ESCONI
@esconi.bsky.social
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Throwback Thursday #321: The Fossil Legacy of Thomas Jefferson #TBT #ThrowbackThursday #history #ThomasJefferson #mammoth The following article "The Fossil Legacy of Thomas Jefferson" by Trick Runions, a…
https://esconi.org/2026/06/throwback-thursday-321-the-fossil-legacy-of-thomas-jefferson/
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Throwback Thursday #321: The Fossil Legacy of Thomas Jefferson
The following article "The Fossil Legacy of Thomas Jefferson" by Trick Runions, a long-time ESCONI member, first appeared in the May-June edition of the Flatirons Mineral Club newsletter "Flatirons Facets".
https://esconi.org/2026/06/throwback-thursday-321-the-fossil-legacy-of-thomas-jefferson/?utm_source=bluesky&utm_medium=jetpack_social
about 22 hours ago
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Protect Yourself from Ticks! #ticks #safety #health #nature It's a bad year for ticks, so be very careful out there. Remember, do frequent tick checks and use insect repellent!...
https://esconi.org/2026/06/protect-yourself-from-ticks/
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Protect Yourself from Ticks!
It's a bad year for ticks, so be very careful out there. Remember, do frequent tick checks and use insect repellent!
https://esconi.org/2026/06/protect-yourself-from-ticks/?utm_source=bluesky&utm_medium=jetpack_social
2 days ago
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ESCONI June 2026 General Meeting, Friday, June 12th, 2026 at 8:00 PM via… #fossils #paleontology #paleoart #FieldMuseum
https://esconi.org/2026/06/esconi-june-2026-general-meeting-friday-june-12th-2026-at-800-pm-via-zoom-at-the-intersection-of-art-and-science-outreach-in-natural-historymuseums/
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ESCONI June 2026 General Meeting, Friday, June 12th, 2026 at 8:00 PM via Zoom – “At the Intersection of Art and Science: Outreach in Natural HistoryMuseums”
The ESCONI June 2026 General Meeting will be held via Zoom at 8:00 PM on Friday, June 12th, 2026. Adrienne Stroup, Geological Collections, Vertebrate Paleontological Loan Manager, PaleoArtist/Scientific Illustrator from The Field Museum will be presenting "At the Intersection of Art and Science: Outreach in Natural History Museums." Adrienne will talk about the vertebrate paleontological collections at the Field Museum and how she has used her skills as an artist to reach different audiences at the museum.
https://esconi.org/2026/06/esconi-june-2026-general-meeting-friday-june-12th-2026-at-800-pm-via-zoom-at-the-intersection-of-art-and-science-outreach-in-natural-historymuseums/?utm_source=bluesky&utm_medium=jetpack_social
3 days ago
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Mazon Monday #325: Braceville Spring 2026 Field Trip Report This is Mazon Monday post #325. What’s your favorite Mazon Creek fossil? Tell us at email:
[email protected]
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Mazon Monday #325: Braceville Spring 2026 Field Trip Report
This is Mazon Monday post #325. What’s your favorite Mazon Creek fossil? Tell us at email:
[email protected]
. We held our spring Braceville field trip a few weeks ago. The weather was nearly perfect... partly cloudy with temperatures in the high 70's and low 80's each day. Field Trip Chairman Jeremy Zimmerman was working hard to get everyone checked in. Of course, there were many familiar faces and quite a few new ones.
https://esconi.org/2026/06/mazon-monday-325-braceville-spring-2026-field-trip-report/?utm_source=bluesky&utm_medium=jetpack_social
4 days ago
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PBS Eons: 100 million years ago, squid suddenly took over the oceans PBS Eons has a new Youtube Short.
