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Showing results for tags 'late cretaceous'.
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I have some Lance formation matrix I purchased on that auction site and I have been slowly breaking it down. This is one of my finds. I don't have a scale small enough to measure it against so . . . It is a little smaller than the head of a pin, flea speck. I did a Google image search on Lance Formation micro teeth but came up with nothing. The photos were taken with my Nikon point an shoot through the eyepiece of my microscope. These photos are the best I can do.
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Any help on the identity and position of this small (scale bar = 1 mm) vertebra from the Hell Creek Formation (Late Cretaceous) of S. Dakota, would be greatly appreciated. It looks like much of the neural arch and processes are gone. The centrum is a bit more dorso-ventrally flattened as compared to the turtle vertebra I posted the other day, and the ventral side (?) of the centrum has sinuses unlike the turtle vert (perhaps due to wear / breakage?).
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Is this a tooth of Richardoestesia isosceles? Scale marks on left side of tooth are in mm and on the right side are in 0.5 mm increments. Serration count ranges from about 6 to 8 per mm. What remains of the tooth is approximately 11 mm in length. Hell Creek Formation (Late Cretaceous: Maastrichtian), South Dakota.
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Could someone help me with the identification and position of this vertebra. I was thinking it was procoelous and maybe crocodylomorph? Scale bar = 1mm.
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Hi All, I am hoping someone might recognize this bone fragment. It is from the Hell Creek Formation (Late-Cretaceous) of South Dakota. It looks fishy to me but does not have the exterior texture of gar skull. The exterior is really "pocked", almost like small, conchoidal chips. If fish, maybe bowfin, paddlefish, or sturgeon skull fragment? Only other thought I had was maybe crocodilian or champsosaur skull fragment, but I am leaning fish. There might be enough structure on the interior surface for someone to recognize which bone. Top photo is the exterior surface, middle is
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Sorry for the barrage of Hell Creek posts, I finally have time to go through some of my summer collections. I am having a hard time with this mammal tooth (Hell Creek Formation, Late-Cretaceous, South Dakota). The occlusal surface is heavily worn. I was thinking perhaps Cimolodon? or Mesodma? Any help / suggestions would be greatly appreciated. Scale bar = 1 mm
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Hi all, This is a leaf from the Hell Creek Formation (Late-Cretaceous: Maastrichtian) of South Dakota. My best guess is Marmarthia sp. (Lauraceae). Maybe M. trivialis? Can anyone familiar with the Hell Creek Flora confirm or perhaps suggest alternatives?
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Hey all, Had the honor of being taken fossil hunting with Pfooley recently. Found my first ammonites! I'd been wanting to find some for a long time. Was a great experience and I look forward to more trips soon. Checked out the famous "Windmill Site" first. The drive there was amazing in early morning. I busted open my first nodules... Poor quality picture of the Windmill Site finds. Nice variety in there. Far left is a large bivalve and there's a large gastropod on the far right. We moved on to find some other ammonites
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I found this near Cottonmouth creek, 8 miles south of Austin. Some material throughout the creek looks to be lithified beach sediment. The extinct volcano called " Pilot Knob" is said to have erupted roughly 80 million years ago. The rock is about 2.5" inches long.
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Found a small tooth in matrix I had collected from a trip I did a few years ago to Niobrara County in Wyoming, the Lance Formation. Went through my Hell Creek/Lance Books, Papers and Guide and had no luck with anything. Tooth looks like a croc, shape and base but it has a spoon crown with a center ridge that is very different than most teeth I've seen and throws me for a loop. Hopefully someone has seen something similar. Thank you for any assistance. Lance Formation and its 7 mm long
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I was going through some matrix, from my last dinosaur dig trip, using a microscope to look for anything small. In that process I found something real small a micro. Its slightly larger than 1 mm. One of the smallest fossils I've ever found. Cephalic hook, dermal denticle or something else? Hell Creek Formation, South Dakota Any input would be appreciated. Sorry its the best picture I can take with my digital scope. Two images with a little different contrast. Thank you for looking.
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Hi All, New to the forum. Like many others, I can't believe I didn't find this forum before. Anyway, Oct 1st I took a trip with some family and friends to Big Brook. It had rained (gully washer style) the night before, which turned over the river nicely in some places. In other places, there was a new 9 inch plus layer of fine sand/silt. After screening for 4+ hours, I came away with very few shark teeth (oddity for the location), but did find what I believe to be my first bit of mammal fossil. I believe it is a fragment of a North American Mastodon tooth. Basically just one
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Student uncovers Alabama fossils likely from oldest ancestor of modern sea turtles, October 5, 2016 https://www.uab.edu/news/innovation/item/7649-uab-grad-student-uncovers-alabama-fossils-likely-from-oldest-ancestor-of-modern-sea-turtles http://phys.org/news/2016-10-student-uncovers-alabama-fossils-oldest.html https://www.sciencedaily.com/releases/2016/10/161003182513.htm Gentry, A. D., 2016, New material of the Late Cretaceous marine turtle Zangerl, 1953 and a phylogenetic reassessment of the 'toxochelyid'-grade taxa, Journal of Systematic Palaeo
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My advice to any collector who is interested in dinosaurs is to become as much an expert as possible and do not rely solely on others for identification. One way to do so is to start a library of good reference books and pdf papers. This topic will focus on BOOKS There are a few must have books, if you're interested in TEETH and in my opinion this is the bible for North American ones. Dinosaur Systematics Approaches and Perspectives by Carpenter & Currie Addresses : 1)Chapter with detailed illustrations and ID guide of the teeth of Alberta's theropod's that are basical
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Steven and his dad have been aggressively collecting a site that has produced high quality fish for me for the last 15 years. Their hard work is starting to pay off. Here's an Apsopelix sp. that I just finished prepping for them Before...
