Studies on water movements and sediments in Southern Lake Michigan : part 1[-3] ... / by John C. Ayers.

Line XXIII; bearing 750 frc
Chicago Harbor
Miles
Sample from Depth
No. Breakwater (feet)
1 1 38
2 2 45
3 3 46
4 4 47
5 5 58

)m N.E. corner outer breakwater,

6
7
8

6
7
8

9
10
11
12
13
14
15

9
10
12
14
16
18
20

67
67
67
80
88
109
126
139
152
166

______ Description
Coarse sand, gravel
Medium-fine sand
Gravel, over gray clay
Medium-fine sand
Very coarse sand, gravel, pieces of
ceramic tile
Gravel, cinders, rusty nails; over
stiff gray clay
Medium sand with few cinders
Sand and pebbles over stiff gray
clay
Medium-coarse sand
Gravel over soft grayish-brown clay
Medium-fine sand
Medium-fine sand
Coarse sand and gravel
Coarse sand and gravel
Brown slightly-silty fine sand

23A