Tag: Green River
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2026 ESCONI Gem, Mineral, and Fossil Show – Preview #35: Priscacara, sp. from the Green River Formation in Wyoming
What fossil show is complete without a Green River fish? Here is a nice Priscacara, sp. These fish date to the Eocene, about 50 million years ago. We have other Green River fish, come on out and see them!
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ESCONI January 2026 Paleontology Meeting – February 21st, 2026 at 7:30 PM – “Death to Discovery: Taphonomy of the Fossil Lake Lagerstatten”
Arvid Aase , Head Curator at Fossil Butte National Monument in Wyoming, will present “Death to Discovery: Taphonomy of the Fossil Lake Lagerstatten (Green River Group).” Lakes are divided into three types: overfilled, balance-filled, and under-filled. The characteristics of a balance filled lake create the greatest opportunity for conditions conducive to fossil preservation. Fossil Lake…
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2025 ESCONI Gem, Mineral, and Fossil Show – Preview #6: Diplomystus dentatus from the Green River
This is the preview post #6 for the 2025 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2025 will be held on March 15th and 16th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
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Fossil Friday #168: Ivy Leaf from the Green River
This is the “Fossil Friday” post #168. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! Something different today… How about a fossil…
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Smithsonian: Paleontologists Discover 52-Million-Year-Old Bat
Smithsonian Magazine has a story about a fossil bat from Wyoming. Bats are underrepresented in the fossil record due their small size and even smaller bones. Unfortunately, they also live in areas that don’t usually form fossils. The Green River Formation in Wyoming, which dates to the Eocene about 52 million years ago, has yield…
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2023 ESCONI Gem, Mineral, and Fossil Show – Preview #21!
This is the preview post #21 for the 2023 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2023 will be held on March 18th and 19th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
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Fossil Friday #148: Phareodus encaustus
This is the “Fossil Friday” post #148. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! Today, we have a very nice Phareodus…
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Throwback Thursday #97: Fishing the Eocene Age
This is Throwback Thursday #97. 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 esconi.info@gmail.com. Thanks! An article from FRIENDS magazine entitled “Fishing the Eocene Age” appeared back in the January 1972 edition of…
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Scientists name new frog-legged beetle fossil for Sir David Attenborough
Phys.org has a story about a newly described fossil insect. The beetle, Pulchritudo attenboroughi, is named for Sir David Attenborough. The name means “Attenborough’s Beauty”. It was found in what is now Colorado in the famous Green River Formation. The full description of the insect appeared in a paper in the journal Papers in Paleontology.…
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Fossil Friday #49: Insects from the Eocene, Green River Formation, Colorado
This is the “Fossil Friday” post #49. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! Today’s interesting contribution comes from ESCONI 1st…
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Fossil Friday #4: Green River Fish
This is the “Fossil Friday” post #4. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! This week we visit the Green River…
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UChicago: Fish story for the ages: High schooler unearths rare fossil
The University of Chicago has a post about a recent Green River find. A very interesting gar fish skull was found this summer by a high school student in Lance Grande’s “Stones and Bones” program at the University of Chicago this last summer. The specimen comes from a fish estimated to be 8 feet long! …
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Updated & New Field Trip Information
Friday, May 7 St.Paul Indiana Fossils. Free. Meet at 8:00 am Indiana time (7:00 am Chicago Time) Hard Hat required. An Estwing rock hammer is the best tool. Knee pads, backpacks, fanny packs are also a plus. Age limit in Indiana is 18 years. Check the web site for details or contact John Good at…
