The definitive resource for Geochemistry

Authoritative online introduction to a wide variety of topics related to earth and environmental sciences.

Five-volume reference work that covers all aspects of geology including earth history, earth materials, surface processes, regional geology, economic geology, engineering geology, petroleum geology, geochemical and mineral exploration, and the history of geology.

Series of encyclopedias covering a wide range of earth sciences topics including climate, mineralogy, paleontology, soil science, stratigraphy, and many other topics.