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Hello, can you help me ID these bivalve? They are from the Lance Fm in eastern WY (Late Cretaceous). I'm sorry the pictures are not pristine. They are old and I do not currently have the shells with me to take new ones. Also, does anyone have any idea whether I can determine if they are aragonitic or calcitic at this point? Thanks!
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A new paper describing a new oviraptorosaur from Canada is now available online: Gregory F. Funston and Philip J. Currie (2016). "A new caenagnathid (Dinosauria: Oviraptorosauria) from the Horseshoe Canyon Formation of Alberta, Canada, and a reevaluation of the relationships of Caenagnathidae". Journal of Vertebrate Paleontology. Online edition: e1160910. doi:10.1080/02724634.2016.1160910. The fact that Apatoraptor was first thought to be an ornithomimosaur when first discovered but eventually re-identified as belonging to a caenagnathid upon further preparation of the specimen reminds me of
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Hi all, a while ago (8th February) i went to this spot in Germany close to Aachen with my dad. But i hadn't had the time to take some pictures yet. Unfortunately i didn't take my camera with me so i sadly no insitu pictures. The top find of the day was a nice Hoploscaphites pungens which i didn't expect to find over there as i usually only find shells, belemnites or some Echinoid parts. But when i got home i discovered an additional three (partial) ammonites in a rock we took for no real reason. Which i'm now really happy about
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Identifying Theropod Teeth from the Judith River/Two Med Formations
Troodon posted a topic in General Fossil Discussion
Identification of theropod teeth from the Judith River and Two Medicine formation is always a challenge even for the more experienced collector. Sellers whether its a dealer or auction site also struggle with identifications and sometimes just shotgun it. So I decided to put this together as an quick aide in providing you some information. Among the sources used is the reference book Dinosaur Systematics by Ken Carpenter and Phillip Currie... its an excellent reference source. This aide is for the more common teeth collected and sold, not for more obscure theropods. I'm sure mistakes/omissions- 3 replies
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New hadrosaurid from Deep South
DD1991 posted a topic in Partners in Paleontology - Member Contributions to Science
A new paper regarding a new hadrosaurid from the eastern US is available online: Albert Prieto-Marquez, Gregory M. Erickson and Jun A. Ebersole (2016). "A primitive hadrosaurid from southeastern North America and the origin and early evolution of ‘duck-billed’ dinosaurs". Journal of Vertebrate Paleontology. Online edition: e1054495. doi:10.1080/02724634.2015.1054495. It's no surprise that we have been deciphering the evolution of hadrosauroids and hadrosaurids in North America during the late Turonian to Santonian interval, but the discovery of Eotrachodon provides new insights into the earl- 20 replies
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My Jurassic Park - The Judith River Formation (Montana)
Troodon posted a topic in Member Collections
The Judith River Formation is a late Cretaceous geological formation that was primarily deposited in North Central Montana 80 to 75 million years ago about the same time as the Two Medicine Formation, See Map - Large meandering rivers flowing into the Intercontinental Cretaceous Seaway deposited the Formation. Much of the area was very flat, with swamps and bogs, much like today's southern Louisiana. Dinosaurs included Tyrannosaurs, the duck-bills hadrosaur Brachylophosaurus was the most common found, Ceratopsian included Avaceratops and smaller theropods like Tr- 75 replies
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Back in September I posted My Jurassic Park - Theropod Claws from the Kem Kem, the link is attached and now this topic is its continuation. There is more to the Kem Kem than just Theropod Claws (my passion) and I would like to share that with you. The Kem Kem beds consists of three formation: Ifezouane, Aoufous and Akrabou and most of the Dinosaur material comes from there but not all and I'll share a few examples of that. The Kem Kem beds are not a large area in Morocco and I've attached a map to give everyone a good understanding of that and where they are geographically. The bes
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The Two Medicine Formation is a late Cretaceous geological formation that was primarily deposited in North Central Montana 84 to 71 million years ago about the same time as the Judith River Formation, See Map - pink area. The Two Medicine is found along the east flank of the Rocky Mountains and represents the upland area of the Cretaceous Seaway while the Judith River Formation represents the lowland area. Although deposited in the roughly the same period the Two Medicine has yielded an amazing list of dinosaurs that are not found in the Judith River. These include Einiosaurus procurvicornis,
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There are two Tyrannosaurs described in the Hell Creek & Lance Formations, Tyrannosaurus rex and Nanotyrannus lancensis. Teeth from these animals are the number one sought after and coveted item by collectors. I don't understand all the hoopla and prices they command since my friends who I collect with know that I'm not a tooth person and prefer bones and claws. However I've been fortunate to find and acquire a few teeth and will post a several of my nicer ones. My two most favorite T-rex teeth are my biggest and smallest: The Baby (one of the rarest teeth around) is 1 1/8" and w
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So, I had this ammonite...I took it to a local rock shop to have thirds taken off of it. I went to pick it up and was blown away... ...AMAZING! (that's me, fistbumping myself for the thought of it. )...just wanted to share.