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PBS Eons: 100 million years ago, squid suddenly took over the oceans
PBS Eons has a new Youtube Short.
https://esconi.org/2026/06/pbs-eons-100-million-years-ago-squid-suddenly-took-over-the-oceans/?utm_source=bluesky&utm_medium=jetpack_social
5 days ago
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High-Energy X-Ray CT Scanning of large, dense fossils #fossils #paleontology #dinosaurs #UniversityOfChicago #PaulSereno #SuperCroc Today's post comes from Ravi Chandran and Tyler Keillor. Ravi Chandran is an ESCONI…
https://esconi.org/2026/06/high-energy-x-ray-ct-scanning-of-large-dense-fossils/
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High-Energy X-Ray CT Scanning of large, dense fossils
Today's post comes from Ravi Chandran and Tyler Keillor. Ravi Chandran is an ESCONI member and volunteer in Paul Sereno's lab. Tyler Keiller is Manager of the fossil lab and past ESCONI member. He has presented at Paleofest and for ESCONI in the past. He is also paleo-artist. The Fossil Lab in Washington Park (5437 S Wabash Avenue) holds an Open House each month on the second Thursday (April 9 - November 12) from 3:30-5pm.
https://esconi.org/2026/06/high-energy-x-ray-ct-scanning-of-large-dense-fossils/?utm_source=bluesky&utm_medium=jetpack_social
6 days ago
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Fossil Friday #320: Tully Monster Repeat! For this week’s Fossil Friday, we’re featuring our first-ever repeat fossil. It was special before and you'll see why it's even more special now. This remarkable Tully Monster specimen…
https://esconi.org/2026/06/fossil-friday-320-tully-monster-repeat/
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Fossil Friday #320: Tully Monster Repeat!
For this week’s Fossil Friday, we’re featuring our first-ever repeat fossil. It was special before and you'll see why it's even more special now. This remarkable Tully Monster specimen comes from longtime ESCONI member Jeremy Zimmerman. You could even say that this particular fossil is getting its third chance at fame.
https://esconi.org/2026/06/fossil-friday-320-tully-monster-repeat/?utm_source=bluesky&utm_medium=jetpack_social
7 days ago
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Throwback Thursday #317: Looking Back At ESCONI For June 2026
#history
#TBT
#ThrowbackThursday
#macfallite
#fluorite
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Throwback Thursday #317: Looking Back At ESCONI For June 2026
25, 50, and 70 years ago
https://esconi.org/2026/06/throwback-thursday-317-looking-back-at-esconi-for-june-2026/?utm_source=bluesky&utm_medium=jetpack_social
8 days ago
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Happy 300th Birthday, James Hutton!
#geology
#science
#scotland
#deeptime
#history
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Happy 300th Birthday, James Hutton!
Today marks the 300th Birthday of James Hutton (1726-1797), a Scottish geologist, argiculturist, chemical manufacturer, naturalist, and physician. He is widely considered to be the "Father of Modern Geology". Hutton was born on June 3rd, 1726 in Edinburgh, Scotland.
https://esconi.org/2026/06/happy-300th-birthday-james-hutton/?utm_source=bluesky&utm_medium=jetpack_social
9 days ago
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ESCONI Events for June 2026
#events
#paleontology
#ESCONI
#museums
#FieldMuseum
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ESCONI Events for June 2026
ESCONI Events for June 2026
https://esconi.org/2026/06/esconi-events-for-june-2026/?utm_source=bluesky&utm_medium=jetpack_social
10 days ago
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Wait, Is That Poison Ivy?
#posionivy
#nature
#summer
#spring
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Wait, Is That Poison Ivy?
It's that time of year again. You're out working in the garden, or hiking through the woods, looking for fossils (of course!). The New York Times had an article about poison ivy a few weeks ago. Hopefully, it will help you identify it, so you don't have to endure a few weeks of intense itching...
https://esconi.org/2026/06/wait-is-that-poison-ivy/?utm_source=bluesky&utm_medium=jetpack_social
10 days ago
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Mazon Monday #324: Stepwise loss of complexity in hagfish eyes prior to deep sea colonization
#fossils
#MazonCreek
#paleontology
#MazonMonday
#hagfish
#evolution
#eyes
#pennsylvanian
#carboniferous
11 days ago
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490-Million-Year-Old Arthropod Fossil Fills Puzzling Gap in Fossil Record
#fossils
#paleontology
#Cambrian
#Ordovician
#Canada
#quebec
#arthropods
#evolution
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490-Million-Year-Old Arthropod Fossil Fills Puzzling Gap in Fossil Record
SciNews has a story about the discovery of an important arthropod. Magnicornaspis garwoodi lived between 497 and 487 million years ago in the area of Quebec, Canada. The animal is important because it fills in the gap between the Cambian Explosion and the Great Ordovician Biodiversition Event (GOBE). It's discovery hints that the source of this gap is sampling bias not an actual drop in biodiversity. This research was published in the paper "New exceptionally preserved arthropod from the Furongian of Canada" in the journal BMC Biology.
