140 
The American Geologist. 
March, ISKH) 
34 
1 106 
Sample composed largely 
of grains of white quartz 
sand. Slight efferves- 
cence in cold HCl, which 
is slightly stronger on 
heating. 
35 
1 1 10 
Mainly light gray quartz 
sand which is not so 
white as No. 34. 
36 
1123 
Mainly white quartz sand. 
"Salt water." 
37 
1 135 
Dark gray limestonewhich 
38 
39 
40 
1155 
1260 
1275 
effervesces moderately 
in cold HCL and strong- 
ly on heating. 
Ditto but finer chips. 
Lighter gray limestone 
than No. 37 which scarce- 
ly effervesces at all in 
cold HCL, but strongly 
on heating. 
White quartz sand; no ef- 
fervescence in cold or 
hot HCL. 
41 
1295 
Ditto but sample is badly 
rusted and contains some 
blackish grains. 
42 
1350 
Ditto. Slightly finer grains 
of quartz; a few blackish 
ones. 
43 
1375 
Ditto; a few blackish to 
greenish grains. 
44 
1400 
Ditto with some greenish 
grains. 
45 
1560 
Mainly grains of white 
quartz. Dr. Gill re- 
ported "quartz, feldspar, 
magnetite and weath- 
ered hf^rnblende." 
46 1 561 Ditto, but more of the 
weathered hornblende 
and apparently a few 
flakes of mica. 
Calciferous 
Calciferous 
Calciferous 
Calciferous 
Calciferous 
Calciferous 
Calciferous 
Calciferou 
Calciferous 
Calciferous 
Calciferous 
Archean gneiss 
Archean gneiss 
