SKU: 66639110053

Michigan Rocks!

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Michigan Rocks!A Guide to Geologic Sites in the Great Lakes State Paul Brandes Michigan is the only state in the nation to border four of the five Great Lakesgiving it the nickname, the Great Lakes State. This abundance of shoreline translates to a multitude of rock exposed by waves and currents. Nearly the entire history of Earth is on display in Michigan, from 3. 6 billion year old gneisses to potholes drilled by modern rivers. Michigan Rocks! guides you to 56

A Guide to Geologic Sites in the Great Lakes State

Paul Brandes

Michigan is the only state in the nation to border four of the five Great Lakes—giving it the nickname, the Great Lakes State. This abundance of shoreline translates to a multitude of rock exposed by waves and currents. Nearly the entire history of Earth is on display in Michigan, from 3.6-billion-year-old gneisses to potholes drilled by modern rivers. Michigan Rocks! guides you to 56 world-class geologic sites scattered from Isle Royale and the Upper Peninsula to Lower Michigan, including Michigan’s Thumb, where carvings in sandstone are preserved at Sanilac Petroglyph State Historic Park. Many of the well-chosen sites are two-fers; you get a good look at ancient features in a rock from time immemorial and see the damage wrought on that same rock by recent glacial ice and erosion. The author’s explanations of the geologic processes at work, along with photographs, illustrations, and informative figures and maps, make this the perfect field guide for amateur and expert geologists alike—and everyone in between!

A good map, an urge to discover, and this guidebook are all you need to explore and become well-versed in the distinct geology of Michigan. Look for Lake Superior agates that formed during the same magmatic event that was responsible for depositing Michigan’s copper. Witness the collision of ancient continents at Piers Gorge on the Menominee River. Contemplate the underground havoc caused by the everyday dissolution of limestone at Thunder Bay and Fiborn Karst Preserves. And don’t forget to stop by Petoskey State Park to search for your very own coral fossil, the state stone of Michigan.

144 pages, 9 x 8.375, paperback
ISBN 978-0-87842-712-3

The Geological Society of America

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SKU: 66639110053

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Ron
Draper, US
★★★★★ 3
For me this was a waste of money.
I doesn't bite well to my skimmer opening eventually the current will spin it out of angle. I would never buy another one. Maybe its because my opening it tile so it can't bite it hard enough when expanded.
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Reviewed in the United States on October 20, 2024
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Nicole W
Chelsea, US
★★★★★ 5
Dog’s favorite
I don’t get the appeal of this toy, but the dogs love it. Easy to play fetch with, the dogs even use it as a tug toy occasionally. My Lab loves it so much, it’s her toy that she takes to bed with her every night. Glad I purchased it; well worth it.
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Reviewed in the United States on September 19, 2020
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Dana C. Ingram
Lexington, US
★★★★★ 2
Cheap plastic
My dog destroyed this in matter of minutes
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Reviewed in the United States on January 15, 2025
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Lauren B. Smith
Houston, US
★★★★★ 5
One of my dog’s favorite toys.
This is one of my dog’s favorite toys. She loves figuring out how to pull the crinkly part out of the rubber tube, and she loves chewing on the spiky rubbery tube. I have to replace this toy often because my dog also likes to pull pieces of rubber off of the tube. She doesn’t ingest the rubber; she just loves the act of pulling it all apart. I am still giving this toy 5 stars because my dog loves this toy and it keeps her busy.
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Reviewed in the United States on January 17, 2026
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Amazon Customer
Carnegie, US
★★★★★ 2
Not a durable toy.
This only lasted a few minutes before it was destroyed by our dog. Not made well for chewing.
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Reviewed in the United States on May 12, 2026

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