334 
The American Geologist. 
May, 1893 
and all available information has been placed by biro in the hands 
of the writer. 
The occurrence of a band of "greensand," composed of the 
casts of foraminifera in glauconite, at the base of the Benton 
formation, is an interesting new feature in the geolog}' of the west- 
ern Cretaceous. 
The following is a s3'nopsis of the log as at present determined: — 
HiGHT OF Surface ix Feet above Sea Level, 1,644. 
DESCRIPTIOX. 
Black soil 
Clay, with some small ) 
pebbles [ 
Hard blue clay, withpeb- i 
bles S 
Fine black sand and gravel 
Light blue-grey shale 
Black sand, with water. . . . 
Blue shale 
Soapstone, with thin lay- \ 
ers of lime rock \ 
Blue clay, with round ) 
"/)0M/(7crs" > 
Dark blue-grey shale 
Grey shale 
Mottled grey calcareous \ 
shale f 
Dark non-calcareous, or 
but very slightly cal- 
careous, shale 
Grey calcareous shale 
Dark non-calcareous shale. 
Dark greenish-grey shale '\ 
with many casts of for- >- 
aminiferain glauconite ) 
Sandstone with rounded ] 
grains S 
Thick- 
ness of 
layer in 
feet. 
Depth 
of bot- 
tom of 
layer 
from 
surface. 
Might in 
Feet 
above 
Sea. 
3 
3 
1641 
30.5 
33.5 
1610.5 
56.5 
90 
1554 
4 
94 
1550 
56 
150 
1494 
.5 
150.5 
1493.5 
235.5 
386 
1258 
401 
787 
857 
188 
975 
669 1 
75 
10.50 
594 
25 
1075 
569 
200 
1375 
369 : 
135 
1410 
234 
185 
1595 
1 
49 : 
215 
1810 
-166 5 
25 
1835 
-191 
108 
1943 
— 299 
FORMATION. 
I Pleistocene. 
I 91 feet. 
J 
J Pierre. 
\ (Odanah series.) 
' 292 feet. 
Pierre. 
! (Millwood 
(' series.) 
664 feet. 
! Niobrara. 
( 545 feet. 
Benton. 
f 240 feet. 
J 
\ Dakota. 
f 108+feet. 
Nos. 1 and 2. — These are not improbabl}' stratified deposits laid 
down in the bottom of the postglacial lake Souris, which stretched 
northward from Turtle mountain and covered the country for many 
miles around Deloraine. Near the foot of the mountain the land 
in places becomes gravelly, and occasional!}' a few boulders are 
scattered over it. A couple of miles south of Deloraine the sur- 
face rises in an easy slope for about fift}' feet to a wide, even tei'- 
race that runs back to the base of the higher and rougher portion 
of the mountain. It clearly represents one of the shore terraces of 
