Figure 1: REE abundances in the original rock.
From: Ecosystem Composition Controls the Fate of Rare Earth Elements during Incipient Soil Genesis
(A) REE concentrations in bulk rocks. (B) The concentration of REE in the initial rock substrates normalized to Earth’s upper continental crust average33. Values above unity represent enrichment, while those below, represent depletion. Tetrad groups (except Y) are separated by vertical dashed lines. Elements are arranged by increasing atomic number, with those defined as low (L), medium (M) and heavy (H) atomic mass displayed on X axis with light, medium and dark gray background, respectively.
