Figure 3: Distribution and images of tree stump and root casts across the forest paleosol horizon at R3.

(a) Detailed map showing distribution of tree stump casts (circles) at R3 site. Diameter of circles is directly proportional to the diameter of the tree stump casts. Stars indicate measured paleosol profiles. Leaf symbols represent quarries where fossil leaves were excavated from superjacent sandstone horizon. Box indicates the location of the calcite-cemented root casts, tree stump casts and palaeosol excavated and illustrated in b. (b) Drawing depicting spatial relationship of one tree stump cast (TS) and root complex. (c) Close-up photograph of an excavated root showing branching behavior (15 cm scale). (d) Photograph of excavated tree stump cast (yellow) directly overlain by fossil leaf layer (green) (15 cm scale). (e) Thin-section photomicrographs of one small root cast (plane-polarized light). Initial root morphology affected preservation, manifested by dark band (xylem) and relict interior cell (phloem) structure (scale bar: 1 cm).