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Showing results for tags 'arizona'.
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I have found some Pennsylvanian silicified “wood” from the lower part of the (~207 mya) Naco Formation in Arizona. This is the first recorded instance of likely plant material from the Naco. The formation is all marine in the section that I found it in and has lots of crinoids and brachiopods. One piece has some slight plant like internal texture with isolated circles and curved hash. Photo of side view of 90 mm wide piece with calcite rhomb molds. Most of the wood from that time had distinctive exteriors such as Calamities, Lepidodendron and Sigillaria. Any idea of what my pieces of wood might be? Could they be internal pieces of above mentioned varieties without the distinctive texture? Could it be a tree fern such as Psaronius? @paleoflor Attached picture of single piece on a blue zippered notebook is about 185 mm long.
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Look guys I have a... well its definitely a something? Is it a plant, the top of a crinoid, a broken tooth, a really tiny volcano??? No idea. And as a bonus I have no idea where it came from either. It was given to me ages when I was a kid. So if you've got any ideas on what the heck it might be, I'd love to hear 'em! Thanks!
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I found this fossil as a child on my grandfather's ranch near Snowflake, AZ. Would love to have some help IDing it. Thank you!
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Hey everyone. I thought I'd share some of the things I found on my last fossil hunt. So.. Many.. Fossils! One might even say that there were a plethora of fossils. If I could, I would've taken them all with me, but sadly my backpack can only carry so many rocks. I was literally examining each rock I had, trying to decide which to carry back and which to leave behind and how many I could fit in my pants pockets before they started to fall down. Eventually I decided to just stop looking for fossils and hike back to the jeep. This lasted all of 3 seconds before I found another a beautiful byrozoan and was trying to figure out how to fit it in my pack. The byrozoan and the sponge below are my favorites since i don't see many of them and the brachipod in the matrix just looks cool. lol Its fascinating to look at these fossils and think about how Arizona used to be completely underwater long, long ago.
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Hey guys, I'm back with another ID question. The fossil I'm trying to identify is in the 1st picture. I think that what I have is a fossilized brachiopod WITHOUT the shell. What do you guys think? It's the same general shape, but the color and textures of this fossil look different than others I've found in the area. The symmetrical textured part in between the two humps, I've never seen before. Pictures 1,2, and 5 show the fossil in question and pictures 3 and 4 show examples of other brachiopods that I've found. The last picture is an example of a brachiopod that was broken in half, exposing the animal inside. (when I uploaded the post the pictures got out of order) So anyways, that's what I think I have but I'd really appreciate your thoughts on this. Ya'll have a lot more experience with these thing than I do so I welcome your opinions. Thanks!
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These mollusk fossils are of a friend o mine, who got it from a stonework supplier. He says that it comes from Arizona, and that is all that he knows about it. Can you help me to identify the species, and the aproximate age? Tank you
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Found a nice set of front and rear, left and right chirotherium prints. Couple pictures of what the site looks like - I move one and hit two more. Currently have over 100 rocks with footprints.
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Amniote tetrapods documented in two Pennsylvanian Grand Canyon trackways
Oxytropidoceras posted a topic in Fossil News
Discovered fossil tracks determined to be oldest known in Grand Canyon National Park ABC, Channel 15 News, Arizona The open access paper is: Rowland, S.M., Caputo, M.V., and Jensen, Z.A., 2020. Early adaptation to eolian sand dunes by basal amniotes is documented in two Pennsylvanian Grand Canyon trackways. PLoS ONE 15(8): e0237636. A related paper is: Francischini, H., Lucas, S.G., Voigt, S., Marchetti, L., Santucci, V.L., Knight, C.L., Wood, J.R., Dentzien-Dias, P. and Schultz, C.L., 2020. On the ;presence of Ichniotherium in the Coconino Sandstone (Cisuralian) of the Grand Canyon and remarks on the occupation of deserts by non-amniote tetrapods. PalZ, 94(1), pp.207-225. Yours, Paul H. -
Distinctive scalloped growth lines and angular plications identify this scallop as an Acanthopecten. This is the best specimen of its genera for the Naco where molluscs are common but usually poorly preserved. Found in 200 mm wide slab with Composita subtilita, Myalina (Myalina) nacoensis, Anthracospirifer occiduus, Derbyia crassa, Aviculopecten, minute coiled gastropods, crinoid columnals, several bryozoans species and scaphopods.
