1. The Brontothere fossils occurred as float on poorly consolidat­ ed, reddish brown sandstone that direcdy overlies what paleobot-anists refer to as the "RST" coal zone (Basinger, personal com­ mun., 1997), equivalent to the coal seam at the 42 m level on Ricketts' (1991) measured section 28-85 (Ricketts, personal com­ mun