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Showing results for tags 'Paleogene'.
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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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A petrified mini-ecosystem: fern rhizome in nurse log
paleoflor posted a topic in Member Collections
L.S., Wanted to share this "mini ecosystem" in fossilized form. The photos below show a rhizome of Osmunda pluma Miller 1967, a member of the royal fern family, from the Paleogene of the Fort Union Group (probably the Sentinel Butte Fm.) near Glenn Ullin in Morton County, North Dakota. On the first photo you can see a central stele surrounded by "eyes", which are cross-sections through the petioles of the leaves of the fern (see for comparison this section made through an extant Osmunda cinnamomea rhizome). More to the top and bottom of the photo, parallel lines are visible. These are the remnants of a woody texture, probably of some kind of gymnosperm (see also the second image, a flatbed scan of the entire slab containing the fern rhizome). According to Miller (1967, p. 143) the fern was growing on a so-called "nurse log": when a tree in the woods falls over and starts to decay, this can provide an excellent opportunity for new plants to grow! See for example these lovely examples of modern nurse logs. Cheers, Tim Fern rhizome of Osmunda pluma Miller 1967 showing central stele and petioles The fern rhizome is embedded in a woody texture, interpreted as a nurse log.
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The first fossil mammal in my collection: a partial jaw of Merycoidodon sp.
gond posted a topic in Member Collections
Hello everyone, even though I haven't reached 35 fossils in my collection like I hoped for this year, I still managed to close 2023 with my 34th fossil! The one I'm going to show you today is, in fact, this 34th fossil, which is also the first mammal fossil I've ever owned Species: Merycoidodon sp. (Leidy, 1848) Size: ~3.0 cm long Age: 34-23 mya (Oligocene, stage indet.) Origin: South Dakota's Badlands (USA) About this fossil: a partial lower jaw of this genus, with four nicely preserved teeth. I personally like how, in this specimen, the matrix is still present, which helps to keep the two parts together and just makes the fossil look nicer
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Hello, I found this fossil shell in kaolin clay. I was wondering if somebody knew what species it was. The kaolin clay is supposed to be Cretaceous and Paleocene age. Thanks in advance.
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What you guys think about this tooth? For me- it's a Hexanchidae tooth fragment, but it also smillair to Pseudocoracidae. Nasiłów, Poland Greensand, Mastrichtian/Danian
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Fossil shark teeth from Ukraine - What formation?
bthemoose posted a topic in General Fossil Discussion
I acquired some Paleogene fossil shark teeth from a Ukrainian fossil hunter/collector and was wondering if anyone here might know what formations these may have come from. They were found on an island in the Dnieper River near/just south of Kyiv. The collector didn't know the specific formation and described them as coming from sand alluvium. From what I can tell, these appear to all be Eocene species, though not being familiar with the local geology, I can't rule out Paleocene for the Otodus obliquus tooth at least. Any ID corrections are of course welcome as well! Otodus obliquus Hexanchus agassizi Jaekelotodus trigonalis Otodus aksuaticus or O. auriculatus
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- dnieper river
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Largest Cretalamna appendiculata-type shark teeth
bthemoose posted a topic in General Fossil Discussion
I've been wondering how large teeth from Cretalamna appendiculata-type sharks could get. In their examination/further classification of these sharks, Siversson et al. depict several teeth that are a good deal larger than an inch/25.4 mm, including a first upper anterior of C. borealis that they note may have originally reached 38-40 mm in height (though with a broken tip is shorter than that now). From a marketplace perspective, C. appendiculata type teeth measuring an inch or larger appear somewhat uncommon, though they pop up from time to time. My question for shark teeth experts and collectors on the forum is what's the largest C. appendiculata-type tooth that you know of? Please post photos of any larger teeth in your collections as well. Below are a few large U.S. teeth that I've acquired. From left to right, they are: (1-3) 28.6 mm, 26.3 mm, and 28.0 mm from the Campanian of Russell County, Alabama; (4) 27.9 mm from the Santonian-Campanian of northeast Mississippi; and (5) 28.0 mm from the Maastrichtian of Conway, South Carolina. The tooth on the left would have been even bigger with the tip intact of course!
