Pedogenic and geochemical processes of ultramafic soils along a climatic gradient in southwestern British Columbia

british columbia chrome chromium climatic factors cobalt cobalto colombie britannique cromo facteur climatique fer geochemistry geochimie hierro iron magnesio magnesium manganese manganeso minerales minerals nickel pedogenese procesos de transporte en el suelo roca roche rock soil formation soil genesis soil transport processes transformation transport dans le sol weathering