Roadside Geology of Wisconsin From South America the book contains a compelling

the book contains a compelling history of how rocks are formed

See Labradorite

Next comes a description of the crystal structure

A great guidebook featuring full-color photos of hundreds of rocks and gems for collectors and enthusiasts

About 9 - 11 pieces per pound

Roadside Geology of Wisconsin From South America the book contains a compellingBy: Robert H. Dott, Jr. & John W. Attig From back cover: Discover the ice sculpted landscape that intrigued and inspired John Muir, Aldo Leopold, and Frank Lloyd Wright. From potholes carved into Precambrian basalt by torrential floods of glacial meltwater to the fossil tracks of ancient slug like creatures that crawled across tidal flats 500 million years ago, the rocks and landforms of Wisconsin reveal a captivating geologic story that spans 2. 8