Tos
OLIGOCENE SEDIMENTARY ROCKS
volcaniclastic
sandstone
shale, conglomerate
limestone, siltstone, tuff, interbedded volcanic rocks, gravel
2.1.3
shale
conglomerate
Eocene
Oligocene
55
24
Northwest:  includes Duchesne River Fm (sandstone and shale; includes some rocks of Eocene age) and Bishop Conglomerate near Utah border.  South-central:  includes Florissant Lake Beds (tuffaceous shale and tuff) and Antero Fm (limestone tuff, tuffaceous
ABW
Explanation of map units shows all Tos as Oligocene, yet explanation in text says some rocks of Eocene age are included in the northwest
T
mixed seds