretty little chain coral in southwest Michigan glacial drift a couple of days ago. I'm interested in whether it's possible to narrow the ID down between a Halysites species or another genus, like Quepora. My simplistic understanding is that coenenchymal tubules would indicate a Halysites species, so that's what I've been focusing on, although I know there are many other indicators, like size and shape of corallites. size of ranks, shape of luminae, structure of longitudinal tabulae, etc. This piece is probably too silicified to tell without thin sections, anyway, but I thought I'd throw the pics up, in case there's a coral person here who can help me interpret any diagnostic features they see. (The tape measure I tried to hold up in the last photo is cm) Many thanks!
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Greetings forum members! I was looking through the last rocks from my latest fossil hunt and I found this interesting piece. Its a partial Pterygotid body segment! I had broken it and I thought I had thrown it back but apparently I kept like 80% of it. I glued it back together as best I could last night and was looking more closely when I found something interesting. I’m not completely sure but I have a hunch that the one end of this fossil might have predation marks from a larger Pterygotid. Could this be true or did it just break weird when it was molted? I was wondering if anybody on the forum could help me out with this. Thanks for looking! Owen
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Hello all! As I’ve been taking a closer look at some of the rocks from my previous fossil hunt on August 22, I have been finding some pretty cool fossils that I overlooked at first. I am going to show some of the more interesting ones on this post. Enjoy! ~ Owen
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From the album: Nautiloid’s Eurypterids and other Silurian fossils
A mouth part from a juvenile Pterygotid Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member Herkimer County, New York Collected 8/22/20© Owen Yonkin 2020
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