Earthsteps A Rock's Journey through Time

This engaging and educational picture book takes readers on one rock's geological odyssey through time. Gorgeous, full-color illustrations and a detailed timeline of a rock's journey teaches students about earth science and the geologic cycle. Also includes a glossary of geologic terms.Diane Nelson Spickert was an exploration geologist with a major oil company for more than twenty years and a field trip leader at Dinosaur Ridge in Morrison, Colorado.Marianne D. Wallace is a natural science educator, writer, and illustrator. Her work has appeared in more than thirty books and publications, including the award-winning America's Ecosystems series.

Diane Nelson Spickert has been a geologist for more than 20 years. She has enjoyed volunteering as a guide for Dinosaur Ridge in Morrison, Colorado, and teaching geology at local elementary schools. Marianne D. Wallace is a natural science illustrator and writer whose work has appeared in over 30 books and publications. She has also been an elementary school science teacher, a botanic garden tour guide, and a writer for the US Forest Service. She lives in the foothills of Southern California.