#TrilobiteTuesday Here is Dalmanities limulurus from the Lower Silurian Rochester Shale from Middleport, New York State. The Rochester Shale is one of the most famous silurian fossil sites in the US. Fossils were first recognized when the Erie Canal was first being built in 1817-1825.

Virginia Zurriaguz and Mauricio A. Cerroni (2025) Postcranial pneumaticity in abelisaurids (Dinosauria: Theropoda): the cases of Tralkasaurus cuyi, Skorpiovenator bustingorryi and Carnotaurus sastrei Ameghiniana (advance online publication) www.ameghiniana.org.ar/index.php/am...

Not drifts of snow, but drifts of feldspar crystals in the steps of Liverpool Street Station on Bishopsgate. Cornish Carnsew Granite #urbangeology

Came across a British Hong Kong coin from 1978!

Lot's of brachiopods in this 470 million years piece of limestone from Catoosa, County, Georgia. It represents ancient sea life that was thriving during the Ordovician period.

Welcome back to another #FossilFriday! Here is a internal cast of the ammonite Mortinoceras equidistans. This comes from the Lower Cretaceous (Albian) Fort Worth Formation in Texas. During this time, Texas was covered by the Western Interior Seaway. Ammonites like these are common in the area.

Welcome back to #TrilobiteTuesday Here is a pygidium (tail section) from a large Dalmanitid trilobite. This specimen comes from the Lower Devonian Birdsong Shale in eastern Tennessee.

#fossilfriday a shell of a giant inoceramid clam. How much chowder you think you could make with that? On display at the Sternberg Museum of Natural History, Hays, Kansas. #sternbergmuseumofnaturalhistory #sternbergmuseum #hays #Kansas #prehistorickansas #clam #giantclam #fossil #paleontology

Forgotten women of paleontology: Estella Bergere Leopold. paleonerdish.wordpress.com/2025/11/21/f...

⚒ #FossilFriday 🦑 🐚 Faxe quarry's Danian reef 📷 Fossil cold-water coral mound ecosystem: e.g. scleractinian corals, over 120 species of small gastropods, echinoderms, bryozoans ⏳ Danian (66-61.6my) 🔎 Paleodepth 100-300m /328-984ft 📍 Faxe, Denmark 🇩🇰 #geology #geoscience #paleontology #fossil

⚒ #FossilFriday 🦑 📷 Nummulites Type of fossil foraminifera, lived in the warm shallow seas of the Tertiary (~52my). 📍 Rock face of Piz d'Artgas (Elev.: 2600m/8530ft) , Grisons, Switzerland 🇨🇭 #geology #paleontology #fossil

#MolluscMonday is all about rudists! These unusual bivalve molluscs were very common in the Late #Cretaceous, especially in tropical settings around the Tethys Ocean. Individual or conjoined specimens occasionally appear in the UK Chalk but are often poorly dated.

Life is just one big sensory ick and I think that's horrible 🖤

On the 1st day of fossils, my true love gave to me... A Clarkeocrinus troosti. I only have 1 in my collection. Despite my online handle, it is not named after me. This Devonian crinoid was named after the first New York State Museum Director, John M. Clarke. #12DaysofFossils

Had a fantastic time at the Gwinnett County Gem and Mineral Show! It was my first time going to this particular show. Lots of great vendors and awesome specimens. I got to spoil myself a little bit. 😊

Freshwater mosasaurs for #FossilFriday! New study by @melanieduring.com & colleagues find Late Cretaceous mosasaur teeth in Hell Creek Formation (ND) with geochemical signatures of living in freshwater rivers. Paleoartists, fire up your art tools & have fun creating mosasaur vs. T. rex battles! 🧪🦖

#FossilFriday! Here is the clam Cyrenopsis sp. that has been replaced by semi-precious Opal. This comes from the Lower Cretaceous Bulldog Shale Formation in Coober Pedy, in South Australia. Many opalized fossils like belemnites, dinosaurs, and even a plesiosaur nicknamed "Charlie" were found.

Trilobite: "Get it off get it off GET IT OFF!!"

Welcome back to another #TrilobiteTuesday Here is the positive and negative impression of Amecephalus idahoense. This specimen comes from the Middle Cambrian Spence Shale Member of the Langston Formation in Idaho. The spence shale is a unique group of rocks that preserves soft bodied organisms.

#MolluskMonday, #Crustmas edition: scallop encrusted with acorn barnacles! Bonus cheilostome bryozoans, but don't miss the abraded barnacle base plates either. 🧪⚒️🦪

#MineralMonday As a native Georgian, I am pretty proud of the fact that we have some beautiful gem quality Amethyst Quartz. Some can be deep jelly purple in color while others can be a more lavender purple. I've had to opportunity to visit one of the mines but didn't find anything close to these!

