A GEOROC (http://georoc.mpch-mainz.gwdg.de/georoc/) compilation of 8,531 analyses of SiO2, Rb and Sr concentrations, in crustal rocks sampled in central and southwestern America, at sites of various crustal thickness. These data were used in Dhuime et al. (2015, Nature Geoscience 8, 552-555) to establish a positive correlation between Rb/Sr (or SiO2) and crustal thickness in sites of generation of new continental crust. GEOROC - Geochemistry of Rocks of the Oceans and Continents

A worldwide compilation of 14,261 analyses of Nd, Sm, Rb and Sr concentrations, and Nd and Sr isotopes, in crustal rocks with a range of crystallisation ages. These data were used in Dhuime et al. (2015, Nature Geoscience 8, 552-555) to calculate the variation in the 'time integrated' Rb/Sr ratios of the new (i.e. juvenile) continental crust as a function of its Nd model age of formation.

This dataset represents the first publication of complete national maps from the Geochemical Baseline Survey of the Environment (G-BASE) and TellusNI projects, whose aim was to conduct a national geochemical survey of the United Kingdom in order to improve understanding of our geology and environment and provide quantitative evidence against which to gauge future environmental change. This dataset consists of a series of interpolated raster (ASCII grid) maps displaying the concentrations of a suite of chemical elements (and oxides) in the stream sediments of the United Kingdom. The chemical elements are as follows: Arsenic, Barium, Calcium (CaO), Chromium, Cobalt, Copper, Iron (Fe2O3), Lanthanum, Lead, Magnesium (MgO), Manganese (MnO), Nickel, Potassium (K2O), Rubidium, Uranium, Vanadium, Zinc and Zirconium.