yeas DEAN E. WINCHESTER 
at no point along its outcrop does the bed show a dip of more than 
r°, the maximum inclination of lignite beds of the region, although 
it is known to outcrop in a canyon north as well as in one south of 
the high point in which the White River beds show apparent dips 
of about 30° to the southwest. 
On all sides of the Slim Buttes there are large areas of slumped 
rocks where the attitude of the included beds seems to agree with the 
apparent dips exhibited in the White River beds which are known 
Fic. 4.—Rocky Point, one mile south of Old L Ranch. Height of cross-bedded 
portion about too feet. 
to be in place, and it is probable that these slumped rocks have 
been seen by former geologists and used to substantiate the apparent 
structure described. One large area of the White River forma- 
tion, which might easily be used in this respect, is to be found at 
the north end of the Slim Buttes where sandstone and clay about 
125 feet in total thickness, one-half mile in length, and 500 feet in 
width, occur as a huge landslide now occupying the bottom of a 
narrow valley. The beds in this block dip ro to 15° but there is 
little doubt that the whole mass has moved a considerable distance 
horizontally, as well as at least too feet vertically, from its former 
position. However, at each of the three localities above described, 
the cross-bedded White River formation is exposed in the face of 
