Geosciences

Collection of various USGS datasets ranging from regional geology, geochemical, geophysical, etc.

Provides access to geochemical and other rock sample data.

An integrated database of Raman spectra, X-ray diffraction and chemistry data for minerals. Also includes selected full-text articles from Zeitschrift fur Kristallographie and many other chemistry and mineralogy journals.

Database that includes every structure published in the American Mineralogist, The Canadian Mineralogist, European Journal of Mineralogy and Physics and Chemistry of Minerals, as well as selected datasets from other journals.

x-ray diffraction data for minerals.

Large mineral database including technical data, localities, and photographs.

A catalog of data from the U.S. Geological Survey.

NCEI hosts comprehensive oceanic, atmospheric, and geophysical data sets.

OneGeology is an international initiative of the world's geological surveys to provide a portal to open data sets

Federated search site to find and connect earth science data.

OpenGeoSci is a free, public map based toolset that allows users to search for data.

Tool to locate data repositories,

Index to geologic mapping in the United States. Some full text links.

The U.S. Geological Survey is a major publisher of geologic maps, primarily of the United States.