Locality 50 - Section 1, southwest face at tip
of butte, toe of spur.
Elk Butte (in part)
Base of slope
(1) 22.8 Shale, gray, silty, blocky fracture to
platy, brown Fe stain on fracture
surfaces. Weathers to tiny light gray
shale chips. Noncalcareous, gypsum xls.
Upper foot reversible, mottled lighter and
darker gray with few jarosite splotches.-
gradetion into interval above
Trail City
(2) 1.6 Shale, silty, mottled light and dark gray
and jarositic yellow, with heaviest
concentration of jarosite in upper half.
(3) 2.0 Shale, as above in (2), scattered jarosite
blotches and heavy concentration of
jarosite in upper 0.5 ft. Upper half
of interval contains scattered concretions -
fleltened ovoid up to 1' thick; silty,
commonly punky gray limestone cores
and thick light gray-weather rinds
which are highly silty and show lamination
and cross-lamination. Cores weather,
with light reddish stain; are barren
in this locality.
(4) 6.7 Clay, silty, gray, semiplastic with
irregular laminac and pods of silt.
37.