Additional [email protected] Resources

[email protected] Science Road Trip

Follow Professor Gilbert D. Snail on his tour of the Earth science of the United States.


Crawl along with Gilbert
Graphic for Science Road Trip featuring Gilbert D. Snail, a snail with a paleontologist hat and with a suitcase. Speech bubble from Gilbert reads: According to the map, we’ve only traveled four inches.

Fossils of the United States

Find out more about the fossils that have been found near where you live or places that you have visited.


Dig in!
Photograph of a trilobite fossil.

Quick Guides to Earth Science


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Photograph of Devonian sedimentary rock layers.

Frequently Asked Questions (FAQs) about Earth Science


Find Answers
Photograph of the Grand Canyon in Arizona.

United States Earth Science Quick Facts

Find out about the official state fossils, rocks, minerals, and gems of each U.S. state, as well as the highest and lowest points of elevation and places to visit. Geologic and topographic maps for each state are also available. This resource is under development, with more states being added regularly.


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Photograph of a rocky beach in Door County, Wisconsin.

Geologic Time Scale

The geologic time scale and important life and Earth history events of the past.


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Image showing the geologic time scale, including a pie chart that depicts the relative proportions of time represented by each geologic eon.

Geologic Maps of the United States

Newly developed, simple geologic maps for each state in the country. This resources is under development, with more states being added regularly.


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Geologic map of the United States.

Topographic Maps of the United States

Newly developed topographic maps for each state in the country. This resources is under development, with more states being added regularly.


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Image showing the topography of the southwestern United States with a zoomed-in inset of the Grand Canyon.