Rock formations and unusual geologic structures :exploring the earth's surface (Living earth)

Earth :inside and out

An introduction to fossils and minerals : seeking clues to the earth's past

Reading the rocks : the autobiography of the earth

Discovery Channel rocks & minerals : an explore your world handbook

Powers of nature

Chesapeake invader :discovering America's giant meteorite crater

Inside the earth

Planet earth

Earth : an intimate history

Earth story : the shaping of our world

The history of earth : an illustrated chronicle of our planet

Measuring eternity : the search for the beginning of time

Geology rocks! : 50 hands-on activities to explore the earth

T. rex and the crater of doom

Nature's extremes : inside the great natural disasters that shape life on earth

Dirtmeister's nitty gritty planet Earth : all about rocks, minerals, fossils, earthquakes, volcanoes, and even dirt!

Rockin' rocks

Shaping the earth

The geology of Pennsylvania

Basin and range

The practical geologist

Explore rocks and minerals!

Rising from the plains

The magic school bus : inside the Earth

Leo Geo and his miraculous journey through the center of the earth

A history of Earth : in 100 groundbreaking discoveries

The man who found time : James Hutton and the discovery of Earth's antiquity

Snowball Earth : the story of the great global catastrophe that spawned life as we know it

The mountains of Saint Francis : discovering the geologic events that shaped our earth

Earth : by the numbers

The Earth book

Geology

Roadside geology of Pennsylvania

Outstanding scenic geological features of Pennsylvania

Geology the study of rocks

The geology of Centre County

In suspect terrain

One strange rock

Prehistoric world

Annals of the former world