SKU: 86444585427

Jurassic Underground

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Description

Jurassic UndergroundA desolate location in southeastern Wyoming, named Como Bluff, has a reputation as one of the best late Jurassic dinosaur fossil localities in the world. Late Jurassic is the time period from about 160 to 145 million years ago. The location was given the name Como Bluff in the 1800s when the Union Pacific Railway was being built through the area. In about 1865, examples of huge fossilized bones were sent to certain eastern US universities and museums

A desolate location in southeastern Wyoming, named Como Bluff, has a reputation as one of the best late Jurassic dinosaur fossil localities in the world. Late Jurassic is the time period from about 160 to 145 million years ago. The location was given the name Como Bluff in the 1800’s when the Union Pacific Railway was being built through the area.

In about 1865, examples of huge fossilized bones were sent to certain eastern US universities and museums and several distinguished vertebrate paleontologists traveled to Como Bluff where they found many specimens lying on the surface. Erosion of the Jurassic-age Morrison Formation, the host sedimentary strata, was the source. But, by 2010, after 140 years of surface activity by fossil collectors, there were no remaining fossils at the surface.

A Wyoming University-educated geologist, Mike Mackenzie, who was born and raised in southeast Wyoming, theorized that the best way to search for more Jurassic fossils at this locality would be to excavate in the Morrison Formation underground. Mike envisioned underground viewing points where visitors would be able to see cleared off and exposed dinosaur fossils in the sediments within which they were entombed.

This novel takes the reader underground where mining activity leads to a surprise discovery and unnerving encounters. A number of perceptions about dinosaurs will be questioned as explorers have thrilling and frightening adventures back in time and into dangerous Jurassic situations.

About the Author

R.V. Bailey was born and raised in the small coal mining town of Hanna, Wyoming, just 30 miles west of the world-famous dinosaur locality known as Como Bluff. After graduating from the University of Wyoming with a degree in geology, R.V. was appointed mine geologist for an underground uranium mine 35 miles north of Como Bluff. In that position, he developed a new theory on the deposition of uranium in the Eocene sand deposits, a theory which still stands worldwide today. Later, he carried out successful gold exploration in Alaska and, after closely observing killer whales, wrote a science fiction novel about them. Returning to Wyoming and continuing geologic studies, he decided to write about a concept he had conceived years ago: going underground to recover more fossils at Como Bluff. There were no more fossils to be found at the surface. His in-depth knowledge of underground mining, the terrain, and wildlife helped bring this novel to life. His interest in Como Bluff and dinosaur fossils grew through viewing the Morrison Formation in southeast Wyoming and while visiting museums and old excavation sites. R.V. has always been interested in dinosaurs, finding their size astounding.

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SKU: 86444585427

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4.5 ★★★★★
Based on 18 reviews
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Verified Purchase
Denise Boyd
Omaha, US
★★★★★ 4
Great toy but if your dog is an aggressive chewer, please think twice.
Color: Crinkle Chicken (Brown), Size: Large
I received this on May 23rd and on June 8th, after playing with this thing every day, our recently acquired 36 lb dog finally ripped it open and got out all the plastic and the squeaky part. Lily Belle will miss you, chicken. Lily loooooved this toy! She'd toss it in the air, chew on it, pull it with her teeth etc. but as much as she loved it, we won't replace it. It's just not durable enough for her. If your dog is an aggressive chewer, you might want to try a different toy. I hate that this lasted just a smidge over two weeks because Lily seemed to truly enjoy this toy. RIP, squeaky chicken!
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Reviewed in the United States on June 9, 2026
L
Verified Purchase
Literally doesn’t work
Grantham, US
★★★★★ 5
Great Value Toy
Color: Crinkle Duck (Blue), Size: Large, Color: Crinkle Duck (Blue), Size: Large
This toy has been one of my dog’s absolute favorites. He gets excited every time he sees it and will carry it around the house, toss it in the air, and keep himself entertained for a long time. The shape and texture seem perfect for him, and it quickly became one of his go-to toys over everything else in his basket. What I really like is that it holds up reasonably well for the price. It’s definitely not indestructible, and after a lot of play, it will sometimes start to rip—usually around the feet first since that’s where my dog tends to grab and chew the most. But honestly, considering how affordable it is, I don’t mind replacing it when needed. It’s inexpensive enough that rebuying feels worth it because he genuinely loves it that much. I’d rather keep buying a toy he is obsessed with than spend more on something that just sits untouched. It’s fun, cute, and keeps him happy, which is what matters most. Overall, I’d definitely recommend it for dogs who love plush toys and playful chewing.
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Reviewed in the United States on April 28, 2026
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Verified Purchase
Lady B
Los Angeles, US
★★★★★ 5
Best affordable squeaker toy
Color: Crinkle Chicken (Brown), Size: Large, Color: Crinkle Chicken (Brown), Size: Large
my dog is obsessed with this toy, this has became his new comfort toy and after having this for about four months the legs are falling off but it’s very durable. The squeaker also moved from the head of the chicken to the body of the chicken but that’s after it was played with every single day. I love that it has two squeakers and it’s the perfect toy for my dog.
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Reviewed in the United States on May 6, 2026
A
Verified Purchase
Amazon Customer
Natrona Heights, US
★★★★★ 5
My dogs favorite toy EVER
Color: Crinkle Chicken (Brown), Size: Large
I have a Belgian Malinois who loves any and every toy, but this one is definitely her favorite. She will walk around the house constantly carrying it in her mouth, which is honestly adorable to watch. The squeakers only lasted a couple of months, but I don’t really consider that a downside—I’m kind of grateful they didn’t last forever given how much she plays with it. It still remains one of her most-loved toys even without them. My only word of caution is that if you work from home, this toy makes a lot of crinkling noise. And I mean A LOT. It’s great for keeping the dog entertained, but it can definitely get a little frustrating for humans trying to focus or take calls. Overall, it’s been a big hit in our house and easily one of her favorite toys.
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Reviewed in the United States on June 8, 2026
A
Verified Purchase
Amazon Customer
Phoenix, US
★★★★★ 5
Super cute
Color: Bunny (Mauve), Size: Small
Super cute and fuzzy. Definitely perfect size for a puppy and not too loud. The fur is very soft and the nose is sown on not a hard piece that can be chewed on. Very good quality too.
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Reviewed in the United States on June 3, 2026

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