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Hello, I think I found my first serious fossil!! Up until now, I always found invertebrate and plant fossils like echinoids and giant oysters, but recently after fossil hunting last week at my favorite spot, the San Sebastián Limestone, I stumbled upon something absolutely incredible. I was rushing to get home cause it was getting dark and the river was getting pretty cold, but I tripped over this huge stone. I saw the shadow of something stuck and quickly put it in my backpack, swam and crossed the river and bought it home thinking it was some kind of fossilized wood. It is very, very heavy. However, after checking it closely, it looks like it's actually a bone! Those are extremely rare in the island and I've never seen one, so I'm hoping some bone experts can help me properly identify this fossil.
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I want to share this amazing experience. This was in San Sebastián, Puerto Rico. The Gozalandia waterfall is one of the most beautiful spots in the island, and because of this, it is a tourist attraction. I always fossil hunted near but I never went to this specific waterfall. I live close by so I went to take a simple dip but I absolutely could not hold back the urge to fossil hunt as soon as I got here. It is absolutely beautiful! After going down the wooden stairs, I immediately started checking out the rock beds. There's even a cave under the waterfall! After just 30 minutes of checking the stones, I found a beautifully preserved echinolampas. This formation is known to preserve fossils from the oligocene and paleogene period according to https://en.wikipedia.org/wiki/List_of_fossiliferous_stratigraphic_units_in_the_Caribbean#Puerto_Rico and San Sebastián has been my favorite spot to fossil hunt. I always find many beautifully preserved specimens.
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Here's an odd one. I think it's a Parotodus that might be the species, P. oligocaenus, which I have read is valid - something to talk to David Ward about. I bought this around the mid-90's as part of a small lot of teeth from the Suwannee River, Florida. I wasn't sure what it was at the time and Parotodus wasn't an in-demand genus like it is now. The dealer thought this and the other teeth washed out of the Ocala Limestone (Late Eocene). I lost track of this tooth and thought I might've traded it somewhere down the line but found it with another tooth from the same site in a zip-lock in a different box. It measures just over 1 1/8 inches. It looks like some Oligocene Parotodus I've seen. @fossilselachian @MarcoSr @isurus90064 @sixgill pete @Al Dente @sagacious @Northern Sharks
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Odd Carcharhiniform tooth from the Late Oligocene of South Carolina
siteseer posted a topic in Fossil ID
I was looking at some of my Oligocene teeth and took a little extra time with this one. I don't remember when I got it. I've bought from and traded with a few South Carolina dealers and collectors over the years. This one is from the Late Oligocene Chandler Bridge Formation. It measures about 11mm along the slant with fine serrations to the tip. I think it's an early Carcharhinus tooth but would like to hear from other collectors on this one. I was blanking on some names but I've got the call out to some of you. The Late Oligocene is a time before Carcharhinus became the wildly speciose genus we know today and already was by the end of the Miocene. None of the modern species were present in the Oligocene but there appears to have been a small variety of species by that time based on what I've seen from Germany, Pakistan, and South Carolina. This tooth reminds me of C. signatus so I wonder if it could be an early relative. @isurus90064 @MarcoSr @Al Dente @Untitled @sixgill pete @sagacious
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Hello! I found these shells in a Paleogene area near Khurais, Saudi Arabia and I was wondering if these species could confirm that they are truly Paleogene aged. I was also wondering why they look rusty colored. thank you for your time!
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I found this weird rock around limestone of Paleogene age near Khurais east of Riyadh Saudi Arabia. is it a agate? and how does it form. thank you all for your time!
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Hello! I found these fossils along with other shells and sorts in a Paleocene area near the city Khurais which is 200km east of Riyadh in Saudi Arabia. The area is known for shark teeth and fish bones. what could these barbed bones be?
