Fossil Friday #338: Braceville Surprise! #fossils #paleontology #MazonCreek #FossilFriday #stigmaria #lepidodendron #pennsylvanian #carboniferous

Jeff Allen recently sent us photos of a fossil he found at Braceville. The specimen…

https://esconi.org/2026/10/fossil-friday-338-braceville-surprise/

Mazon Monday #343: 1990 Mazon Creek Open House #fossils #paleontology #MazonCreek #MazonMonday #pennsylvanian #carboniferous #history

The Mazon Creek Open House was first held in early 1984. It was an extension of the Mazon…

https://esconi.org/2026/10/mazon-monday-343-1990-mazon-creek-open-house/

Fossil Friday #337: A Different View of Lepidostrobus #fossils #paleontology #FossilFriday #MazonCreek #pennsylvanian #carboniferous #lepidodendron

Lepidostrobus is a cone from lepidodendron tree.  It was named in…

https://esconi.org/2026/10/fossil-friday-337-a-different-view-of-lepidostrobus/

Throwback Thursday #337: Looking Back At ESCONI for October 2026 #fossils #history #paleontology #MazonCreek #TBT #ThrowbackThursday

ESCONI highlights from 25, 50, and 70 years ago...

https://esconi.org/2026/10/throwback-thursday-337-looking-back-at-esconi-for-october-2026/

Reminder: Mazon Creek Fossil Day 2026 – Saturday, October 10th, 2026 – Coal City Library #fossils #paleontology #MazonCreek #MazonCreekFossilDay #ESCONI #pennsylvanian #carboniferous

The…

https://esconi.org/2026/09/reminder-mazon-creek-fossil-day-2026-saturday-october-10th-2026-coal-city-library/

Mazon Monday #342: Jeanerpeton mazonensis – A new Mazon Creek tetrapod! #fossils #paleontology #MazonCreek #MazonMonday #verebrate #pit11 #Carboniferous #Pennsylvanian #FieldMuseum

The Mazon Creek fossil biota has a new member...…

https://esconi.org/2026/09/mazon-monday-342-jeanerpeton-mazonensis/

Fossil Friday #336: Shark Egg Case from Chowder Flats #fossils #paleontology #MazonCreek #FossilFriday #carboniferous #pennsylvanian #morris #shark #sharkeggcase

Here's a beautiful Palaeoxyris prendeli from Chowder…

https://esconi.org/2026/09/fossil-friday-336-shark-egg-case-from-chowder-flats/

¿Cómo identificaron Jeanerpeton mazonensis, la nueva especie fósil? #Jeanerpeton #JeanerpetonMazonensis #Paleontologia #Ciencia #Fosiles #NuevaEspecie #Carbonifero #MazonCreek #FieldMuseum #Anfibios #DescubrimientoCientifico #HistoriaNatural #felizviernes #25deseptiembre

Mazon Monday #341: Titanoscorpio douglassi #fossils #paleontology #MazonCreek #MazonMonday #pennsylvanian #carboniferous #scorpions

Titanoscorpio douglassi is known from just three specimens, but the holotype is a breathtaking…

https://esconi.org/2026/09/mazon-monday-341-titanoscorpio-douglassi/

Fossil Friday #335: A Couple of Beautiful Rhacophyllum #fossils #paleontology #FossilFriday #MazonCreek #paleobotany #carboniferous #pennsylvanian

Long-time member Marty Houdek recently sent me a couple photos of Rhacophyllum from Mazon Creek. The…

https://esconi.org/2026/09/fossil-friday-335/

Mazon Creek #340: Neuropteris thompsoniana #fossils #paleontology #MazonMonday #MazonCreek #seedfern #pennsylvanian #carboniferous

This is Mazon Monday post #340.  What’s your favorite Mazon Creek fossil?  Tell us…

https://esconi.org/2026/09/mazon-creek-340-neuropteris-thompsoniana/

Fossil Friday #334: Mariopteris from Pit 4 #fossils #paleontology #MazonCreek #FossilFriday #pennsylvanian #carboniferous #seedfern

I was talking to Ralph Jewell and Jeremy Zimmerman at the Braceville field trip a few weeks ago…

https://esconi.org/2026/09/fossil-friday-334-mariopteris-from-pit-4/

Mazon Monday #339: Braceville Fall 2026 Field Trip Report #fossils #paleontology #MazonCreek #MazonMonday #fieldtrip #Braceville #WormHill #pennsylvanian #carboniferous

At the end of August, ESCONI held our annual…

https://esconi.org/2026/09/mazon-monday-339-braceville-fall-2026-field-trip-report/