These data include rock and/or sediment geochemistry from samples collected by IGS geologists and retired geologists. Also present are rock geochemical analyses by retired USGS geologists.
IGS/USGS Rock and Sediment Geochemistry
Much of this information has been transfered from paper to electronic format, then tied to location data so that it is usable by the people who want the information. A new Geochemical database and web application was developed in 2015 to assist with delivery from the IGS website.