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From the album: My collection in progress
Mastigusa sp. Menge 1854 Location: Sambian Peninsula, Kaliningrad Oblast Age: 56-34 Mya (Eocene, Paleogene) Measurements: 2,1x1,8 cm (amber), 5 mm (length of spider) Kingdom: Animalia Phylum: Arthropoda Subphylum: Chelicerata Class: Arachnida Order: Araneae Suborder: Opisthothelae Family: Hahniidae -
From the album: My collection in progress
Machilidae unidentified sp. Grassi 1888 Location: Rivne Oblast, Ukraine Age: 56-34 Mya (Eocene, Paleogene) Measurements: 2,8x2,5 cm (amber), 1,7 cm (length of bristletail) Kingdom: Animalia Phylum: Arthropoda Subphylum: Hexapoda Class: Insecta Subclass: Monocondylia Order: Archaeognatha Suborder: Machilida Family: Machilidae -
From the album: My collection in progress
Lithobiidae unidentified sp. Newport 1844 Location: Sambian Peninsula, Kaliningrad Oblast, Russia Age: 56-34 Mya (Eocene, Paleogene) Measurements: 1,9x1,1 cm (amber), 1,1 cm (length of centipede) Kingdom: Animalia Phylum: Arthropoda Subphylum: Myriapoda Class: Chilopoda Order: Lithobiomorpha Family: Lithobiidae -
From the album: My collection in progress
Striatolamia macrota Agassiz 1843 Location: Morocco Age: 56-48 Mya (Ypresian, Eocene, Paleogene) Measurements: 1,8x2,8 cm Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Chondrichthyes Subclass: Elasmobranchi Superorder: Selachimorpha Order: Lamniformes Family: Odontaspididae -
I'm finally getting around to posting pictures of this Moroccan shark tooth, which I believe is either a transitional Otodus obliquus or a transitional Palaeocarcharodon orientalis. My original thought was Otodus but @Al Dente flagged in the mailbox thread a few weeks ago that it might be Palaeocarcharodon instead. Any thoughts on this one? The tooth measures 49 mm on the slant and is 39 mm wide across the root.
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Balkanatolia: the forgotten microcontinent, the Grande Coupure, and European mammal evolution
Oxytropidoceras posted a topic in Fossil News
Balkanatolia: the forgotten continent that sheds light on the evolution of mammals, CNRS News, February 22, 2022 Balkanatolia: the forgotten continent that sheds light on evolution of mammals. UPI, February 22, 2022 Scientists Discover the Long-Lost Continent ‘Balkanatolia’ The landmass existed 40 million years ago and may have facilitated the migration of Asian mammals into Europe. Becky Ferreira, Vice, February 23, 2022 the paper is: Licht, A., Métais, G., Coster, P., Ibilioğlu, D., Ocakoğlu, F., Westerweel, J., Mueller, M., Campbell, C., Mattingly, S., Wood, M.C. and Beard, K.C., 2022. Balkanatolia: The insular mammalian biogeographic province that partly paved the way to the Grande Coupure. Earth-Science Reviews, no.103929. From abstract: “The Grande Coupure corresponds to a major episode of faunal turnover in western Europe around the Eocene- Oligocene boundary that is generally attributed to the influx of multiple clades of Asian mammals. Yours, Paul H.-
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***Need professional help with Paleogene/Eocene shark teeth identification***
Morte posted a topic in Fossil ID
Hello everyone!)) Need help of paleontologists and paleoichthyologists with identification of eocene shark teeth from Russia. I'm not professional, just a fan and rooky, so I choose possible species options for every tooth, according to books and scientific publications which I have. Hope I make right something at least. Be glad and thankful if somebody will help me figure it out)).
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On Tuesday, I made a trip back to the East Texas creek where I had found micro teeth last month. This creek is a Kincaid Formation outcrop. I had found the one and only productive area there just before I had to leave last time, so wanted to explore it better. Rain threatened the entire time I was there Tuesday, but it didn't really rain hard until I had gotten back home. Unlike my last time there, I found very little soft matrix on top of the limestone this time. At first, I wondered if it was just because our dry spell lately had hardened everything, but the more I explored, the more I came to realize that most of the softer matrix had just already been chiseled off. It's a reminder of how hard it is to find spots that aren't over hunted here in Texas. I didn't find many teeth at all this time, but brought home some suspicious matrix from where I did find a few teeth. I just finished going through that matrix, and sure enough, it did have a few more teeth in it. Here is what I got from the trip, including what I found in the matrix.
