RAYMOND: CORRELATION OF THE ORDOVICIAN STRATA. 279 
in hollows in the sandstone below and the strata bend up 
and down with the irregularities of the subjacent sur- 
face. At the base is a bed of limonite two to three inches - 
in thickness. 18 to 13 ft. = 36 ft. 
Thick, irregularly cross-bedded sandstone with some 
specimens of Obolus in the upper layer. Thickness 
variable. 5 to 10 ft. = 23 ft. 
Thin strata of black shale alternating with layers of 
yellow or red sandstone. The shale is in beds one to ten 
inches thi¢k and is similar in character to that above. 
The basal portion consists of conglomerate with boulders 
of sandstone from one to five feet in diameter, and also 
small pebbles cemented together by limonite and pyrite. 
“ohne 5 ft. = 13 ft. 
Zones 2 to 4 represent the Packerort formation. 
Hard, white, coarse-grained sandstone. Base not seen. 
Top of Esthonia formation. 8 ft. = 8 ft. 