https://esconi.org/2026/05/490-million-year-old-arthropod-fossil-fills-puzzling-gap-in-fossil-record/?utm_source=bluesky&utm_medium=jetpack_social
12 days ago
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PBS Eons: The Second-to-Last Mammoths Ever #paleontology #mammoths #alaska #evolution #PBSEons
https://esconi.org/2026/05/pbs-eons-the-second-to-last-mammoths-ever/?utm_source=bluesky&utm_medium=jetpack_social
13 days ago
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Fossil Friday #319: First Tully! #fossils #paleontology #FossilFriday #MazonCreek #pennsylvanian #carboniferous #tully #tullymonster #pit11
https://esconi.org/2026/05/fossil-friday-319-first-tully/?utm_source=bluesky&utm_medium=jetpack_social
14 days ago
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Throwback Thursday #319: Happy 150th Birthday, George Langford! #history #MazonCreek #TBT #ThrowbackThusday #FieldMuseum
https://esconi.org/2026/05/throwback-thursday-319-happy-150th-birthday-george-langford/?utm_source=bluesky&utm_medium=jetpack_social
15 days ago
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Microcoprolite morphotypes from the Revueltian (Upper Triassic:Norian) age Homestead Site, Garita Creek Formation, east-centralNew Mexico, USA
#fossils
#paleontology
#NewMexico
#coprolites
#Trassic
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Microcoprolite morphotypes from the Revueltian (Upper Triassic:Norian) age Homestead Site, Garita Creek Formation, east-centralNew Mexico, USA
The Lauers are back with more science! The paper "Microcoprolite morphotypes from the Revueltian (Upper Triassic: Norian) age Homestead Site, Garita Creek Formation, east-central New Mexico, USA" was published in the journal Ichnos, which is an international journal for plant and animal traces.
https://esconi.org/2026/05/microcoprolite-morphotypes-from-the-revueltian-upper-triassicnorian-age-homestead-site-garita-creek-formation-east-centralnew-mexico-usa/?utm_source=bluesky&utm_medium=jetpack_social
16 days ago
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Sundays on the Boulevard #ESCONI #science #Chicago #Lawndale
https://esconi.org/2026/05/47631/?utm_source=bluesky&utm_medium=jetpack_social
17 days ago
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Mazon Monday #323: Mazon Creek at the 2026 CGMA Show #fossils #paleontology #MazonCreek #MazonMonday #CGMA #pennsylvanian #carboniferous
https://esconi.org/2026/05/mazon-monday-323-mazon-creek-at-the-2026-cgma-show/?utm_source=bluesky&utm_medium=jetpack_social
18 days ago
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Archaeologists Find Egyptian Mummy Buried With the ‘Iliad’
#archaeology
#egypt
#mummy
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Archaeologists Find Egyptian Mummy Buried With the ‘Iliad’
The New York Times has an interesting post about a discovery in Egypt. A 2,000 year old mummy in the burial site known as Oxyrhynchus had a papyrus fragment of the Homeric epic "Iliad" in a clay packet outside its wrappings. The mummy was a non-royal male,
https://esconi.org/2026/05/archaeologists-find-egyptian-mummy-buried-with-the-iliad/?utm_source=bluesky&utm_medium=jetpack_social
19 days ago
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The Pokémon Fossil Museum at the Field Museum is now Open! The Pokémon Fossil Museum at the Field Museum opened on Wednesday, May 20th, 2026. Tickets can be purchased here. Tickets are required for entry and should be purchased in advance. Here is the FAQ page.
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The Pokémon Fossil Museum at the Field Museum is now Open!