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Serious, experienced replies, please! This 0.5 cm long object is attached to a broken coprolite from the Eocene/Oligocene of NW Nebraska. Trying hard to figure it out. Wrong twexture for a tooth and it doesn't look like a seed, either. I have a guess, but right now a guess is all I have. Any coprolite specialists out there? I know the pictures could be better, but I don't have a microscope out here in the field.
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The Boltysh impact structure: An early Danian impact event
Oxytropidoceras posted a topic in Fossil News
The dinosaurs didn’t go out the way you think they did — study The paper is: Pickersgill, A.E., Mark, D.F., Lee, M.R., Kelley, S.P. and Jolley, D.W., 2021. The Boltysh impact structure: An early Danian impact event during recovery from the K-Pg mass extinction. Science Advances. Vol. 7, no. 25, eabe6530 DOI: 10.1126/sciadv.abe6530 Yours, Paul H. -
Adventures in the White River Badlands of Colorado
Opabinia Blues posted a topic in Fossil Hunting Trips
I just got back from an amazing and very fruitful week of fossil collecting on the White River Formation in northeastern Colorado. The White River Formation is a very easy and fun rock unit to collect vertebrate fossils on. The White River Formation was deposited during the very latest Eocene and the early Oligocene, though the faunal diversity in the areas I was collecting on suggest it was laid down during the Orellan North American Land Mammal Age, which centers on around 33 million years ago during the Rupelian age of the Oligocene Epoch. I am very lucky to have a grand uncle Gary (no biological relationship to me, is a close family friend who we’ve called “uncle” since I was a toddler) who is a cattle rancher up in northeastern Colorado, and he happens to have a pretty good amount of White River exposure on his property, in addition to some of the neighboring ranches of which Gary knows the owners and helped me to secure permission to collect on a few of them. He really is a great guy and is a real life true American cowboy. He has an interest in natural history and was eager to hear all about the fossils and geology of the area, though has never had the formal education or done the research to learn much about what’s out there. This is the second fossil collecting trip I’ve made to the ranch, though the first one where I’ve stayed for more than one night. The place truly is an amazing trove of fossil treasures and I can’t wait to tell you all about my week! In this thread I’ll make one post for each day (so as to not hit the picture limit too soon). Once I have the fossils prepped I’ll give updates here as well. Day 1, Sunday: My first day at the ranch began, ironically, at my own house. I had packed up the Jeep the night before with my field bag, two coolers filled with seven day’s worth of food, a suitcase full of clothes, and other such supplies for my fossil safari. I left my home early in the morning, took I-76 east to Fort Morgan, and then headed north to the ranch, in total about a 2.5 hour drive. The rest of the morning and early afternoon I spent visiting with and going over logistics with Gary and his wife and settling in at the ranch house I would be staying at, a property that used to be the home of another rancher before Gary acquired the property in 2002. They still maintain the house and it has both electricity and running water, so it makes a fantastic guest house and a place to stay when they’re doing work over on that side of their land. In the evening after I had made myself a quick dinner I decided I wanted to head down to a very productive exposure I had collected on last September for the evening. There was a partial oreodont skeleton that I had discovered eroding out of the hill the last time I was up there, and I wanted to see if there were any more bones there that had eroded out and I could collect. I picked up a few more bones from the feet and ankles that had been exposed in the last eight months and decided to take a scenic route back to my vehicle. A photo of the area of exposure I was in Sunday evening. This piece of badland will become very important throughout the rest of the week... On my walk back I walked over a ridge that I had apparently never been over, becase on a flat wash I noticed a pile of bone fragments. I approached the pile assuming that it would be yet another exploded tortoise shell that are so common in the area. As I got closer however, I was delightfully surprised to see the distinctive black color of fossil enamel, and a bit of digging revealed an eroded Subhyracodon jaw section, along with several loose teeth that I presume had come from the same section of jaw. This find, along with an oreodont jaw section I found later on while walking back to the Jeep that night, would be but a foreshadow of the big finds I would make later in the week. Two photos of the Subhyracodon jaw section as it was found in the field. The jaw section and some teeth after I had cleaned them up a little bit at home this afternoon.
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