8/11/99 Notes of observations & Thoughts on loc 9918 This loc. appears to represent a sequence of Tuff beds alternation w/ non-volcaniclastic intervals that allowed plant colonization to take place. The floras here may represent a series of carly successional firm and later angiosperm dominated floras that colonized the bare substrate, grew for a while and were then destroyed by a successing tuffaceous event. The light grey tufts frequently show lamination and are barren of plant fossils except toward their bases where the plant matter is commutted and sometimes appears charred or burned. Following this the upper 10-40 cm at a Tuff