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Photographing nature, birds, and animals is one of Jack’s favorite pastimes. Connect with Jack and Connect with Science!

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In August of 1989 Scott Harvey, the Museum of the

In August of 1989 Scott Harvey, the Museum of the Rockies exhibits carpenter said he was going hang gliding near Strickland Creek, a tributary of the Yellowstone River. I told him to be on the lookout for fossils because there is Jurassic Morrison Formation rocks exposed along that creek. A few days later Scott walked into my office with an anterior caudal vertebra of a sauropod. He said he landed on it. We began excavations there in 1990 and concluded them in 2016 after collecting portions of 4 sauropod skeletons (3 with skulls) and 1 theropod leg. I’m not much into sauropods but the scenery there was certainly nice. 🦕In the photo are Field Crew Chief Bob Harmon (foreground), Cary Woodruff (sauropodologist) to the right under the hat, and historian Cindy Ott. Photo from 2013. #fossilfriday

Decided to start off the new year by washing some

Decided to start off the new year by washing some sediment from a Judith River site known as “Mammal One” a site discovered by my friends the late Bob Makela and Larry French. Bill Clemens, who died last month, claimed that Mammal One was one of the best Cretaceous mammal sites in the world. Two summers ago I collected a quart size zip lock bag of dirt from the site and today washed it, screened it, and am now picking out really tiny, cool fossils. This photo is about 1.5 centimeters wide. Mostly finding the skeletal remains of fish, but have also found a few worn, baby hadrosaur teeth, two baby theropod teeth, one mutituberculate mammal tooth, and what I think is a frog vertebra. #fossilfriday

Coronal section through a 2 cm wide juvenile hadro

Coronal section through a 2 cm wide juvenile hadrosaur (Hypacrosaurus) sacral vertebral centrum.

Posterior view of a young freshwater crocodile sku

Posterior view of a young freshwater crocodile skull. Posterior views of skulls are hard to find! #animalskulls

Cross section of a T. rex tooth socket showing a s

Cross section of a T. rex tooth socket showing a smaller, newer tooth (oval) migrating into a resorbed pocket (C shape) in the base of an larger, older, tooth. Dinosaurs had replacement teeth through their lives. The image is about 5 cm wide. #fossilfriday

A basket full of #fossilfriday representatives and

A basket full of #fossilfriday representatives and a lone descendant!

“We need more.” “More what?” “Teeth. We

“We need more.”
“More what?”
“Teeth. We need more teeth!”
Gray Mitchell (#tysimpkins) #jurassicworld

In preparation for my honors class “Dinosaurs: I

In preparation for my honors class “Dinosaurs: In Science and the Media,” I’ve done my upmost to get these extinctophytes to self-distance, but it’s been a chore! The Thyreophorans are naturals, but the morginocephalians are having their typical identity crises! The sorrypods don’t understand the situation although they like the idea of wearing masks, and the theropods are convinced it’s all a hoax to keep them from having lunch. The spinosaurs are chasing silverfish, and the therizinosaurs are scaring the crap (coprolites) out of everyone, including me...

The Cretaceous Dakota Sandstone Near Bryce Canyon

The Cretaceous Dakota Sandstone Near Bryce Canyon National Park, Utah #brycecanyon

It was a fun way to get to those out of the way ou

It was a fun way to get to those out of the way outcrops... July 23, 2003 Hell Creek Formation, MT

The baby parrot (conure) grooms himself while lyin

The baby parrot (conure) grooms himself while lying on his back... #birdsaredinosaurs

The microstructure of an Armored dinosaur’s armo

The microstructure of an Armored dinosaur’s armor is pretty awesome under a polarizing microscope. #dinosaurhistology

#blackouttuesday

#blackouttuesday

Juvenile Triceratops prorsus by John Sibbick. #tr

Juvenile Triceratops prorsus by John Sibbick. #triceratops #montanadinosaurs

Preening parakeet

Preening parakeet

Cherry-headed conure feeding on the male flowers o

Cherry-headed conure feeding on the male flowers of the white mulberry tree. 🦜 #beautifulbirds #birdsaredinosaurs #orangecountyparrots

#earthday2020 #birdsaredinosaurs

#earthday2020
#birdsaredinosaurs

You ever have one of those moments when sorting th

You ever have one of those moments when sorting through old photos where you stop and think... “is that really me?” My Princeton University field crew had just discovered Egg Mountain, and my brother Jim and sister Rosemary had come to our camp to visit. It was 1979, I was 33... obviously already had a serious problem with my hair.. my brother was a serious tough guy and my sister was always happy and smiling. #throwbackthursday

Hangin out in the home office in seclusion with th

Hangin out in the home office in seclusion with the non-self-distancing, social ornithischians..

Finishing final edits of the Vertebrate Paleontolo

Finishing final edits of the Vertebrate Paleontology of Montana with Dale Hanson for the bicentennial volume on the Geology of Montana.
Discoserra pectinodon Lund, 2000 from the Mississippian Bear Gulch Limestone, Fergus Co., MT #FossilFriday

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