This is Throwback Thursday #287. In these, we look back into the past at ESCONI specifically and Earth Science in general. If you have any contributions, (science, pictures, stories, etc …), please send them to [email protected]. Thanks!  email:[email protected]. Unfortunately, we don't have a year for this story. If anyone remembers when the display first appeared, please send it to…

Every year the National Park Service picks a park for National Fossil Day. For 2025, it's the John Day Fossil Beds National Monument (JODA). There are many ways to celebrate the day... see this link. Today, the badlands, sagebrush steppe, and riparian habitats of the John Day River Basin of eastern and central Oregon support diverse systems of plants and animals.

Dire wolf skull The October 2025 Paleontology Study Group Meeting will be held on October 18th, 2025 at 7:30 via Zoom. The topic is “Creating 3D Digital Models for Paleontology”. It will be presented by Shellie Luallin. Shellie Luallin will be presenting “Creating 3D Digital Models for Paleontology”. 3D models increasingly appear in the digital realm - in TV shows, movies, commercials, and in science. 

This is Mazon Monday post #291.  What’s your favorite Mazon Creek fossil?  Tell us at email:[email protected]. Figure 89.1, Dithyrocaris sp.; left: dorsal view; right: ventral view; modified after Shabica and Hay (1997).Scale bars = 5 mm. - from "The Mazon Creek Fossil Fauna" by Jack Wittry Dithyrocaris sp. is a genus of crustacean from the Carboniferous. The Mazon Creek fossil biota includes one undescribed species, although there are other described species from other fossil localities - Bear Gulch, Montana (

Brian and Joyce of the Youtube channel BeHistoric have a fascinating episode about the "Great Chicago Portage". They layout the history from the Ice Age to the Native American peoples through to modern times. In this video documentary (#89), we explore the great Chicago Portage, used for hundreds or even thousands of years by indigenous people and then later by European explorers and traders, as a passage between the Great Lakes watershed and the Mississippi River watershed.

The actual museum opens on May 22nd, 2026, but the Field Museum has an early look in a new exhibit! In this special exhibition, you’ll immerse yourself in the worlds of Pokémon and natural history with models of fan-favorite Pokémon, real fossil excavation and preparation tools, as well as exhibition soundscapes. Three Field Museum scientists—Arjan Mann, Akiko Shinya, and Jingmai O’Connor—will be featured in the North American debut of…

This is the “Fossil Friday” post #286.  Expect this to be a regular feature of the website.  We will post fossil pictures you send in to [email protected].  Please include a short description or story.  Check the #FossilFriday Bluesky/Twitter hash tag for contributions from around the world! For this week's Fossil Friday, we have a Rhabdoderma exiguum. R. exiguum…

This is Throwback Thursday #286. In these, we look back into the past at ESCONI specifically and Earth Science in general. If you have any contributions, (science, pictures, stories, etc …), please send them to [email protected]. Thanks!  email:[email protected]. The following piece appeared in the September 1966 edition of the ESCONI newsletter. The attribution is from "Rock Chips" of Spokane, but a little research (on the Spokane Rock Rollers Facebook group) led to the…

The 2025 Mazon Creek Fossil Day will be held on October 11th, 2025 at the Coal City Library from 10 AM to 3 PM. See you there! Previous events October 16th, 2023 October 21st, 2024

This is Mazon Monday post #290.  What’s your favorite Mazon Creek fossil?  Tell us at email:[email protected]. There was lots of fun on the field trip to the Danville Spoil Pile on Saturday, September 27th, 2025. The day was hot and dry with a clear sky and temperatures in the 80s... summer like weather in late September is always nice!

An artist’s reconstruction Zavacephale in a Cretaceous landscape.Credit...Masato Hattori The New York Times has a fascinating look at beautiful pachycephalosaur specimen from Mongolia. The animal was recently described in a paper in the journal Nature. Zavacephale rinpoche was found in the Gobi Desert by Tsogtbaatar Chinzorig, a paleontologist at North Carolina State University. The name means “root” and “jewel” in Tibetan, which is a reference to the fossil's age, 115 to 108 million years old, about 14 million years earlier than scientists had thought these dinosaurs first evolved their helmet-like heads.

The ancestors of giant birds like common rheas were likely able to fly long distances, fossils suggest. (Image credit: Mickael Nigay / 500px via Getty Images) LiveScience has a story that looks a paper about flightless birds and how they may have dispersed across multiple continents. The paper "Quantitative analysis of stem-palaeognath flight capabilities sheds light on ratite dispersal and flight loss" was published in the journal…

This is the “Fossil Friday” post #285.  Expect this to be a somewhat regular feature of the website.  We will post any fossil pictures you send in to [email protected].  Please include a short description or story.  Check the #FossilFriday Bluesky/Twitter hash tag for contributions from around the world! We have a beautiful Palaeoxyris lewisi shark egg case from Mazon Creek for this week's Fossil Friday.

