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A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
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- amplexopora
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The thread http://www.thefossilforum.com/index.php?/topic/84678-adams-silurian/ was getting rather enormous, so I have decided to leave that one to deal with the Llandovery and Wenlock and put my specimens from the Late / Upper Silurian here, though I don't have a great deal of material from the Ludlow and Pridoli yet. However, I do still have some jolly nice specimens to show off here. Here are my other collection threads for the Cambrian and Ordovician ; http://www.thefossilforum.com/index.php?/topic/78887-adams-cambrian/&tab=comments#comment-832018 and : http://www.thefossilforum.com/index.php?/topic/78974-adams-ordovician/&tab=comments#comment-832912 In the mid 1980's, on the way home from one of my annual visits to the Hay-on-Wye second-hand bookshops, I managed to persuade my girlfriend at the time to take a bit of a detour and stop off at a roadcuttting just outside Aymestrey,, Herefordshire in the Welsh Borderlands. The rock here is the Aymestry (sic) Limestone Formation, part of the Upper Bringewood Beds and is Gorstian, Lower Ludlow in age, so about 426 mya and a little younger than the Much Wenlock Shale Formation. Many species of coral, trilobites and brachiopods found in the formation are the same as those found at Dudley, but the bed is noted for its massive numbers of the brachiopod Kirkidium knighti (was K. knightii),a lovely, large pentamerid. In fact, during my hour or so searching, I found almost nothing but this species, the only exception being a couple of Atrypa reticularis. The problem was that this limestone is thick and seriously hard, even the broken bits are generally huge, but I managed to obtain half a dozen reasonable specimens and about the same number of fragments. Over the years I have traded, given away or sold them, so that now I only have the best one left. Here is Kirkidium knighti : It's a shame the tip of the beak is broken off : I make index cards for all my fossils, this is the one I made for the specimens at the time, back in the mid 1980's : And today's version : There was a minor extinction between the Wenlock and the Ludlow, known as the Mulde event and it is often said to have primarily effected graptolites and conodonts, but it seems to me it had a massive impact on the bryozoan faunas of the time too. Gone are the varied stony stick and mound trepostomes that made up such an integral part of many faunas from the Middle Ordovician through to the Middle Silurian and even cystoporid groups such as the Constellariidae became extinct at this time. Trepostomes and cystoporids did survive until the end of the Triassic, but were never as important again, the bryozoan faunas would start to become dominated by fenestrids in the Devonian, though they reached their peak of diversity and distribution in the Carboniferous. I will look closely at my limited number of rocks, but I don't think I have a single Late Silurian bryozoan. I know our friend @Mainefossils studies the Late Silurian Leighton Formation in microscopic detail, but I can't recall him posting any bryozoans. Are there any, Asher, old chap? Interesting.
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- leurocycloceras
- leurocycloceras imbricatum
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- merista tennesseensis
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- microsphaeridiorhynchus nucula
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- poland
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- protochonetes ludloviensis
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- spirifer (delthyris) elevatus
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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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- aguion formation
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- leptaena acuticuspidata
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- leptotrypella
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From the album: Trilobites
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- corynexochid
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Day Two ; Locality Two (or Seven if you include Day One) Prepping and Retail, Erfoud, Morocco. 20th February 2019 Erfoud town itself is famous for its beautiful fossils, its skilled fossil preppers and also for its wide variety of fakes, composites, good and bad repair jobs and utter frankenfossils. A large percentage of fossils from Morocco that are available in shops and on the internet the world over originate from here or pass through the place. Fossils are sent here for prepping from all over the south and then sent from here everywhere in the country and abroad. There are many little shops, prepping centres with huge attached shops and 'museums which are really pretty much just shops as well. Top Tip :The prices here are about ten times the price of the prices in the little shacks on the edge of town or elsewhere in Morocco, but haggling can reduce the cost significantly. Many places have 'fixed' prices, but they're actually always negotiable. This time, we went to the one my friend Anouar, who is a tour guide, takes his tourists and I was asked politely not to accuse the owners and chap who'd show us around and do the chat, of having fakes or wrong info, so i had to bite my lip. We asked if it was okay to take photos and they said yes, which I was surprised about, but I guess it was because Anouar was going to use photos for his own purposes and this would involve advertising the shop. Top Tip : You will see a lot of fixed prices in Moroccan Dirham in the pieces and shelves. Divide by ten to have a price in US dollars. Because we were with Anouar, we were told everything is 50% of the marked price, but I suspect they often do this anyway, "Special Berber prices, today only". I've heard that before. And you can still haggle to get something way under that 50% and you just know they'll still be making a good profit. I didn't buy anything. Little local stores are more my line anyway - I rarely shop in supermarkets. Here is the entrance where you can see huge plates ready for prepping and polishing, some have been cut into pieces and they glued back together it seems to me, I know this happens with the crinoid beds, so i guess it's true of the orthocerid and goniatite stuff too. Some just look cobbled together because of the circular saw marks when cutting out upper layers.With these, polishing will remove the grid lines. These sheets are from the local area and contain the goniatites and orthoconic nautiloids we were walking on earlier, but from a better quality, less eroded and distorted source. Famennian, Upper Devonian, I think. This photo shows one of the trenches they dig to reach the best quality material, similar to the ones i was walking along earlier this day : Below, somebody walking on the slabs and some maps of the the world at different times in it's past, showing continental drift. : Notice these are not the famous black orthocerid marbles that come from elsewhere. The picture of Spinosaurus is a bit misleading, as you all know, it's not found in these marbles or in the Erfoud area. In fact there is very little Kem Kem material available here these days, though there was in the past. I suspect the Kem Kem area probably has it's own facillities nowadays.
