Stratigraphy and palynology of the Upper Lewis Shale, Pictured Cliffs Sandstone and Lower Fruitland Formation (Upper Cretaceous) near Durango, Colorado.
Reference:
Manfrino,C. (1984)
Stratigraphy and palynology of the Upper Lewis Shale, Pictured Cliffs Sandstone and Lower Fruitland Formation (Upper Cretaceous) near Durango, Colorado. Geological Society of America, Abstracts with Program, Annual Meeting
Vol. 16 # 4 P. 246- 246