156 The American Geologist. March, i9uo 
SECTION OF THE AUBURN WELL. 
NO. OF DEPTH 
SAMPLE IN FEET DESCRIPTION OF SAMPLE FORMATION 
2 535 Gray marl mixed with 
rather fine black chips 
which seem to have fallen 
in the well. Salina 
3 650 Green argillaceous shale, 
which is only slightly cal- 
careous. Also chips of 
selenite and massive gyp- 
sum. Salina 
4 750 Grayish marl with some 
chips of greenish color. 
Quite strong efferves- 
cence in cold HCl. Salina 
5 800 Red argillaceous shale. Salina 
6 1,000 Slightly greenish argilla- 
ceous shale which effer- 
vesces slightly in cold 
HCl., and more strongly 
on heating. Salina 
7 1,025 Slightly bluish-gray argilla- 
ceous shale which effer- 
vesces quite strongly in 
cold HCl. Salina 
8 1,055 Very dark gray, almost 
black limestone, which 
effervesces strongly in 
cold HCl. Chips rather 
small apparently from a 
massive limestone. Niagara 
9 1,155 Ditto. The larger chips 
show white specks of cal- 
cite causing the rock to 
glisten in the bright sun- 
light. Niagara 
10 1,175 Grayish argillaceous shale 
which effervesces some- 
what in cold HCl. Clay 
predominates. Niagara 
11 1,210 Gray limestone effervescing 
strongly in cold HCl. Niagara 
12 1,290 Fairly dark gray massive 
limestone which effer- 
vesces strongly in cold 
HCl. Fragments of fos- 
sils. Niagara 