Here is a bit of a seak peek of one of drawers dedicated to trilobites. 😘

#FossilFriday comes with an extra dose of #Crustmas tonight! ⚒️🧪 Ostracodes don't get a whole lot of attention among the general public, and so not a lot of love. But these bivalved crustaceans have quite the fossil record and thrive yet today, much as they try to pretend to be mollusks.

More folded + cleaved Coombs Limestone in Rockport, Maine, USA for #FridayFold fun. ⚒️

Brachiopods may look like clams, but have a different axis of symmetry and very different internal structures called lophophores. There are still brachiopods alive today, but they are rare. This Paraspirifer bownockeri is from the Devonian Silica Shale of Sylvania, Ohio. #FossilFriday

Welcome back to #FossilFriday! Here is a Petoskey Stone which is Michigan's state stone. It is a colonial rugose coral known as Hexagonaria percarinata. This comes from the Middle Devonian (Givitian) Gravel Point Formation (Traverse Group). Each corallite that you see would have housed a polyp.

Checkout this article I found at PLOS: dx.plos.org/10.1371/jour...

Synopsis of the Triassic reptiles from Germany fr.pensoft.net/articles.php...

A diminutive tyrannosaur lived alongside Tyrannosaurus rex | Science www.science.org/doi/10.1126/...

This paper is finally edited! Hooray! 🦖🌎 www.nature.com/articles/s41...

In my #ENVSCOMM25-2 class today, a review of social media & its uses in environmental-science communication. Example to show the class? A 2025 blogpost @neorsd.org by on stormwater-management principles related to Tom Holland's lip-synch battle performance. neorsd.medium.com/what-tom-hol... 🧪💧🚽

Welcome back to #TrilobiteTuesday Here is the positive and negative impressions of Bathyuriscus fimbriatus. This specimen comes from the Middle Cambrian (Drumian) Marjum Formation in House Range, Utah. The Marjum is age equivalent to the Wheeler Shale but with slightly better preservation.

#MineralMonday Here is a beautiful cluster of Iron Pyrite crystals from the Magmont Mine in Missouri (USA)

So, yeah - this is basically fossilized #DinoPuke ... giving us a new species of #pterosaur. 🤷‍♂️ 🦕🤮 www.science.org/content/arti... by @jack-tamisiea.bsky.social via @science.org

Still probably one of best specimens of Isotelus maximus.

This fossil is an example of what is called a "mortality plate" as it contains the remains of several animals that all died around the same time. Trilobites were some of the first animals to evolve an exoskeleton, and as a result fossilize very well compared to other Cambrian creatures.

I've recently been re-reading a lot of Dave Raup's work. Not sure I endorse the idea of academic heroes but based on his constributions to science he was unambiguously God's gift to paleontology

#FossilFriday Fossilized Ammonite (Bacculites compressus) from the former Western Interior Seaway, which helped form the Pierre Shale formation.

Holding down your meal with a clawed foot, steadying for deft jaws. It’s hard not to be a little envious.

Welcome back to #FossilFriday Here is a piece of limestone with beautiful Rafinesquina trentonensis brachiopods I collected from the Upper Ordovician (Katian) in Jefferson County, Missouri. These rocks are age equivalent to the upper portion of the Cincinnatian Series. Anyone like seafood?

Liu, Y., Zeng, H., Zhao, F. et al. A tiny Cambrian stem-mandibulate reveals independent evolution of limb tagmatization and specialization in early euarthropods. Sci Rep 15, 19115 (2025). doi.org/10.1038/s415...

#TrilobiteTuesday Here is part of the body of quite a large trilobite known as Paradoxides spinosus. This specimen comes from the Middle Cambrian (Drumian) Jince Formation from the Czech Republic. Paradoxides is one of the largest trilobites known from the Cambrian period.

Two miles of ice core on the shelf at our national ice core facility in Lakewood, Colorado. The WAIS Divide core from West Antarctica is a 3400m long (deepest US core, 2nd deepest ice core ever) 68,000 year old record of high resolution climate.

Happy Origin Day! Published OTD in 1859

Welcome back to #fossilfriday Here is the crinoid Arthroacantha carpenteri with a Platycerid snail attached. These snails are Coprophagous which means they ate fecal matter. The snail would attached to the anal chimney of the crinoid and would feed on the waste. Arkona Shale Mid Devonian Ontario

Spent some time in my prep room for some fossil therapy. This is an Isotelus roller I found at Flat Run quarry near Mt. Orab, Ohio. I exposed most of the body and the genal (cheek) spine. I can feel my back loosen up and stress melt away.

"Quiet, piggy!"

You know, I'm not good about #TrilobiteTuesday. They weren't a strength of the collection, unless you count a stupid number of Silica shale phacopids that probably aren't Phacops rana as labeled, but ... I am not a trilobite guy. These are a couple of olenellids, famous as tectonic shear indicators