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Showing results for tags 'crinoid stems'.
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Ordovician, Nicolet River Formation, Crinoid columnal segments
Denis Arcand posted a gallery image in Member Collections
From the album: Fossil Art
These crinoid segments look amazing in their natural color -
Ordovician, Nicolet River Formation, Crinoid columnal
Denis Arcand posted a gallery image in Member Collections
From the album: Fossil Art
© Denis Arcand
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Ordovician, Nicolet River Formation, Sowerbyella & Crinoid sterms
Denis Arcand posted a gallery image in Member Collections
From the album: Fossil Art
Ordovician, Nicolet River Formation, Sowerbyella & Crinoid sterms-
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This rock was part of erosion control on banks of creek in Cretaceous Eagle Ford so it is not from here and that's all I know. It's a mass of crinoid stems with a couple things I can't identify, first object is similar to the stems but it's translucent and doesn't appear segmented, next object is also translucent with stripes. Last pic maybe bryzoan?
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Carboniferous and Permian boulders in Lithuania- discovery needs confirmation!
D.N.FossilmanLithuania posted a topic in General Fossil Discussion
Dear Guys, During the last several years i detected unknown truth talking about Lithuanian boulders- the Carboniferous and Permian marine rocks are very numerous and their age is various- there can be found almost each stage of Carboniferous and Permian. The main rock types are three- dolomite and limestone with masses of brachiopods that is various in color, stromatolite limestone with mollusks and unidentified cephalon like fossils, and the last- lacustrine limestone with coelacanth scales and possible plant remains (Carboniferous rhabdodermatids are very numerous). Carboniferous period and Early- Middle Permian was not known in Lithuanian glacial boulders so I very need the strong expert, especially who works on Carboniferous- Permian brachiopods. If my age determinations are correct then I will write the scientific book about this discovery and i think there is huge possibility that many of these boulders could be transported by someone glaciation from Northwestern Russia (or Northern Ural) because there are big areas of Devonian, Carboniferous, Permian and Triassic rocks near surface and Northern mountains potentially could be the cold center at some glaciation period in the Pleistocene. I will show all the pictures with fossil identifications and size, maybe someone will tell the opinion about the taxon and age possibilities. Any contact detail or other important information is very welcome! First image- Angiospirifer (Late Carboniferous), 1.1 cm length Second image- Anthracospirifer (Middle- Late Carboniferous), 1.8 cm length third image- Archaeocidaridae sea urchin plates (Carboniferous), 5- 8 mm diameter Fourth image- unidentified brachiopod species from Carboniferous- Early Permian (8 mm- 1 cm length) Fifth image- Atomodesma? bivalves from Kungurian boulder with Waagenoconcha brachiopod (1.7- 2.3 cm length)- 16 replies
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- bryozoans
- carboniferous and complete permian!
- coelacanths
- crinoid stems
- dolomite/limestone boulders
- gastropods
- lake origin limestones
- lungfish
- numerous brachiopods
- orthida
- orthotetida
- other fossils
- paleoniscids
- possible boulder origin- western russia
- productida
- rhynchonellida
- sharks
- spiriferida
- stromatolite limestones
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Crinoid Stems - Thin, showing cirri attachments.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Thin Crinoid Stems showing attachment nodes for cirri SITE LOCATION: Fort Payne Chert Formation, Alabama TIME PERIOD: Mississippian Period ca 350,000,000 yrs old Data: A crinoid stem. Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). The name comes from the Greek word krinon, "a lily", and eidos, "form". They live in both shallow water and in depths as great as 9,000 meters (30,000 ft). Those crinoids which in their adult form are attached to the sea bottom by a stalk are commonly called sea lilies. The unstalked forms are called feather stars or comatulids. Crinoids are characterised by a mouth on the top surface that is surrounded by feeding arms. They have a U-shaped gut, and their anus is located next to the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, most crinoids have many more than five arms. Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only about 600 extant crinoid species, but they were much more abundant and diverse in the past. Some thick limestone beds dating to the mid- to late-Paleozoic are almost entirely made up of disarticulated crinoid fragments. Kingdom: Animalia Phylum: Echinodermata Class: Cridoidea-
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From the album: MY FOSSIL Collection - Dpaul7
Crinoid Stems (Two views) Fort Payne Formation, Alabama Mississippian Period ca 325,000,000 yrs old A group of crinoid stems. Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). The name comes from the Greek word krinon, "a lily", and eidos, "form". They live in both shallow water and in depths as great as 9,000 meters (30,000 ft). Those crinoids which in their adult form are attached to the sea bottom by a stalk are commonly called sea lilies. The unstalked forms are called feather stars or comatulids. Crinoids are characterised by a mouth on the top surface that is surrounded by feeding arms. They have a U-shaped gut, and their anus is located next to the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, most crinoids have many more than five arms. Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only about 600 extant crinoid species, but they were much more abundant and diverse in the past. Some thick limestone beds dating to the mid- to late-Paleozoic are almost entirely made up of disarticulated crinoid fragments. Kingdom: Animalia Phylum: Echinodermata Class: Cridoidea -
From the album: MY FOSSIL Collection - Dpaul7
Crinoid Stems (Two views) Fort Payne Formation, Alabama Mississippian Period ca 325,000,000 yrs old A group of crinoid stems. Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). The name comes from the Greek word krinon, "a lily", and eidos, "form". They live in both shallow water and in depths as great as 9,000 meters (30,000 ft). Those crinoids which in their adult form are attached to the sea bottom by a stalk are commonly called sea lilies. The unstalked forms are called feather stars or comatulids. Crinoids are characterised by a mouth on the top surface that is surrounded by feeding arms. They have a U-shaped gut, and their anus is located next to the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, most crinoids have many more than five arms. Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only about 600 extant crinoid species, but they were much more abundant and diverse in the past. Some thick limestone beds dating to the mid- to late-Paleozoic are almost entirely made up of disarticulated crinoid fragments. Kingdom: Animalia Phylum: Echinodermata Class: Cridoidea -
I received several small Rugose Coral from member Herb to make microscope thin sections.. This is the first completed slide. There should be at least six or seven more slides in the collection. This slide is from the Pennsylvanian formation in Mineral Wells TX, USA Geologic age: Phanerozoic | Paleozoic There were six fossils in this group. The largest is the subject of this post. This is a slice of the specimen through the centre. This shows the cell structure of the Rugose Coral and the minerals that replaced the soft part of the Coral. A web version of this post may be found here.
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From the album: Mine
Crinoidea, limestone, found in Arizona- 2 comments
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Because I now have a semi-reliable and decent microfossil photographing system, I will post on the micros I have that I collected a while ago. These are from the Pennsylvanian, and were collected in Brownwood, Texas. Though it doesn't show up in the pictures the fossils are a pinkish-brown color. Most of the material was made up of three different fossils: fusulinids, bryozoan colonies, and crinoid stems. There were a few broken brachiopod shells in it as well. Here are the fusulinids: Here are the bryozoans: And last are the crinoids: The material was so fossiliferous that in a small bag, I have already found at least two tablespoons of each of these three micros. I haven't even finished going through the bag yet. Oh, and another interesting non-fossil find was a few prickly pear cactus seeds! I don't know why they were in there, but I thought that that was kind of funny.
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