This is Throwback Thursday #285. In these, we look back into the past at ESCONI specifically and Earth Science in general. If you have any contributions, (science, pictures, stories, etc …), please send them to [email protected]. Thanks! email:[email protected]. Purple quartz, more commonly known as amethyst from Bancroft, Ontario, Canada. 25 Years Ago – October 2000 The ESCONI Flea Market was held on October 7th, 2000.

Dinosaur diggers work by lantern light at Triceratops Gulch near Glenrock. To maximize the on-site, down-and-dirty experience for participants, summer excavations extend into the evening, so the search for turtle shell, Triceratops ribs, and T.rex teeth can continue. (Andrew Rossi, Cowboy State Daily) Want to dig for dinosaurs? Well... there a place near Glenrock, Wyoming that might be perfect for a vacation next year!

Field trips require membership, but visitors are welcome at all meetings! Sat, Oct 4th Mineralogy Meeting - 7:30 at the College of DuPage Technical Education Center (TEC) Building – Room 1038B (Map) – “Calcite” Fri, Oct 10th General Meeting – 8 PM – via Zoom (TBA). Foreman Bandama of the Field Museum will be presenting “Great Zimbabwe among its peers: Exploring the height of ancient civilizations in southern Africa.”

The ESCONI Mineral Study Group will meet on Saturday October 4, 2025 at 7:30 PM in TEC 1038B at College of DuPage in Glen Ellyn. See Directions and Map below. The program will be on "Calcite", presented by Mike Litt and Dave Carlson. Calcite has the largest variety of forms of any mineral, and may be the most-collected mineral in the world.

This is Mazon Monday post #289. What’s your favorite Mazon Creek fossil? Tell us at email:[email protected]. More exciting Mazon Creek research is out. This is a short paper in the journal Vertebrate Anatomy Morphology Palaeontology (VAMP), which details the first occurrence of the urocordylid Ctenerpeton remex in the Mazon Creek fossil deposit! Arjan Mann, a curator of early fossil vertebrates at the Field Museum of Natural History, instigated the research when he found detailed notes and a partial description by John Bolt, his predecessor.

Deep-Earth diamond.  Yael Kempe and Yakov Weiss Scientific American has a story about the formation of diamonds. Inclusions are imperfections in gem stones. They are tiny bits of the surrounding rock when the gem or crystal forms. Inclusions in two diamond samples from South Africa are shedding light on how diamonds form deep in Earth's mantle. The two new diamond samples each contain inclusions of carbonate minerals that are rich in oxygen atoms (a state known as oxidized) and oxygen-poor nickel alloys (a state known as reduced, in the parlance of chemistry).

PBS Eons has a new episode. This one is about the "Age of Sharks" or should it be the "Age of Weird Sharks". Long before the rise of the great whites and hammerheads we know today, sharks and their cartilaginous relatives ruled Earth’s oceans and rivers in astonishing variety. It was the golden age of sharks. But why did sharks get so incredibly diverse and odd during this period, only to lose most of that diversity forever? Also, special thanks to Joschua Knüppe for providing those gorgeous faunal overviews of the Bear Gulch and Cleveland Shale formations!

This is the “Fossil Friday” post #285. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to [email protected]. Please include a short description or story. Check the #FossilFriday Bluesky/Twitter hash tag for contributions from around the world! We have a very special specimen of Alethopteris lonchitica for this weeks "Fossil Friday".

This is Throwback Thursday #284. In these, we look back into the past at ESCONI specifically and Earth Science in general. If you have any contributions, (science, pictures, stories, etc …), please send them to [email protected]. Thanks! email:[email protected]. If you follow our Throwback Thursday "Looking Back At ESCONI" posts, you may have noticed the entry mentioning Isabel Bassett Wasson in the…

Researchers armed with CRISPR looked to the embryos of zebrafish to understand the genetic changes that led to the evolution of hands and feet. Credit...Pablo Bou Mira/Alamy Carl Zimmer has an interesting post about the evolution of hands. It appears it all started about 360 million years ago... Now the precise DNA-editing technology known as CRISPR is letting scientists reconstruct this ancient evolutionary change in molecular detail.

There were some very interesting things on display at the September 2025 Paleontology Meeting. The theme of the night was "Show and Tell". We had over 20 attendees with everything from Mazon Creek to crinoids to nautiloids to a large model of a Velociraptor. John Catalani, Paleontology Study Group chairman, gave us a preview of his October presentation on…