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Showing results for tags 'Devonian'.
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I'm currently working on a simulation of extinct biomes, i'm slowly learning how to make everything as realistic as possible for realtime 3d simulation. I would like to start with plants recreated from some Silurian, lower devonian and upper devonian, and slowly working to recreating the biomes in the areas where they lived and later i'l like to add animals aswell. All my research is made with google i'm not a professional in archeology or 3d art, some of the models are very simple and unpolished for now and will be updated. The project is in the early stages for now but it runs very well on most pc's Here are ome of the plants that lived in the late devonian Tetraxylopteris and leaf detail Archeopteris and branch detail Calamophyton Protolepidodendropsis Uang (China) Weylandia rhenana Aneurophyton Wattieza Leclercqia
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From the album: Mahatango Formation
Schyukill county, Niss Hollow member? -
Here is a quick and (hopefully) easy question for all you Penn Dixie (New York, Erie County) or bivalve experts out there. In going through some of the material I collected last summer, I came across this very nice, but small (1.1 X 1.0 CM) bivalve. It looks most like Lunulicardium eriensis figured on page 160/161 of Wilsons Field Guide to the Fossil of New York. But the book lists it as from the Upper Devonian Canadaway Group and I can't seem to find any reference to it (after a quick search) from the Middle Devonian Moscow Group present at Penn Dixie. My question is: is my ID incorrect or did I just not dig deep enough to find reference to it from Penn Dixie or the Middle Devonian? Thanks for any help. @Fossildude19 @Kane, @Jeffrey P and any others.
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From the album: Nautiloid’s Trilobite Collection
A nice example of B. lucasensis from the Middle Devonian Silica Shale of Ohio. I've been looking for one of these for a while!- 1 comment
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Hello to all. The Acastella trilobite from my own collection. Well preserved. I tried to get close-ups of the eyes and some small details. Place of discovery: outskirts of the city of Kamenets-Podolsky, Khmelnitsky region of Ukraine. It was not possible to determine the exact age (Silurian or Devonian). Have a nice day 1.mp4 3.mp4 4.mp4
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Dear everyone, I would like to hear your ideas on preparing a fish fossil from Turso, Scotland (Devonian). I am unsure of the best approach. The fossil was embedded between two layers of hard rock. The impression on one side is not entirely clear; the other side is not entirely complete (90% is there). Additionally, fish fillet has fallen out, and I have many loose pieces such as the fins, which are very thin and have matrix (grains) attached. I have been contemplating soaking the small loose pieces in acid (5%) and then rejoining them. For the larger pieces, I plan to reattach them and clean them using an air scribe and sandblaster (2.5 mohs). Another idea is to place the pieces in their original positions and create a replica on the opposite side using epoxy or cement, although this doesn't seem aesthetically pleasing to me. The tools at my disposal include: - Magnifying glass - Air scribe - Engraving pen Dremel - Dremel - Sandblaster - Sulfuric acid 100% - Cleaning vinegar I appreciate your input and suggestions. Kind regards,
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From the album: Invertebrates
Encrinaster roemeri Schoendorf, 1910 Early Devonian Emsian Kaub Formation Bundenbach Rhineland Palatinate Germany -
First post, long lurker! I found this fossil a while back at the well known Lost River outcrop on old Route 55 near Wardensville. It’s about an inch tall and across, and has an intricate, almost web-like pattern when you look close enough (my camera has a hard time picking it up!) I thought it may have been some kind of coral or bryozoan - but someone mentioned it may be a Hyneria scale or scale of some similar fashion, and that I should ask here. Any ideas guys? Thanks!
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It was such a pleasure to meet Jimmy Houston, famous fisherman and outdoorsman, and to collect a few fossils from his property. This shadow box preserves the memories of that day!