The Pokémon Fossil Museum at the Field Museum opened on Wednesday, May 20th, 2026. Tickets can be purchased here. Tickets are required for entry and should be purchased in advance. Here is the FAQ page.
https://esconi.org/2026/05/the-pokemon-fossil-museum-at-the-field-museum-is-now-open/?utm_source=bluesky&utm_medium=jetpack_social
20 days ago
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Fossil Friday #318: Rex, the Wonder Amphibian #fossils #paleontology #FossilFriday #FieldMuseum #Mississippian #Iowa #tetrapod #Whatcheeria
https://esconi.org/2026/05/fossil-friday-318-rex-the-wonder-amphibian/?utm_source=bluesky&utm_medium=jetpack_social
21 days ago
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Throwback Thursday #318: 2001 Chicagoland Gem, Mineral, and Fossil Show #CGMA #gemshow #gems #minerals #fossils The 2001 Chicagoland Gem, Mineral, and…
https://esconi.org/2026/05/throwback-thursday-318-2001-chicagoland-gem-mineral-and-fossil-show/?utm_source=bluesky&utm_medium=jetpack_social
22 days ago
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Reminder: 49th Annual CGMA Show – May 23rd and 24th, 2026 The 49th Annual CGMA Show will be held May 23rd and 24th, 2026 at the Expo Center of the Kane County Fairgrounds.
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Reminder: 49th Annual CGMA Show – May 23rd and 24th, 2026
The 49th Annual CGMA Show will be held May 23rd and 24th, 2026 at the Expo Center of the Kane County Fairgrounds.
https://esconi.org/2026/05/reminder-49th-annual-cgma-show-may-23rd-and-24th-2026/?utm_source=bluesky&utm_medium=jetpack_social
23 days ago
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ESCONI May 2026 Paleontology Study Group Meeting – “An Ordovician Konzentrat Lagerstätte: The Dixon…
https://esconi.org/2026/05/esconi-may-2026-paleontology-study-group-meeting-an-ordovician-konzentrat-lagerstatte-the-dixon-mifflin-residuum-fauna/?utm_source=bluesky&utm_medium=jetpack_social
23 days ago
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Video for ESCONI May 2026 General Meeting – “Seeing Beneath the Ground: Geophysics and Archaeological…
https://esconi.org/2026/05/video-for-esconi-may-2026-general-meeting-seeing-beneath-the-ground-geophysics-and-archaeological-explorations-in-illinois/?utm_source=bluesky&utm_medium=jetpack_social
24 days ago
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Mazon Monday #322: Asterophyllites longifolius #fossils #paleontology #MazonCreek #MazonMonday #pennsylvanian #carboniferous #calamites #horsetails #paleobotany
https://esconi.org/2026/05/mazon-monday-322-asterophyllites-longifolius/?utm_source=bluesky&utm_medium=jetpack_social
25 days ago
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PBS Eons: The Mystery of the Missing Deep-Sea Fish
#fish
#evolution
#deepwater
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PBS Eons: The Mystery of the Missing Deep-Sea Fish
PBS Eons has a new episode. This one is about the evolution of fish.
https://esconi.org/2026/05/pbs-eons-the-mystery-of-the-missing-deep-sea-fish/?utm_source=bluesky&utm_medium=jetpack_social
26 days ago
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Introducing Laueropterus! #fossils #paleontology #pterosaurs #LauerFoundation #Germany #Jurassic #Germany #Solnhofen
https://esconi.org/2026/05/introducing-laueropterus/?utm_source=bluesky&utm_medium=jetpack_social
27 days ago
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Fossil Friday #317: Silurian Aquatic Scorpion From the Kokomo Limestone #fossils #paleontology #FossilFriday #scorpion #silurian #indiana
https://esconi.org/2026/05/fossil-friday-317-silurian-aquatic-scorpion-from-the-kokomo-limestone/?utm_source=bluesky&utm_medium=jetpack_social
28 days ago
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Throwback Thursday #317: The Fossil Story from Shell Oil Co. I saw this video mentioned the May 1956 edition of the ESCONI newsletter (see Throwback Thursday #316). I vaguely remember this from grade school. It's interesting how our view of paleontology changed with plate tectonics.
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Throwback Thursday #317: The Fossil Story from Shell Oil Co.
