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Showing results for tags 'silurian'.
Found 236 results
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Coralline red algae from the Silurian of Gotland is much older than previously thought
Kasia posted a topic in Fossil News
https://www.sciencedaily.com/releases/2019/01/190116111008.htm -
Okay, this is way, way out there, but it's a maybe. I am sitting on the fence for going real or mother nature. I was strolling around the mountains today. On an Silurian plateau I spied this piece of cherty material with what may or may not be a small crinoid. It is a bit banged up, kind of rusty looking, but seems like an immature crinoid??? Otherwise, a very interesting want-to-be. Material is missing from some areas which would have been helpful and it wraps around the edge of the rock making it challenging to photograph. On the entire chunk of rock there are no other features of note. Size from 8 on the ruler as it wraps around the other side comes out to about 35mm
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- sacramento mountains
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From the album Invertebrates
Graptolites non det. Silurian Vogtland Saxony Germany -
From the album Invertebrates
Graptolites non det. Silurian Vogtland Saxony Germany -
From the album Invertebrates
Graptolite non det. Silurian Vogtland Saxony Germany -
From the album Invertebrates
Graptolite non det "Pneumatocyst" Silurian Altmannsgrün Saxonia Germany The pneumatocyst was interpreted by Ruedemann, 1895 as a flotation device and indication of a planktic life style of the graptolites. -
Visiting some of the oldest fossils of Styria, Austria (Silurian orthocerids and brachiopods)
FranzBernhard posted a topic in Fossil Hunting Trips
Very small outcrops northwest of Graz are perhaps the richest site of Silurian fossils in Styria. There may be other sites with somewhat older macrofossils in Styria, but not as rich. The outcrops are part of the Palaeozoic of Graz, a thrust sheet within the Eastern Alps, composed or Silurian to Pennsylvanian sediments. It consists of three separate nappes, the outcrop and fossils presented here belong to the Eggenfeld-member of the Kötschberg-formation within the Rannach nappe. Geological map of Styria with the Palaeozoic of Graz situated north of Graz. The red X is the location of the fossil site. Geological and structural map of the Palaeozoic of Graz. Note that the colors of the Rannach facies and Hochlantsch facies have been accidentally interchanged, the red X is the location of the fossil site. From Gasser et al. (2009). Stratigraphy and facies distribution of the Palaeozoic of Graz. Kötschberg-formation is Nr. 10 (red X), thicknesses of formations are not to scale. From Gasser et al. (2009). The age of the Eggenfeld-member is, based on conodont data, upper Silurian (Ludlow, Pridoli) to lowermost Devonian (Lochkovian). What´s special about this site is the abundance of orthocerids in some only a few dm thick layers of grey to brown dolomite and dolomitic limestone that are intercalated with tuffitic rocks. And also somewhat special is the number of papers dealing with these very small and poor outcrops. The occurrence of orthocerids is known since the 1950ies, a good up-to-date (2010) summary is this paper, it mentions 16(!) nautiloid taxa, most of them orthocerids. Its in English and includes pics of fossils and a stratigraphic section: GPZ_Eggenfeld_Histon_2010.pdf These are the seven nautiloid genera figured in this paper, no species assignment was made.- 16 replies
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- brachiopods
- orthocerids
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Yesterday, New Year's Eve, I was running a few errands and decided to make a little detour to check out the old long abandoned Hawthorne Quarry in Chicago. Over the past few years I've been trying to obtain samples of Silurian fossil corals from the Chicagoland region and I've been waiting to check this locale off my list. The quarry was abandoned in 1915 and subsequently filled with garbage. But that doesn't necessarily mean old rocks from the quarry aren't still lying about. Here is a picture of the quarry in operation dated 1890. Here it is today ( or, rather, yesterday..) Garbage everywhere, imagine that! But certainly there must be some random fossiliferous rocks strewn about somewhere. As I was poking around, three gentlemen from the camp approached, very nice, and were curious who I was and what I was doing. They were a little confused when I tried to explain what I was doing and politely asked if I could spare a dollar. I gave them some cash and wished them a "happy new year". Continued my search. I turned over a large promising looking slab and found .... a hibernating snake and assorted creepy crawlies. I carefully replaced the slab and searched elsewhere. But, are there any fossils to be found here? After not finding much , I found a large muddy rock with crinoid fragments peeking out and decided to grab it. This is what I found after got home. Trilobite glabella? A large bivalve with coral Continued....