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QUARTETnary - A card game about the geological time scale
paleoflor posted a topic in Members' News & Diversions
L.S., Wanted to raise some awareness on TFF because I expect many here will simply love this: A good friend of mine, Iris van Zelst (geophysicist at the German Aerospace Center in Berlin) has developed this really nice card game centred around the geological time scale: QUARTETnary The gameplay is based on the classic game Quartets (similar to Go Fish and Happy Families), where players try to collect as many sets of four cards as they can. In QUARTETnary, each of the sets represents four major events that took place during a specific geological time period. To win the game, you need to create the most complete timeline of Earth history, all the way from its formation 4.567 billion years ago to the appearance of us humans. The cards have been designed by Lucia Perez-Diaz (Earth scientist and freelance illustrator from the UK). The illustrations look amazing and I really like that they adhered to the official colour scheme of the International Commission on Stratigraphy. Iris sent me this nice set of cards for the Proterozoic: The game includes 15 sets of four cards in total (many featuring fossils): one each for the Hadean, Archean and Proterozoic eons, and one each for the 12 periods of the Phanerozoic. I expect QUARTETnary will become a really fun way to learn about and memorize the different geological units and major events in Earth history. Kind regards, Tim
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From the album: Trilobites
Taxonomy: Greenops widdernesis Age: M. Devonian Location: Arkona, ON (Widder Fm) Source: Self collected. Remarks: Prepared by Malcolm Thornley. Specimen is complete and intact apart from some minor pleural damage on right side. -
From the album: Trilobites
purchased. -
Zosterophyllum rhenanum Kräusel & Weyland, 1935
oilshale posted a gallery image in Member Collections
From the album: Plants
Zosterophyllum rhenanum Kräusel & Weyland, 1935 Early Devonian Brohltal Germany -
A question about the brachiopods Paraspirifer bownockeri
Misha posted a topic in Questions & Answers
Hello everyone, I have been wondering about this for a bit but only now that I atually have one of these in my collections have I decided to ask this, All of the P. bownockeri I have seen have been pyritized and I wanted to ask why this is, I do not know of any other brachiopods like this because while there are some I have seen preserved in pyrite they are from areas where the rest of the fossils are also pyritized, from what I have seen its mostly just this species that is commonly found fully pyritized from this formation. The only thing I can think of is maybe they are found in a specific layer which is why they are the ones that are primarily pyritized. So my question is, what causes this? Also do these brachiopods come preserved in other mineral such as calcite? If anyone knows or has any useful sources I would love to hear it! Thank you very much, Misha- 7 replies
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Found this a couple years ago near Deer Lake, PA. The site is a Devonian aged Mahantango formation location. I split the rock and this was inside. The left and right halves fit together. The specimen is about 5 cm from top to bottom and about 2 cm across. The dimpling pattern is what intrigues me the most. Could it be a type of sponge?
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From the album: Invertebrates
Bundenbachia beneckei STUERTZ, 1886 Early Devonian Early Emsian Bundenbach Rhineland-Palatinate Germany -
Today, I went on a quick early morning fossilhunt. I have been anxious to get out hunting, any chance I can considering how mild winter has been so far. I decided it would be best to start today with little, to no expectations and just see what the day would bring. At about 3:30am I woke up to use the bathroom and when I played back down all I could do was toss and turn. So I did that until about 5:15 and I finally got up. Got to the hunting grounds about 7am, just as the sun was making it's presence known. Unfortunately it was only 20° at the site. There was some snow covering the site as well as ice. Obviously this made digging and splitting slabs a real chore. So much so the there wasn't a whole lot I could do. I was hoping that with the sun out maybe it would eventually warm things up enough to make digging a little easier. So for the first 2 hours i kinda putzed around surface scanning and flipping slabs over, looking for something worthwhile. Eventually I started trying to remove slabs. I was actually starting to make a bit of progress, but then the ground got hard again. While trying to remove the slabs, I picked up a small chunk of matrix that fell off. As I inspected the piece carefully I noticed a small Dipluera pygidium and partial thorax exposed on the very edge of the break. I could tell that the rest of it was underneath some matrix. I would of normally been static but the area where the Dipleura was sitting was pretty fractured and I didn't really think I was going to be able to extract it without the whole thing crumbling apart. But I put it in the truck and decided to give it a shot when I got back home. Other then that I only brought home a bivalve and a brachiopod. There really wasn't anything else worth keeping. When I got home I inspected the trilo very carefully and looked at every fracture going around it, I started breaking off small bits of matrix till it got to the point where all that was left was the portion covering the front half of the trilo. I took my angle grinder and made a notch. Then I took a screwdriver, twisted and popped off the top! That is when I got very excited! Now I have found Dipleuras smaller then this one, but this is the smallest one the I have found in this good of condition. It measures at 1 7/16 of an inch. Totally made the trip worth it! Here is before and after pics.