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Day Two ; Locality One (or Six if you include Day One) Black Sahara, South of Erfoud 20th February 2019 Well this is where things really get interesting, so stick with this thread as there are dozens of photos of fossils coming up. Looks at the tags if you want clues. I was up bright and early and wandered out at about 7 am to watch the sun rise over the still mighty Erg Chebbi dunes. And as night's candles were burnt out and jocund day stood tiptoe over the misty duney tops, the chaps came to join me and managed lots of photos. Here's one, if you would like to see more, I'm busy posting a kazillion of 'em under the Nature Photography thread.
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- asaphellus
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- rhombiferan
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- upper silurian
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From the album: My collection in progress
Manticoceras sinuosum Hall 1843 Location: Erfoud, Morocco Age: 383 - 359 Mya (Upper Devonian) Measurements: 7,2 cm (diameter) Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Cephalopoda Subclass: Ammonoidea Order: Agoniatitida Suborder: Gephuroceratina Family: Gephuroceratidae-
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I bought this out of curiosity and because I think it's rather beautiful. It was sold as a bryozoan which it clearly isn't though you can see why it was. It seems to be a diploporitan echinoderm, showing internal structure of plates (humatipores) and a small area of the external layer with diplopores. The location is given as Tafilalet region, Erfoud area, Anti-Atlas Mountains. My questions are: 1) is it Devonian (as sold) or perhaps Ordovician? Both are possible for the area - I've read that Devonian diploporitans occur in Morocco. These would be sphaeronitidae - the only group to survive into the Devonian. 2) Has anyone come across anything similar from Morocco, or indeed elsewhere, and can you narrow down the ID? Back surface, showing that it consists of articulated plates (these are the same plates as the other side, it's not a compressed hollow specimen). patch of diplopores: Ramifying humatipore respiratory structures: Closeup of plates showing pustular ornament:
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Dear TFF, This trilobite ( max. 36 mm) is probably from Erfoud area, Morocco. I believe it will be recognisedby our Trilobita experts. Thank you very much.
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Real trilobite? specie?
DatFossilBoy posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hi. I saw this nice trilobite online and I was wondering If it was real. I can see details on the eyes,a good sign. What specie could it be? What do you think?Here are some pictures. Thanks so much. Regards. -
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Trying to find a definitive identification for this nautiloid? Anyone know of any science-based paper online to refer to the Ma'der region of Morocco during this period of time and the cephalopod fauna? Any info appreciated. Devonian section in the Tafilalt, Ma'der region, Anti-Atlas, Morocco. (Clymenia genus ammonoid? do they get this large and the chamber/whorls are very similar to nautiloids)
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- cephalopod
- erfoud
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Hello Fossil Forum! First time post but been a reader for a while now. I just got back from my honeymoon in Morocco and of course along the way stopped in Erfoud to look at fossils. We went specifically to Macro Fossiles Kasbah where they had a huge selection of fossils and fossils-turned-into-home-goods (sinks, table-tops, etc.). There were huge sheets of fossils, a cutting and polishing area, etc. It seemed legit and I was walking around with the owner for an hour, Raffa, whose dad had owned the place since the 70s. He was very enthusiastic when I showed interest and had a (very rough compared to this forum) knowledge of what we were looking at. At any rate, I picked up two pieces that I would love your opinions on. Both from a specific-identification perspective and a quality / validity perspective. Obviously we have one trilobite and one crinoid. From my eyes I can tell the Crinoid is a composite of what seems to be a few pieces with a bit of filler in there. Not ideal but I love that it's one animal in focus for a smaller piece like this. The stone you see is 14" tall. The spiny trilobite he kept in his office and only showed me after a longer conversation. I believe it to be real and a fairly good example considering its age. The stone you see is 10" tall. Would love opinions on specific species and thoughts on the prep quality. Plan on mounting these vertically in custom frames for a larger specimen wall and hope I made a couple wise purchases! Thanks in advance for your thoughts.
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I am from erfoud morocco, this city is a bank of fossil rare, so I am very interested by fossils ammonite and trilobite plus other types, also I am available to search for fossils with an exact description for anyone, Thank you all.