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A little Lower Silurian Collecting in Dalton, Georgia
Nimravis posted a topic in Fossil Hunting Trips
Today I made a quick stop on Dug Gap Mountain Road in Dalton, Georgia and did a little collecting in the Lower Silurian Red Mountain Formation. At this location you find imprints of shells, though I cannot find any information on them.- 6 replies
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- shell imprints
- georgia
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THES about 10 MB generally quoted as being "unpublished" Fredrik Jerre: Silurian Conulariids from the Visby Beds,Gotland Examensarbeten I Geologi vid Lunds Univeristet,1988/n.25 recommended
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- conulariid
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Notice preliminaire Joachim Barrande:Sur le Systeme Silurien et les Trilobites de Boheme Text only,about 6,6 MB LINK Systeme Silurien du Centre de la Boheme Premiere partie:Recherches paleontologiques vol 1: planches Crustacees etTrilobites (plates/Atlas)..........ABOUT 20,8 MB systemesilurienbarrande supplement au volume 1: Trilobites,crustacees diverses et Poissons size: about 15,5 Mb LEGAL STATUS:out of copyright aetiology(why go look for it?): total annoyance at seeing this thing cited so often and not having it For a mid-nineteenth century monograph ,this is still quite often cited. Needless to say that the taxonomy should be viewed with some circumspection some reasons why these are famous volumes:
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Question about the division between time periods. Ordovician vs. Silurian
Recker posted a topic in Questions & Answers
I have a question about the different time periods, I live in Southeast Indiana, Whitewater river area, within the Cincinnati region and Ordovician period. Having a hard time understanding this, will I only find Ordovician period fossils or could I find later period fossils like Silurian fossils? And why? You all have been so helpful and I appreciate it. Linda -
Hello kind folks of the fossil forum, I recently had the opportunity to take photos of some of the more rare/unknown fossils found in the fiddlers green member of the Bertie group. All these fossils came from Lang’s quarry in Ilion, New York and are not Eurypterids. I was given permission from Al Lang himself to post these photos. These are from his personal collection. He does like his privacy and doesn’t like people showing up out of the blue. I’m lucky to have met him and received an invitation. I’ll stress this was a huge stroke of luck and he doesn’t often have or want visitors. He was kind enough to let me show these photos, so let’s appreciate this opportunity together. Some of these fossils have been seen by very few people. I was also allowed to take photos of his Dolichopterous specimens which are also exceedingly rare but they will go under a different category on the forum at another time. Now some of these can be found in ontario at the ridgemount quarry but keep in mind these are from a different layer than the Eurypterids found in central New York. The stratigraphy is slightly different across the state. Either way, at least some of these may be described....some maybe not? Photos to come. im going to post the pics together with 2-3 grouped together if they are the same and I’ll separate photos if they are loners. This will make it easier for people to quote photos.
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- silurian
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Silurian goodness, hash plates, matrix, corals
JohnBrewer posted a topic in Member Fossil Trades Bulletin Board
Hi folks A selection of Silurian goodies. In exchange, I'm looking for dino teeth (NOT Moroccan unless exceptionally pretty). Overall images. Oh, Roman coin included for size. Coin is 1cm- 16 replies
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- coral
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For all of us that are feeling the the effects of crystallized hydrogen dioxide here's a photo of a Silurian-Bloomsburg Formation shale bed (this frame of view is about 3 sq/ft). The hillside road cut site is few miles from me and a great place to sit on a sunny afternoon. Here's the fun part this spot is loaded with weathering out brachipods, coiled & spiraled gastropods, straight shelled cephalopods, corals, crinoids etc. I collected over 15 different fossils from this one site. Most (except the cephalopods & some corals) are small enough to sit on a fingernail with room to spare! Have fun on a virtual (photo) fossil hunt.
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- brachipods
- bloomsburg/mifflintown frmn
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Hi, I am wondering what the white globular mineral growths are on this dolomitized Dawsonoceras mold. Calcite? Thanks for any help.
