NUGGET SANDSTONE
  Thrust belt--Buff to pink crossbedded well-sized and well-sorted quartz sandstone and quartz-
     ite; locally has oil and copper-silver-zinc mineralization.  J@n, J@nd
  North Wyoming--Gray to dull-red crossbedded quartz sandstone.  K@, J@n, J@, J@gn, J@nd,
     J@gc
  South Wyoming--Gray to dull-red massive to coarsely crossbedded quartz sandstone.  MzPz