I saw this video mentioned the May 1956 edition of the ESCONI newsletter (see Throwback Thursday #316). I vaguely remember this from grade school. It's interesting how our view of paleontology changed with the addition of plate tectonics.
https://esconi.org/2026/05/throwback-thursday-317-the-fossil-story-from-shell-oil-co/?utm_source=bluesky&utm_medium=jetpack_social
29 days ago
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ESCONI May 2026 Paleontology Study Group Meeting Saturday, May…
https://esconi.org/2026/05/esconi-may-2026-paleontology-study-group-meeting-saturday-may-16th-2026-at-730-pm-via-zoom-an-ordovician-konzentrat-lagerstatte-the-dixon-mifflin-residuum-fauna/?utm_source=bluesky&utm_medium=jetpack_social
30 days ago
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ESCONI Field Trip to Mount Orab for Trilobites – Saturday, July 11th, 2026
#fossils
#paleontology
#trilobites
#ohio
#MountOrab
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ESCONI Field Trip to Mount Orab for Trilobites – Saturday, July 11th, 2026
ESCONI will have a field trip to Flat Run Fossils in Mt. Orab, OH on Saturday July 11, 2026. There is an attendance limit of 16 people. Flat Run Fossils is a new pay-to-dig site in the famous Mt. Orab trilobite beds. For many years, thousands of gorgeous Flexicalymene and Isotelus trilobites have been collected from this area. Other possible finds include brachiopods, graptolites, cephalopods, and crinoids. You will certainly walk away with trilobites – they are not hard to find!
https://esconi.org/2026/05/esconi-field-trip-to-mount-orab-for-trilobites-saturday-july-11th-2026/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Mazon Monday #318: So, where's the shrimp?!? #fossils #paleontology #MazonMonday #MazonCreek #shrimp #Carboniferous #Braceville #fieldtrip #history
https://esconi.org/2026/05/mazon-monday-318-so-wheres-the-shrimp/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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A 75-million-year-old fossil reveals a shocking tyrannosaur secret
#fossils
#paleontology
#dinosaurs
#tyrannosaurs
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A 75-million-year-old fossil reveals a shocking tyrannosaur secret
Science Daily has a story about the feeding habits of tyrannosaurs. The diet of tyrannosaurs has been long and sometimes controversial, remember when it was proposed that T-rex was a scavenger? Well a new paper in the journal Evolving Earth, found evidence of cannibalism from marks on a massive tyrannosaur foot bone. Interestingly, the marks were very small and suggest scavenging by a smaller individual.
https://esconi.org/2026/05/a-75-million-year-old-fossil-reveals-a-shocking-tyrannosaur-secret/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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The Rise of Eyes Began With Just One
#evolution
#eyes
#paleontology
#biology
#NYT
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The Rise of Eyes Began With Just One
Carl Zimmer has an interesting article over at the New York Times. He discusses the evolution of eye... but how many eyes? Some of our early ancestors, about 560 million years ago, might have had only one. During the Cambrian Period, 518 million years ago, some early vertebrates from China may have had two pairs of eyes, one on each side and a second pair on the top of their heads.
https://esconi.org/2026/05/the-rise-of-eyes-began-with-just-one/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Fossil Friday #316: Asterophyllites longifolius #fossils #paleontology #MazonCreek #FossilFriday #calamites #horsetail #paleobotany
https://esconi.org/2026/05/fossil-friday-316-asterophyllites-longifolius/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Throwback Thursday #316: Looking Back At ESCONI For May 2026 25, 50, and 70 years ago...