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I just relocated an unusual fossil that had been lost in some shoebox deposits. It appears to be a slightly crushed blastoid, but otherwise well preserved. It is pink colored and may be replaced with dolomite. I found it several years ago in Sumner County, TN at a place called South Tunnel. The site is a railroad cut exposing the Laurel Limestone and a few feet of Waldron Shale at the top, both middle Silurian in age. The rock had fallen out of the cut, but the extremely hard limestone looks like typical Laurel, a dolomitic limestone with very few fossils other than a few crinoid stem segments and the occasional brachiopod. I have been trying to identify it, but I'm not finding much info on Silurian blastoids. From my searches, there seems to be only one known blastoid species from the upper Laurel at St. Paul, Indiana, which is a Troostocrinus sp. Over several years of fossil hunting the area, I have never found anything even slightly similar in any Silurian deposits. Hoping someone here may have some idea what it is.
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- tennessee
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I found this specimen at Oaks Quarry Park in Fairborn Ohio. All of the rocks there were Silurian. In the 3rd picture at the top there are dolomite (or calcite) crystals. Any help would be much appreciated.
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Until I am able to start a Gallery Page I am going to fetaure some of my Waldron Shale specimens. Featured here is one of only a few known specimens of a complete Eucalyptocrinites crassus complete with root system. I collected this specimen near the type locality in Shelby County, Indiana. I prepared 90 percent of this specimen with some final matrix work being done by Scott Vergiels. Specimen measures 8 inches high.
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- silurian
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I have two items on which I am requesting opinions. These are from a dolomitic nodule from the Schoolcraft Fm. in the upper peninsula of Michigan. The first one I think is a pygidium of the trilobite Scutellum. (note there appear to be some other trilo"bits" surrounding it). @piranha, what do you think? Here is an image from Ehlers (1973) Stratigraphy of the Niagaran Series of the Northern Peninsula of Michigan that he has as Scutellum laphami.
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- trilobite
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A few things from the Silurian (Llandovery) Cotton Formation near Forbes, NSW Australia. Most of these specimens are currently undescribed, but a paper will be released on them soon. One of my strophomenid brachiopods from the site will be in the paper, so I'll post it when it comes out, since they're a pain to photograph. The rare Aulacopleura pogsoni ....
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Paper describing A. pogsoni - https://www.researchgate.net/publication/236011643_Early_Silurian_Llandovery_trilobites_from_the_Cotton_Formation_near_Forbes_New_South_Wales_Australia
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- llandovery
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Hi, can anyone lead me on determining this species of brachiopod? This brachiopod originates from the Reynales Formation, Clinton Group of Hamilton, Ontario from the Niagara Escarpment. A name I found for this shell is Stricklandia canadensis when I was reading a document about the Escarpment, though when I went to the fossiilid.info and the fossilworks websites there is no mention of the species. I began to think this could be a Stricklandia lens. The shell in the centre is approximately 4 cm long.
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- brachiopod
- pentamerid
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After going around in Hamilton, Ontario looking for a river/creek to check out the iconic Niagara Escarpment of the city, I decided to check out the Devil’s Punch Bowl which is located in Stoney Creek, Hamilton. Most of the waterfalls located in the old city of Hamilton are out of reach/barricaded/no-go zones with fines for trespassing because of safety reasons. Nearby Albion Falls and other waterfalls like Tiffany and Chedoke in the old city of Hamilton cannot be explored close up because of the tourists and locals that have died and severely injured themselves from falling while on the cascading waterfall. Today I was surprised to realize that the bottom of the Devil’s Punch Bowl was unbarricaded and so off I went to explore it. It seems the only place that tourists and people go to when visiting the Devil’s Punch Bowl is the observation deck at the top of the falls which offers a nice view of the falls. This is evident as I noticed that there was barely any trash at the bottom of the gorge and down river. The height of this falls is 37 metres. Today the fall is dry with no water. Theres a large Timmy’s cup on the bottom right for size comparison (it isn’t mine though!). There are various formation in this rock exposure of the falls and assigning loose rocks from the ground to the right formation can be a hassle.
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- grimsby formation
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a recognized classic Indispensable! Worsley,Aarhus et al:The Silurian Succession of the Oslo Region NGU Bull.384,1983 ABOuT 7,5 MB NB: NO fossils are figured,the emphasis is on local correlation and stratigraphy
