Gas-Well Sections in Cefitral Neiv York. — Prosser. 141 
47 1562 Plenty of small flakes of 
mica with grains of 
quartz and feldspar like 
the schists at the top of 
the Archean in the Mo- 
hawk Valley. Prof. 
Kemp reported "quartz, 
microcline, orthoclase, 
biotite, magnetite, and 
green pyroxene. Clear- 
ly a granitic gneiss." Archean gneiss 
48 1575 Prof. Kemp reported 
"quartz, orthoclase, some 
magnetite, and almost no 
dark silicates, sample 
practically like the last. 
one with the exceptions 
noted." Archean gneiss 
49 1581 Ditto but with smaller 
quantity of hornblende. Archean gneiss 
50 1583 Ditto, but very badly 
rusted. Archean gneiss 
51 1 585- 1 597 Prof. Kemp reported 
"much biotite, and dark 
green hornblende, com- 
paratively little feldspar 
or quartz. Evidently a 
dark basic streak in an 
otherwise granitic gne- 
iss." Archean gneiss 
52 1602 Prof. Kemp reported 
"quartz, orthoclase, plag- 
ioclase, magnetite, a little 
green pyroxene, some 
brown biotite." Archean gneiss 
53 161 8 Composed princii^ally of 
grains of white quartz, 
some feldspar, with 
flakes of mica and' 
grains of h()rn!)lende (?) Archean gneiss 
