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Showing results for tags 'echinoderm'.
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Unfortunatly this is is a piece found at the outcrop bottom, no opposite mould available. Important: this is a DECALCIFIED specimen, so you see the calcified part negative. Ordovician, scale bar 5mm. 2 pics of the same specimen. Any ideas? Echinoderm? Porifera? Bryozoan?...
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From the album: Misha's Silurian
Siphonocrinus sp.? Siluran Racine Fm. Wisconsin-
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- crinoid
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Ordovician decalcified specimen, the two moulds Scale bar: 5mm I would guess Fenestrida bryozoan, but might it be some sort of echinoderm "thing"?
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Found this echinoderm in Paleozoic rock. Crinoid calyx or something else?
SilurianSalamander posted a topic in Fossil ID
Found in some landscaping gravel I’ve found boatloads of crinoid stems at. Brachiopods and gastropods are not too uncommon in those rocks. Paleozoic, likely Ordovician-Silurian.
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From the album: C&D Canal Micro Fossils
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- cretaceous
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From the album: C&D Canal Micro Fossils
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From the album: C&D Canal Micro Fossils
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From the album: Kinzers Formation
echinoderm? Possibly Camptostroma roddyi Lancaster County, Pennsylvania-
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- cambrian
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Spent some time at road cut west of Canandaigua Lake. Found trilobite head first, others followed. Nice day for exploring. Regards Rick
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Going through what I found on Spring Break this year (my first ‘ fossil hunt’) on St. George Island, FL Is this an echinoderm? Are there other organisms or the structures seen just deeper exposed layers of the potential echinoderm? Thanks for looking
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- beach
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Tiny crinoid columnals. Coming back to the same beach with a sieve tonight.
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Only for who is familiar with decalcified material. Upper ordovician, Italy. Scale bar 5mm. Decalcified specimen are preserved as the internal and the external mould, so the calcified part occupied the space between the two moulds. On the left side: the two moulds of the first specimen On the right side: only one mould available of another specimen (I guess conspecific), worst preservation. Any idea of what could be?
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Found this Paleozoic echinoderm. I’ve found thousands of crinoid bits but nothing like this.
SilurianSalamander posted a topic in Fossil ID
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I have had this sand dollar in my collection for forever, I alway keep it with a modern one. I have no info on it and it was given to me from a friend. Any ID and possible location would be appreciated.
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Echinoderm identification help please! Polished cross-section in the Kimmswick Limestone (Late Ordovician: Katian; Missouri, USA) used as facing stone at Missouri Botanical Garden. Possibly the paracrinoid Implicaticystis (once known as Comarocystites)? Specimen is ~25 mm across.
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Hi everyone, My son found yesterday on a beach this rock and it looks like a fossil of something. Could you please have a look and let me know what you think? Is this a fossil? Many thanks Mariah
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Ever since the Cambrian Explosion, the continent of Laurentia (what is today Eastern North America and Greenland) had been colliding with Baltica (what is today Northern Europe and the Barents Sea). They clashed over millions of years, causing volcanic eruptions, earthquakes, and the usual, creating new large bodies of land. Still, at the same time, another miniature continent was forming, which would eventually become one with the two. This tiny landmass was called Avalonia, a long island that today makes up the middle to the upper eastern coastline of the U.S. and Maritime Canada. This body of land helped form a shallow sea between Laurentia and itself, providing a haven for many extinct organisms. This shallow sea was filled to the brim with life, everything from jawless fish to sea scorpions to trilobites, even orthocones. It would continue to exist until around the late Carboniferous and early Permian, when Laurentia, Baltica, and Avalonia were finally attached, causing the sea to become one with the newly-formed landmass of Pangea, creating the same swamps and lush forests unearthed in the Bay of Fundy. So, why do I bring up Avalonia and this long-lost ancient sea on the landmass' western coastline? Well, remember how I said all of Avalonia