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Throwback Thursday #316: Looking Back At ESCONI For May 2026
25, 50, and 70 years ago
https://esconi.org/2026/05/throwback-thursday-316-looking-back-at-esconi-for-may-2026/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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ESCONI May 2026 General Meeting Friday, May 8th, 2026 at 8:00 PM via Zoom…
https://esconi.org/2026/05/esconi-may-2026-general-meeting-friday-may-8th-2026-at-800-pm-via-zoom-seeing-beneath-the-ground-geophysics-and-archaeological-explorations-in-illinois/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Trilobite Tuesday #50: Penn Dixie: Dig With the Experts 2026 - June 13th and 14th, 2026 #fossils #paleontology #trilobites #devonian #NewYork
https://esconi.org/2026/05/penn-dixie-dig-with-the-experts-2026-june-13th-and-14th-2026/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Mazon Monday #320: A shoot at the root? Unique development and evolution of the stigmarian apical meristem #fossils…
https://esconi.org/2026/05/mazon-monday-320-a-shoot-at-the-root-unique-development-and-evolution-of-the-stigmarian-apical-meristem/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Keweenaw Week 2026 - August 2nd - 9th, 2026 in Michigan's famous Keweenaw Peninsula #minerals #copper #michigan
https://esconi.org/2026/05/keweenaw-week-2026-august-2nd-9th-2026-in-michigans-famous-keweenaw-peninsula/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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PBS Eons: How Dinosaurs May Have Cursed Us With Aging
#fossils
#dinosaurs
#mammals
#evolution
#dinosaurs
#dinosaurs
#paleontology
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PBS Eons: How Dinosaurs May Have Cursed Us With Aging
PBS Eons has a new episode. This one is about how aging in mammals might be due to evolved traits while we lived alongside dinosaurs.
https://esconi.org/2026/05/pbs-eons-how-dinosaurs-may-have-cursed-us-with-aging/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Fossil Friday #315: Eubleptus danielsi #fossils #paleontology #MazonCreek #FossilFriday #Carboniferous #pennsylvanian #insects
https://esconi.org/2026/05/fossil-friday-315-eubleptus-danielsi/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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ESCONI Field Trip to Braceville, IL for Mazon Creek Fossils – Saturday, May 30th and Sunday, May 31st, 2026 #fossils…
https://esconi.org/2026/04/esconi-field-trip-to-braceville-il-for-mazon-creek-fossils-saturday-may-30th-and-sunday-may-31st-2026/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Throwback Thursday #313: Empire Quarry in Bloomington, Indiana Atlas Obscura has an interesting post about the Empire Quarry located in the area of Bloomington, Indiana. This quarry supplied the 18,630 tons of stone used to build the Empire State Building in the 1920's.
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Throwback Thursday #315: Empire Quarry in Bloomington, Indiana
Atlas Obscura has an interesting post about the Empire Quarry located in the area of Bloomington, Indiana. This quarry supplied the 18,630 tons of stone used to build the Empire State Building in the 1920's. Indiana is known for its rocks. Some of the world's finest limestone hails from the area surrounding Bloomington and Bedford, Indiana. Many of our iconic building are constructed of Indiana limestone, including the Empire State Building, the Washington National Cathedral, the Pentagon, and many current state capital buildings.
https://esconi.org/2026/04/throwback-thursday-313-empire-quarry-in-bloomington-indiana/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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PBS Eons: When the Earth Had Supermountains
#geology
#evolution
#PBSEons
#mountains
#fossils
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PBS Eons: When the Earth Had Supermountains
PBS Eons has a new episode. This one is about some truly giant mountains and the evolutionary changes they drove.
https://esconi.org/2026/04/pbs-eons-when-the-earth-had-supermountains/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Science Quickly: The dinosaurs at your window: How birds survived the asteroid that killed all other dinosaurs…
https://esconi.org/2026/04/science-quickly-the-dinosaurs-at-your-window-how-birds-survived-the-asteroid-that-killed-all-other-dinosaurs/?utm_source=bluesky&utm_medium=jetpack_social
about 1 month ago
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Mazon Monday #317: ESCONI Braceville Trip Spring 2005 #fossils #paleontology #MazonCreek #MazonMonday #braceville #wormhill #Carboniferous
https://esconi.org/2026/04/mazon-monday-317-esconi-braceville-trip-spring-2005/?utm_source=bluesky&utm_medium=jetpack_social
about 2 months ago
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Early Triassic Cyclidan Crustacean Had Powerful Jaws
#fossils
#paleontology
#cyclid
#china
#triassic
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Early Triassic Cyclidan Crustacean Had Powerful Jaws
Sci-News has an article about a distinctive, but enigmatic, group of arthropods called Cyclidans. Cyclidans appeared during the Carboniferous and hung around until the Late Cretaceous.
https://esconi.org/2026/04/early-triassic-cyclidan-crustacean-had-powerful-jaws/?utm_source=bluesky&utm_medium=jetpack_social
about 2 months ago
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