Multiple on-line chemical databases, including summary data on the geochemistry of all reservoirs in the Earth, partition coefficient data for all types of rocks and minerals and for every element, and a petrologic and chemical database of seafloor samples from a variety of tectonic environments. Also includes on-line modeling software, and a schedule of presentations and workshops by organization staff.

Two downloadable databases, provided by the International Union of Geological Sciences. The igneous database can be downloaded in ASCII form or as a Microsoft Access database; the sedimentary database can be downloaded only in Microsoft Access form. Both databases can also be accessed on-line via browser.

Chemical compositions of glassy rinds from deep-sea volcanic samples in the Smithsonian Institution Sea-Floor Rock Collection. Presented as two large on-line comma-delineated text files.

Collections of analyses from the British Columbia Geological Survey, including geochemical data from lake sediment, till, and regional surveys.

Geochemical data from more than 30,000 ocean floor core samples around the world. On-line queries can be made by specifying location, expedition/cruise, sample characteristics, literature reference, or sought chemical value(s).

GEOROC (GEOchemistry of Rocks of the Oceans and Continents) is a searchable collection of more than 50,000 analyses from different tectonic settings. Queries can be made based on bibliography, tectonic setting, geography, chemistry, and petrography.

A computerized bibliography and geochemical database on offshore marine mineral deposits. Primarily contains chemical analyses of present-day marine deposits of ferromanganese nodules and crusts (more than 140,000 analyses), but also includes some data for heavy minerals (approximately 1400 analyses). Analyses can be downloaded from the website or ordered on a CD.