Welcome back to #trilobitetuesday
Here is a large isolated tail section (pygidium) of the trilobite Pseudogygites latimarginatus. This comes from the Upper Ordovician Blue Mountain Formation in Craigleith, Ontario, Canada.
During the Eocene Epoch, 25 million years ago, parts of North America as far north as Oregon were covered with a sub-tropical forest that was nearly identical to the one found in Central America today. These large Brontotherium teeth only hint at the majestic size of a well preserved, adult skull.
During the Eocene Epoch, 25 million years ago, parts of North America as far north as Oregon were covered with a sub-tropical forest that was nearly identical to the one found in Central America today. These large Brontotherium teeth only hint at the majestic size of a well preserved, adult skull.
Welcome back to #FossilFriday
Here is a well preserved Macrocrinus mundulus crinoid from the Lower Mississippian (Lower Carboniferous) Edwardsville Formation from Crawfordsville, Indiana. The Edwardsville Formation. Crinoid fossils from this locality can be found in museums around the world.
www.youtube.com/watch?v=5Ymb...
Happy #FossilFriday meet Kaprosuchus saharicus! Nicknamed the “Boar croc” Kaprosuchus lived during the late Cretaceous of Niger 🇳🇪 roughly 95 million years ago. Kaprosuchus is a member of the Mahajangasuchidae an early branch of notosuchian crocodiles
Woah! Scientists thought they had the oldest octopus fossil, 300 million years old. Nope! New scans show it's a nautilus relative with 11 teeth per row instead of an octopus's 7 or 9. 🤯 Cephalopod history is being rewritten!
Out working on basal Cedar Mt. east of Utahraptor Ridge capped by Naturita Fm. east of Utahraptor Ridge. Upper middle cliff is Poison Strip Mbr. Red Beds at base in Morrison Fm. Got Lower Yellow Cat described from base of section..some surprises.. Chert lenses near base. @utahpaleo-ufop.bsky.social
There are many different estimates. The largest estimate I've seen was about 15-20 feet. Which in my opinion is plausible given the length and the circumference of large shells we have.
*same
Happy #FossilFriday! Meet Ptilodus, an extinct mammal from ~60 million yrs ago. They’ve been found across western North America, including the Science Museum of Minnesota’s Wannagan Creek site in #NorthDakota. They had blade teeth in their lower jaw and were roughly the size of a squirrel. 🐿️
Here is another from the some formation in back of my friend's car.
Welcome back to #FossilFriday!
What I'm holding in my hand is just a portion of the shell from from what would have been a large straight-shelled cephalopod known as a Endocerid. This comes from the Upper Ordovician Decorah Limestone in Jefferson Co, Missouri. They were the top predators!
Wall displays in a museum. One gives general information about Black in Natural History Museums and the leadership team highlighting black naturalists. The other talks about the contributions of Cameron Muskelly, a self-taught paleontologist and science communicator. He's a young black man in glasses and a button-up shirt holding a large trilobite fossil in the photo they used.
Surprise @cambriancam.bsky.social spotting at AMNH today. Nice!
This is an actual post. This is not funny. This is beyond desperate. This is a deeply unwell man who doesn’t belong anywhere near the levers of power. Every member of his cabinet and Congress is complicit in not demanding his removal now.
I got a sneak peak at this paper just over a year ago. Astounding material.
So much life in a tiny fragment of what was once the sea floor.
Cretaceous fossils, now found high in the mountains of Asfla.
#Fossils #Cretaceous #Paleontology #Travel
Diagram showing granite crust pulled left to right, creating a down-dropped graben in the middle that then is filled with feldspar-rich sand and dark mud, and then lots of basaltic lava (later metamorphosed to greenstone).
Fiddling around with a diagram (built in PPT) to illustrate mixed sedimentation + mafic volcanism in Neoproterozoic rift basins in Virginia. ⚒️
Pliosaur tooth found by a friend who took me into the mountains of Aslfa.
A marine repite.
Even at the top of a mountain, you can find remains of ancient marine life.
Estimated age: ~100–90 million years (Late Cretaceous).
#Fossils #Pliosaur #Paleontology
Welcome back to #FossilFriday
Here is Stromatolitic growth preserved in Chert. This comes from the Upper Cambrian-Lower Ordovician boundary within the Knox Group (Copper Ridge Dolomite) from Adairsville, Georgia. This will look amazing once I get this polished.
Today is Autism Acceptance Month! For those who don't know, I have Autism Spectrum Disorder (ASD). I was first diagnosed at the age of 8 or 9. Things were hard for me as a child. They are even harder for me as an adult on the spectrum. I have learned a lot about myself and my needs to cope.
Not really. It all depends on who you buy from and how to tell a real fossil from a fake one.
Welcome back to #TrilobiteTuesday
Here is Drotops megalomanicus. This comes from the Middle Devonian (Eifelian) limestones in Jebel Issoumour, Morocco. The white line is a vein of calcite running through the rock and the trilobite. If happened after the trilobite became a fossil.
A friend of mine also found this trilobite fossil. It’s over 400 million years old and still clearly preserved.
Lovely!
#trilobite #fossil #paleontology #geology
Not pyrite. Just mud that filled in the empty spaces.
I don't have my own polishing set. I used my rock club's polish wheel in their workshop. That is where I go to cut material as well. They have a lapidary saw room.
Rob is great. I've been watching is videos for a few years now.
Yep, Hexagonaria
I used my rock club's polish wheel in their workshop.
No, I used my rock club's polish wheel in their workshop.
