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The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these groups are extinct or severely reduced in importance and brachiopods never quite recover. Also, the Devonian is the last time we see trilobites with such variation, large sizes and numbers and orthocerids too are much more uncommon after the rise of the goniatites. The massive tabulate coral reefs also disappear after the Devonian. Fascinating period and I hope to share some of its wonders with you. Equally, a lot of this is rather new to me, so I would be very grateful for any assistance, corrections or further information on my specimens. Thank you. The Early Devonian epoch is split into three stages, so let's start with the first of those, the Lochkovian, that began about 419 mya and finished roughly 411 mya. I have been sent a nice selection of brachiopods from the Kalkberg Formation, Helderberg Group by the Mighty @Misha, mostly. But the kind gentleperson also sent me this fascinating little bryozoan hash : It is dominated by fenestellids, which is usually the case in the Devonian, but other orders sill occur. These ones, I think, are Fenestella, but there are so many species in the formation that I wont take a guess as to species : Not sure what this one is ;
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- cordillera cantabrica
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From the album: Lower Carboniferous fossils of Ireland
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I drive 8 hours with a friend to a location he remembers from his childhood as yielding a lot. Oh boy it did. 100% worth the drive. Lake Huron, among the agates, pyrite, yooperlite, has some extraordinary Devonian fossils. All fossils were collected from the beach of his family’s property except for the fenestelid bryozoan, which was found at a gas station on the way there. please enjoy this collection of gastropods, petoskey stones, various tabulate corals, crinoids, stromatoporoids, bivalves, Brachiopods, tenteculites, horn corals, an unidentified agatized fossil in jasper matrix, and a pudding stone I felt like showing off too. Thanks! I highly recommend the area.
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Over labor day weekend my wife and I decided to go camping at Crystal lake in the big snowy mountains near Lewiston Mt. We got there late Friday night to get a camping spot and Saturdays morning we decided to hike to some Ice caves that were 5 miles away. Along which there were ample exporsures of mississipian madison limestone. About a mile in I turned over a rock during a water break and there was my first brachiopod. Now that we knew what were were looking for we kept our eyes peeled and were rewarded with this large hash plate full of brachiopods that I think some are spirifera. 100 feet further and my wife found this large hash plate that was much to big to carry but had some large external molds on it. I was thrilled with what we had found so far but got even better in the format of some gorgeous and delicious sarcodon imbricatus, and some dried out ramaria coral mushrooms The later of which has several edible and poisonous species. We finally made it to the Ice caves and were rewarded with one of the most beautiful ice caves I've ever seen. The way back was uneventful with the exception of my dog Koda who got a little tired and needed to be carried for a while. The next day we hiked around crystal lake and enjoyed the views as well as fitting in a little more fossil hunting where we found a very pretty fenestella specimen, a plate with a bit of coral? And my wife found a rock that looked to be covered in tiny crinoid columns. While that was the end of hunting on Monday we drove out to Jordan to meet a lovely rancher and TFF member whom I bought some plaster jackets from to work on while my wife is on her clinical rotations for PA school all winter. I will make another post in the preparation section when I get around to working on them. But they they appear to be a hadrosaurid pubis and a bundle of ribs that might be pachycephalosaurus according to the seller.
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Hello all! I found this pretty cool bryozoan back in July and I decided to give it a prep. Its really easy matrix to work with so its good practice for someone like me who’s only done a handful of preps. Like my past preparations, this will all be done manually using mainly safety pins. Fenestella sp. ? Middle Devonian Hamilton Group Moscow Formation Windom Shale DSR, Lebanon, NY Enjoy!
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From the album: Lower Devonian Helderberg Group in Eastern NY
Fenestella crebipora from the New Scotland Formation.-
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I am studying a tiny area of a fossiliferous limestone rock from our yard and trying to determine the different items in it. The fan shaped item in the lower left corner didn't really look like the fenestella bryozoa that I am used to seeing, so I did a bit of research. I found a page with a similar image and was wondering if I am correct (or even close) in identifying that particular item as a cheilostome? Here is the page I was looking at: https://www.researchgate.net/figure/A-sample-of-bryozoa-sand-sample-number-71-from-a-depth-of-130-m-on-the-Lacepede-Shelf_fig1_238417060. Would the fenestella bryozoa be seen next to the cheilostomes? And what about the little flower like item that is above and to the right of the fan shaped item? It's kind of hard to see - I can circle it if needed. This area covered by this image is approximately 2cm across. That is what caught my eye - how tiny the fan shaped item was. This rock is from Huntsville, AL. Thanks guys and gals!!
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I am trying to wrap my head around what these things looked like in "real life" so I can recognize them better. This is a limestone rock with what I think are fenestella bryozoan fossils, found in Huntsville, AL. Mississipian age. This photo is looking down at what I call the "top" of the rock. The next photo will be from the side, looking at the same area but from the "inside" of the rock. Can anyone point me to a site where I might find a diagram of these to better help me understand what they looked like? Thanks! Ramona
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This is my first post in the Fossil ID section - I am SO excited to find this resource! A have found a few very helpful folks in other places, but this group is a huge wealth of information! A bit of background - we moved into a house just outside of the city limits of Huntsville, AL, a couple of months ago. After finding a couple of fossils laying around in the yard, I decided to investigate the wooded area at the back of our property a bit more. Whoa!!! There is a creek bed on the property and the closer you walk to the creek the more rocks you have to walk over. Every single rock I picked up had some kind of fossil in it. The sides of the creek have rocks embedded in them, too. It seems like someone may have looked around a bit in the past (found a small pile of rocks) but many (MANY) of these rocks are in their natural state. Most of them, in fact. It seems overwhelming to me, but I have been delving into understanding the treasures I am finding. I don't understand all of the classification systems, but I found a place online that seems to indicate that we are in the Mississipian Age? The rocks which have been identified so far are all limestone, so I am assuming this one is limestone as well. The soil is VERY red (someone called it ochre red?) and some of it always remains on the rocks after I clean them. The fossils that have been identified so far are fenestella, bryzoan, crinoid. And I think the word fossiliferous was also used? I am a photographer by trade and macro photography is my FAVORITE, so I will post plenty of photos. This particular rock is a very small one compared to most of them. It is also harder than the other ones I have worked with - less "crumbly". The first couple of photos are of the top and the bottom of the rock, to get a general idea of the size and shape of it. The rest of the images are close ups of various areas. Any and all input is appreciated! Is it common to find an area like this where rocks such as this one are very abundant? From what I can tell these are all common fossils, but a great springboard for learning! Hints on how to clean and store the rocks appreciated, too, since there are so very many of them? Thanks!! Ramona
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Tonight I found a new limestone ledge sitting 6 inches from a stream water level. My father and I started hammering away at the shallow edges and removed a ton of interesting specimens. While there were some nice cephalopods, lots of brachiopods and clams, this piece caught my eye. I’ve read about Bryozoa and I’ve seen similar things on fossil plates. I believe I remember seeing pieces of them in limestone while digging, but never anything big. So, is it a Fenestella? Or something else? I’ve never found one worth showing. I saw a species list for it and it is very long.
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- pennsylvanian
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A small colony surrounded by Archaeocidaris debris. It shows the obverse side , i.e. the side with pores. It is preserved on the top face of a thin limestone lens that was overlain by shale. This is the most common fenestrate bryozoan in this area but the majority of specimens are found in shale and rarely split to show the obverse as it is the "stickier" side due to the pores.
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