upper Ordovician at Vevay, Ind. — Cumings. 381 
VEVAY SECTION (Numbers Refer to Zones.)— Continued. 
33 35 37 
39 
41 
4-5 4-9 
51 
1 1 1 1 1 
53 1 55 59 1 61 1 63 1 65 1 73 
1 1 1 1 1 
83 
a 
b 
c 
d 
e 
f g 
h 
. . .1. . . . 
....;.... - - 1 . . - - 
... .1 ... .1 ... .1 1 X 1 1 
X 
X 
X 
X 
X 
X 
X 
X 
X 
: : ! : : 
X 
:;::i:::: 
....!.... 
i.... X r. ••• 
1 .... 1 .... 1 X 
T 

1 .... 1 .... 1 .... 1 ... . 
X 
X 
X 
.... 1 ... . 
j 
1 . . . . X j . . . . 
1 
. . 1 . . 
1 
.... 1 1 .... 1 .... 1 ... . 

.... 1 ... . 
.... 1 1 .... 1 .... 1 ... . 
— 
— 
— 
....!.... 
.... 1 1 .... 1 .... i ... . 
.... i .... 1 .... 1 .... 1 .... 1 ... . 
T 
. . X 
.... 1 .... 1 .... 1 .... 1 .... 1 ... . 
.... 1 ... . 
.... 1 .... 1 .... 1 .... 1 .... 1 ... . 
1 . . 
. . . . 
.... 1 ... . 
X 
.... 
.... X 
.... i .... 1 .... 1 .... 1 .... 1 ... . 
X 
.... 1 ... . 
.... 1 .... 1 .... 1 .... 1 .... 1 ... . 
.... 

.... 1 .... 1 ... .I .... 1 ... .I ... . 
... 1 
. . ■. . 1 . . . . 1 . . . . 1 . . . . ! . . . . i . . . . 
.... 
::::(.... 
. . 1 - - 
.... 
.... i ... . 
.... 
.... 1 .... 1 .... 1 .... 1 .... 1 ... . 
.... 
. . . .I . . . . I. . . . 
.... 
X 
X 
.... 
.... 1 .... 1 ... . 
. . 1 . . . . 
.... 1 .... 1 .... 1 .... 1 .... 1 ... . 
.... 1 ... . 
.... 
.... 1 .... 1 .... 1 .... 1 .... i ... . 
X 
X 
.... 1 ... . 
.... 
.... 1 .... 1 .... 1 .... 1 .... 1 ... . 
...| 
1 
.... 
.... 
i....i....i....i....i.... 
X 
..l.. 
of water at the shore is thirty-seven feet ; and at the lake 
end, fifty-seven feet. The tunnel is nine feet in diameter 
in the clear, and is lined throughout with three courses of 
brick. Two temporary cribs were sunk in the lake over 
tlie line of the tunnel to facilitate the construction, the work 
progressing in each direction from the cribs and from the 
shore. 
The construction of this tunnel was begun in October, 
1896, and it is expected to be completed about a year from 
the present time. Its capacity will be 175,000,000 gallons 
in twenty-four hours. 
The Geological Fe.^tures. 
The entire length of the tunnel has been in a sedimentary 
deposit of very fine stratified blue clay. This seems to bo of 
similar formation to the clay forming the blufifs along lake 
Erie, and which has been named by Newberry the Erie blue 
clay. In the workings of the tunnel this clay has been found 
to be stratified throughout by innumerable very thin strata 
of dry quicksand. While the entire deposit is built up of 
alternating strata of quicksand and clay, yet there are some 
strata more distinctly defined than others. The strata of 
clay vary in thickness ; but what appear to be the best de- 
