Most people recognize Michigan by its mitten-shaped Lower Peninsula
and the Great Lakes embracing the state. Underneath the earth's
surface, however, is equally distinctive evidence of an exciting
history. Michigan rests on sedimentary rocks that reach down into
the earth's crust more than 14,000 feet--a depth three-and-a-half
times more than the layers of rock in the Grand Canyon. Within
these layers of rock rest all sorts of ancient fossils and minerals
that date back to the eras when tropical seas spread across
Michigan and hot volcanoes flung molten rock into its skies--long
before mile-thick glaciers bulldozed over Michigan and plowed
through ancient river valleys to form the Great Lakes. Under
Michigan is the first book for young readers about the geologic
history of the state and the structure scientists call the Michigan
Basin. A fun and educational journey, Under Michigan explores
Earth's geological past, taking readers far below the familiar
sights of Michigan to explain the creation of minerals and fossils
and show where they can be found in the varying layers of rock.
Readers will learn about the hard rock formations that define
Michigan's shape and also discover the tall mountain ridges hidden
at the bottom of the Great Lakes. With full-color illustrations by
author Charles Ferguson Barker, a glossary of scientific terms, and
a page to keep field notes, Under Michigan is a wonderful resource
for young explorers to use at home, in school, or on a trip across
Michigan.
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