makes up the eastern U.S. and Canada? You see, Southwestern Avalonia made up what is today the states of New Hampshire and Vermont, which were both part of the shallow sea and the small continent, and small fragments of a formation from the Silurian exist today. This formation is called the Clough Formation, and it makes up most of the Northern Connecticut River Valley, with fossils dating back to both the Mid-Late Silurian and the Early-Mid Devonian. The problem, however, is that because New Hampshire and Vermont mainly consist of metamorphic and igneous rock left behind from the days of those volcanic eruptions I mentioned earlier, there are very few sedimentary formations or rocks in those states. However, that is not to say there aren't any fossils; no, no, no. The Clough Formation is a unique case in geology and paleontology, as the rocks and minerals in this formation are entirely metamorphosed sedimentary rock. Despite the rare chance of finding fossils in such a formation, the impossible was proven. Records dating back to around the late 1800s up to today tell tales of weird shapes and patterns in the semi-metamorphic slate, all of which point back to the organisms that once roamed that shallow sea millions of years ago, and guys, I believe I may have just found one, but I am still not sure. I drove out to southern Lebanon in New Hampshire, just a mile south of Whaleback Mountain, to walk the bike path alongside the highway. I knew that fossils had been reported there, so I brought my trusty geology hammer to break open some rocks. After about 30 minutes to an hour of searching, I came across an intriguing find. On the top-most part, I found a unique pattern that completely stood out from the rest of the rock. It appeared jagged and sharp, small bristles pointing out like tiny syringe needles. Just underneath it, small pill-shaped oddities held on to it, almost as if they depended on the strands to survive. I do not know if this is just a mineral deposit or a part of some metamorphic locality, but whatever it is, it looks interesting. I feel that I may have found one, but just for clarification, I have hopped on the forum to ask you all this question; do you guys think I may have just found a fossil? Let me know in the comments what you all think. Oh, also, if anybody can identify what kind of rock this thing came from? It would really be helpful, as I could use this as a helpful tip for finding fossils out here in the great wilderness of New England.
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I found this fossil at the Penn Dixie site in Western NY (near the creek running through the center) . I've been all over their website, but I can't find anything that looks like this. Sorry the photo isn't larger, my microscope camera isn't set up yet. I think it has 5 part radial symmetry. The lines on the stumpy 'arms' are raised ridges that are small at the tips and get longer as they go towards the center of the beastie. The fossil is .35 Inches from the tip of one stubby leg to the approximate center. I have seen others at this site, but not often. I would rate this type of fossil in the "uncommon" category. I was looking for scoledont jaws when I saw it. Still looking for a scoledont jaw, sadly. If anyone knows what this critter is, I would appreciate the info. I think it is some kind of echinoderm, but that's just because of the symmetry. Thanks for the help!
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From the album: Florida Invertebrates
Arbacia imprcera Pio-Pleistocene Sarasota County -
Unknown Ocala Limestone Echinoderms. Sacha, this one is for you!
minnbuckeye posted a topic in Fossil ID
Last week, I had the opportunity to explore a pile of gravel deposited along a road just north of Tampa, Florida. Echinoderms of many types were found weathered out. Some I have IDs on but others perplex me. The condition of many may make identification improbable. But who knows!! @Sacha, unfortunately, this road experience was not nearly as nice as my trip with you. But I feel my finds are of a similar nature. The first one is moderate in size, fairly round and is thick. Agassizia floridana????? The second I am sure is Eupatagus antillarum. The third I am confident is Durhamella ocalana. The 4th and 5th have stars. Neolaganum durhami is my guess. The stars are different between the two, the fifth one being raised significantly more than the fourth. So maybe 2 different species??? The sixth, seventh and eighth are totally unknowns. Number 8 has a definitive star and is quite small. Nine and 10 also are total unknowns. Both are very small.
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I know how Crinoid columnals looks like, but which are the features of other echinoderm classes (Rhombifera, Diploporita,...)? Image of a crinoid columnal mould (scale bar 5mm).
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I collected this specimen a while ago from the Liberty Formation (Upper Ordovician, Cincinnatian) of Indiana. Honestly, I have no idea what the heck it is. I posted this elsewhere and some thought it might be a strange echinoderm fragment, others thought it might not even be a fossil. Anyone seem anything similar before?