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I'm in Northern Arizona in an area full of crinoid, bryozoan, and brachiopod fossils. Recently I found what I believe might be a cyclocrinite. It's round, about the size of my thumb, and pitted like a golf ball. Its been suggested that this might be a calyx from a crinoid but since the hexagons on my fossil extend inward and not outward, I have my doubts. It looks like this thing was trapped in a pocket when it was fossilized. You can even see some space between the fossil and the material around it. The last picture shows the section of the stack that broke off, revealing the fossil inside. I thought about cracking it open but I'm concerned about damaging the fossil. Any thoughts on what this might be? If its not a cyclocrinite my other theory is that some poor caveman lost his golf ball in a water hazard on a 500 million years ago. I'm new to the forum and you guys are the experts here so any help would be appreciated!
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This specimen was found near the town of Mammoth, Arizona.
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The footprint in the lower right is chirotherium. The straight line looks to be a tail drag. The squiggly lines are mud cracks I assume.
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The first picture is a Rotodactylus that has all five toes. The little one at the bottom center is sort of oval shaped and sticks out an angle. Second picture I have no idea. The print on the far right center looks like it has stubby little toes.
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Found this rock with some nicely defined footprints. The first two pictures are of the same print - has a great impression of the ball of the foot.
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This rock has a nice variety of prints with varying number of toes. The bottom center has two toes, the left has three. The upper right is a very distinct print but I can’t tell if there is is a fourth toe to the right of the three long ones.
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Here are some of the various sizes of the chirotherium footprints.
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Here are some closeups with scale (inches). It looks to me like there are some two toe and some three toe prints u
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The first picture looks like a different print than what I’ve found before - the toes are much wider spread than the chirotherium and there seems to be only three toes, not four. The second picture shows an interesting pattern in the rock. The third has front and rear prints.
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Spent most of the day dragging out garbage rocks but found this one. Can’t tell if it’s a smeared Chirotherium or some thing else. All you Lady Gaga Little Monsters, paws up!
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The rock I recovered today has a new type of footprint I haven’t seen before (first picture) as well as a couple of nice chirotherium.
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Pulled this 7.5 foot slab out today. A lot of the prints are faint but some nice clear ones.
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Michelinia is a less common, but widely distributed coral in the Pennsylvanian Naco Formation in north central Arizona. The coral lacks noticeable septa and has tabulae that are often convex upward. Dozens of silicified colonies ranging from less than 1 cm to 25 cm across were found in a several meter square area with several species of brachiopods, horn corals and crinoid stems. Mindat: https://www.mindat.org/taxon-3250564.html
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Over 30 big slabs recovered now. Found a nice one with three Chirotherium strides - front and rear feet.
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Found this nautiloid. Preservation not so great (but you can see septa) but the colors are awesome!
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A ‘Jurassic Park’ icon was so much different in real life
Oxytropidoceras posted a topic in Fossil News
A ‘Jurassic Park’ icon was so much different in real life, BRG_Com https://bgr.com/2020/07/08/dilophosaurus-jurassic-park-study/ Famous Jurassic Park Dinosaur Was More Powerful than Previously Thought, Sci News, July 9, 2020 http://www.sci-news.com/paleontology/dilophosaurus-wetherilli-08620.html The paper is: Marsh, A., & Rowe, T. (2020). A comprehensive anatomical and phylogenetic evaluation of Dilophosaurus wetherilli (Dinosauria, Theropoda) with descriptions of new specimens from the Kayenta Formation of northern Arizona. Journal of Paleontology, 94(S78), 1-103. doi:10.1017/jpa.2020.14 https://www.cambridge.org/core/journals/journal-of-paleontology/article/comprehensive-anatomical-and-phylogenetic-evaluation-of-dilophosaurus-wetherilli-dinosauria-theropoda-with-descriptions-of-new-specimens-from-the-kayenta-formation-of-northern-arizona/39C2921EDC6E951AC9F94A22158CA4E5 Yours, Paul H.- 1 reply
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