EVANSTON FORMATION--Gray siltstone, sparse red sandstone, and lignite beds.  TKe
PINYON CONGLOMERATE--Brown gold-bearing quartzite conglomerate interbedded with 
     brown and gray sandstone.  Age of basal part about 67 Ma in northeastern Jackson Hole;
     farther south entire sequence is Paleocene.  TKp
SEDIMENTARY ROCKS--Northern part of Wind River Basin.  White-weathering oil-stained
     sandstone and brown carbonaceous shale.  TKu
FERRIS FORMATION--Brown and gray sandstone and shale; sparse carbonaceous shale and 
     coal beds; thin lenses of pebble conglomerate.  TKf