I was disappointed in this book because nowhere did Amazon Indicate that it was a book for children. For 9.99 I expected something of more depth and substance. I feel a bit ripped off. That said, it is a well done, albeit very short, booklet or perhaps even a pamphlet.

I have been facinated by geology since grade school and this book makes it personal since I grew up in Michigan.

My husband is a Geologist and our son loves collecting rocks with him. So we got this book so that he (our son) has a better understanding of our State. The drawings are very nice.

This book is short and too the point. I just wanted to get some basic knowledge of what's under Michigan and how it was formed.

When I was a child during the Cold War, I was told that our village (population 935) was a target for a Soviet atomic bomb because we lived next to the largest natural gas storage facility east of Texas. We practiced crouching under our desks like millions of other American children, but search as I might when we were let out of school, I never found the gigantic accumulation of storage tanks that I was expecting.

This book explains why: the gas is stored deep underground in the porous rock of ancient coral reefs!

"Under Michigan" has got all sorts of really cool information about the geology of this state, written in a fashion that kids should find easy to understand--this book is only 50 pages long, with many full-color drawings. It is arranged in chronological order, with a bit of plate tectonics, and short explanations of why our rocks and fossils are arranged in the order they're found.

I had always thought that Michigan was geologically dull compared to say, Colorado or California. Basically, our state was a big bowl filled with sea water during much of the Paleozoic Era. Then it got scraped and graded by Pleistocene glaciers, and covered with detritus that the glaciers left behind.

However, this geologist-author uncovers many interesting facts about Michigan's beginnings. For instance, "one of the world's oldest known megascopic fossils--a fossil we are able to see without a microscope--was found in the U.P. It is about 2.1 billion years old."

This book was published in 2005, and has a glossary and a list of "Places to Learn More about Michigan's Rocks and Fossils." For those who would like to dig a bit more deeply into this fascinating subject, I can recommend "Geology of Michigan" by John A. Dorr, Jr. and Donald F. Eschman.