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From the album: Old Port Formation
Extremely rare trilobite from the Old Port formation of Pennsylvania. -
From the album: Mahatango Formation
Nis Hollow member, Schykill county -
From the album: Mahatango Formation
Undetermined crinoid, niss hollow member. -
While researching what caused the current invertebrate fossil of the month to have such a wonderful iridescence (www.thefossilforum.com), I came across some interesting info on preservation of color patterns in fossil shells. In Northern California where I live, most of the color of a fossil shell disappears after a few thousand years. The pattern of color is gone in a couple million years. While in Texas, I collected Texigryphea from the early Cretaceous that still had color patterns of dark radial bands. Finding a paper about Devonian brachiopods with color patterns surprised me. See: http://www.bioone.org/doi/full/10.4202/app.2010.0066 “First Colour-Patterned Strophomenide Brachiopod from the Earliest Devonian of Podolia, Ukraine” by Andrzej Baliński, found in Acta Palaeontologica Polonica 55(4):695-700. 2010. The first figure below shows the spotted pattern found on the convex shell of a strophomenid brachiopod from Ukraine. Wow, what a camouflage! The brachiopods blended right in against the light-colored rock with dark spots. I am reminded of well camouflaged modern mottled and spotted moths that are hard to see when they are on certain trees and rocks. The second figure shows a variety of color patterns found in fossil brachiopods. The paper suggests that brachiopods with colors and patterns occur in shallow water in the photic zone and in areas with warmer water. Few are found in cold polar waters. A similar distribution of colored shells and mollusks exists today. Shallow tropical species are very colorful while polar and deep water species are not. Show us some of your older fossil shells with colored patterns: Cretaceous and older.
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Gyracanthus is a cartilagenous gnathostome possibly a stem or sister clade to the Chondrichthyans. Most common fossils found are the fin spines but scapulocoracoids are not uncommon. Fossils here are result of collecting over 8 years from 2013. diagnosis.—Medium-sized gyracanthid fish, maximum estimated body length approximately 1 meter. Maximum fin spine length estimated 375 mm. Ridge width constant at maturity, ridge width constant along insertion-exsertion boundary at maturity, interridge width equal to or less than ridge width. Cristate tubercles ≤2 mm height, ≤2mm width, 9-11/cm proximally on pectoral fin spines, 8/ cm proximally on pelvic fin spines, 15/cm proximally on dorsal fin spines where preserved. Major and minor axes on tubercle, apex oriented oblique to underlying ridge. Pectoral fin spine inserted approximately one-third the length of the fin spine, ridge width constant along insertion-exsertion boundary at maturity, maximum fin spine ridge chevron angle along leading edge 90°, ornamented ridge dorsal to posteromedial groove. Two types of pelvic fin spines, one narrower with extensive exserted area, one wider and more robust with extensive inserted area, both with inserted area extending greater than half the length of the spine. Pelvic fin spine ridges curved retrorse towards midline. Median fin spines approximately symmetrical, comparable to paired fin spines but smaller and straighter distinct anterior and posterior dorsal fin spines. Prepectoral ventral plate with more than 30 tubercle rows, largely subparallel, some bifurcating, curving to the middle only at the extrema, convergent towards the lateral edge; prepectoral ventral plate inserted area at least a third of the width of the plate.
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Taxonomy from Fossilworks.com. Alternative combination: Aspidosoma roemeri. Description from Südkamp, 2017, p. 134: "Encrinaster has many characteristics common with Euzonosoma. The differences are as follows. The elongated arms are strap-like, broadening distally until the disc edge and then tapering evenly as comparatively narrow arms to the arm tips. The interradial disc outline is convex to straight. The marginals are flat overlapping plates. The ambulacrals are more delicate, less rectangular than in Euzonosoma, and more sub-triangular in oral view." Identified by oilshale using Südkamp 2017. References: Schöndorf, F. (1910) Palaeozoische Seesterne Deutschlands. II. Die Aspidosomatiden des deutschen Unterdevon. Palaeontographica 57:1-63. Lehmann, W.M. (1957) Die Asterozoen in den Dachschiefern des rheinischen Unterdevons. Abhandlungen des Hessischen Landesamtes für Bodenforschung 21:1-160 Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.
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I have this unnamed moroccan tilobite in my collection , now i want to know If somebody knows the exact species. I've done a little bit of research and found two species that match very well : Holladorps and Minicryphaeus Quaterspinosus . Or i am completly wrong and its a complete different species Length of the trilobite : 5 cm Found in : Erfoud, morocco
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Two excellent papers about the Early Devonian of Podolia References: VICTOR VOICHYSHYN (2011): THE EARLY DEVONIAN ARMOURED AGNATHANS OF PODOLIA, UKRAINE. PALAEONTOLOGIA POLONICA, No. 66, 2011, pp 1-211. Voichyshyn V.K. (2015): Devonian Fish Fauna. – Lviv, 2015. – 310 p. (Scientific collections of the State Natural History Museum; Issue 5).
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