Rising from the plains

Basin and range

In suspect terrain

Annals of the former world

Reading the rocks : the autobiography of the earth

Earth :inside and out

The history of earth : an illustrated chronicle of our planet

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

A history of Earth : in 100 groundbreaking discoveries

Underland a deep time journey

Oranges

Pennsylvania caves and other rocky roadside wonders

The founding fish

Measuring eternity : the search for the beginning of time

Earth : an intimate history

The geology of Pennsylvania

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

Planet earth

The practical geologist

Earth story : the shaping of our world

How mountains are made

Earthshake : poems from the ground up

Looking for a ship

My teacher is a dinosaur : and other prehistoric poems, jokes, riddles, & amazing facts

A collection of occasional surveys of iron, coal and oil districts in the United States, made during the last ten years

Underland : a deep time journey

Geology

The voyage of the Beagle

Outstanding scenic geological features of Pennsylvania

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!

Prehistoric world

Inside the earth

Roadside geology of Pennsylvania

Geology the study of rocks

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

Discovery Channel rocks & minerals : an explore your world handbook

One strange rock

The geology of Centre County

The ends of the world : volcanic apocalypses, lethal oceans, and our quest to understand Earth's past mass extinctions

Things I learned from knitting-- whether I wanted to or not