Around McLean there is a large district which is copiously fur-
nished with springs of pure sparkling water. These issue at the
contact of the drift with the underlying Niobrara, which is hard
and compact, being impervious to the water which sweeps along the
upper surface of the gently eastward sloping Niobrara.
Outcrop on Little Pembina river in the southwest quarter of
section 3, T. 162, R. 57.
Feet. Inches.
6. Gravel and quite large glacial boulders 20

5. Clay band, yellow 2

4. Shale , calcareous , "cement rock" 15

3. Clay seam, yellow 6

2. Shale, calcareous, "cement rock" 80

1. Unexposed 40

This section occurs on the east bank of the Little Pembina and
is thought to be a part of the Pembina delta. The delta deposit,
however, is very thin here in comparison with its thickness farther
east. The delta ends toward the east in a high steep bluff locally
known as the first mountain.
Outcrop on the Little Pembina in the northwest quarter of
section 10, T. 162. R. 5T.
Feet. Inches.
8. Unexposed to top, gravel and sand

7. Clay bands, yellow and black 5

6. Clay band, black 9

5. Clay band , yellow 2

4. Shale, calcareous, "cement rock" 15

a Clay scam, yellow 6

2. Shale, calcareous, "cement rock" 75

1. Unexposed 35



STATE OF NORTH DAKOTA



Feet.
6. Gay bands, yellow and black, much weathered

and exposed under "the overlying black loam .... 3

5. Shale , calcareous , "cement rock" 15

4. Clay seam , yellow -.
3. Shale, calcareous, "cement rock" VA

2. Clay seam , vellow

1. Shale, calcareous, "cement rock" 85

Section on Little Pembina in the southwest quarter of se^
T. 162, R. 57.
Feet.
