366 The American Geologist. Docuinber, 1895 
From its position, immediately underlying the ( -hampion 
bed, a terrane cliarged with an essentially Fredericksburg 
fauna, it seems, on the other hand, impossible to assign the 
( 'heyenne sandstone to a period later than the F'redericksburg. 
THE CORRAL SANDSTONE. 
Th(! Corral sa ndsfoiie is SO named from haA'ing a consider- 
able portion of its thickness exposed in the walls of the 
" Natural corral." The latter is a short box caiion on the 
Lanphier claim in the southeastern corner of Kiowa county, 
and has been known under this name by the settlers of this 
and adjoining counties for many years. It is about thirtj" 
feet deej) aiid not only has vertical lateral walls but is also 
abruptly closed'by an equality precipitous head-wall. It has 
at various times been used as an enclosiire for holding stock; 
and at the time of the writer's most recent visit to it (in 
August last) the posts of a fence that had closed the lower 
end of it were still standing. 
The thickness of the ( Corral sandstone is ordinarily thirty 
to fifty feet. The lower portion of it is white, but the upper 
is often beautifully variegated with A'arious bright reds 
mingled with yellow, pur])le and lirown, as at and near the 
Hell's Half Acre and on the iieads of certain south branches 
of South Elk creek. 
The "Chimney rock" and the row of six small pillars 
which the writer has called (for lack of any other name) the 
Ghejienne Brof/ier,s, a short distance down the ravine from 
Hell's Half Acre, have ])een carved oat of the lower part of 
this sandstone by erosion. The main part of the once much 
more prominent Osage rock (foi-merly called by some the 
Cheyenne rock), whi(di marks the Cheyenne-Osage battle of 
the latter ])art of the sixties, is of this sandstone. 
The summit of the Corral sandstone is frequently somewhat 
more indurated than tlie rest and tends to form a platform at 
the base of the softer Lani)hier exposures. 
THE ELK CREEK BEDS. 
The ])()rtioii of the Cheyenne sandstone situated above the 
Corral zone may be named the J^Ik Greek beds, from Elk creek, 
on the heads of which it is finely displayed. These beds are 
for the most part shaly as well as arenaceous and very varia- 
