Tellus Sediments Stream sediments The G-Base samples (1994-1996) were analysed by XRF for Ag, As, Ba, Bi, CaO, Cd, Ce, Co, Cr, Cs, Cu, Fe, Ga, K2O, La, MnO, Mo, Nb, Ni, P2O5, Pb, Rb, Sb, Se, Sn, Sr, Th, TiO2, U, V, W, Y, Zn, Zr. Au, Pt and Pd were analysed by 10g Fire Assay. B was also analysed. The Tellus samples (2005-2006) were analysed by XRF for Al2O3, Ag, As, Ba, Bi, Br, CaO, Cd, Ce, Cl, Co, Cr, Cs, Cu, Fe2O3, Ga, Ge, Hf, I, In, K2O, La, MgO, MnO, Mo, Na2O, Nb, Nd, Ni, P2O5, Pb, Rb, S, Sb, Sc, Se, SiO2, Sm, Sn, SO3, Sr, Ta, Te, Th, TiO2, Tl, U, V, W, Y, Yb, Zn, Zr. Au, Pt and Pd were analysed by 10g Fire Assay. B was also analysed. The surveys followed the British Geological Survey's Geochemical Baseline Survey of the Environment (G-BASE) standard developed over many years that defines the specifications for mapping the regional geochemistry of the United Kingdom. For further information visit the Tellus webpages: http://www.bgs.ac.uk/gsni/tellus/