Up for sale is this leaf fossil in matrix. Small branch sections also visible. The matrix could be split again length-wise with a metal wedge to possibly reveal additional fossils. Mudflows and stream deposits of the Clarno Formation, 57-35 million years old, yield fossil leaves of subtropical plants. Some of the most common fossil found in the mudflow deposits are simply casts of branches or limbs caught in fast-moving mudflows. In places where quieted waters prevailed, (lakes, ponds, and sluggish streams) common fossils include magnolia leaves, palm fronds and walnuts and walnut leaves. This fossil appears to be Salix dayana n. sp.( an ancient type of willow). The specimen measures 7? x 4? x ? and weighs 1 lb 6 oz. Thank you for looking