148 
Tlic American Geologist. 
March, 1901) 
26 1,633 Light gray limestone which 
effervesces very strongly 
in cold HCl. Rather fine Trenton 
chips. limestone 
27 1,670 Dark bluish-gray lime- 
stone; some of the chips 
are quite large and show 
fragments of Trenton fos- Trenton 
sils. limestone 
28 1,760 Ditto, but part of the chips 
are of a slightly gray col- 
or and effervesce very 
strongly in cold HCl. Trenton 
Fragments of fossils. limestone 
2Q 1,840 Very dark gray to almost 
blackish limestone; a few 
light gray chips. Strong 
effervescence in cold Trenton 
HCl. limestone 
30 1,880 Light and dark gray lime- 
stone effervescing strong- 
ly in cold HCl. Some of 
the chips are drab in col- Trenton 
or. limestone 
31 1,950 Light gray limestone which 
effervesces strongly in 
cold HCL, and more on 
heating leaving a consid- 
erable residue of quartz 
grains. This is apparent- 
ly the top of the Calcifer- 
ous sandrock. In the 
bright sunlight the quartz 
grains glisten and this 
sample is like the one 
from the Rome well at 
1,085 which I called the 
top of the Calciferous; 
though a lighter gray but 
not so light as the one 
from 1,095 in that well. Calciferous 
\2 10685^2 Bottom of well. 
