IGNEOUS AND CRYSTALLINE ROCKS. 29 
A B. Cc D 
SEC ha ws actnan we hits miata eh ea tancenar Gre Heian each Pankow NENA PONE 61.36 | 53.56 | 40.71 54.68 
RIG cy oa x cso ty eps avd onab milan te fasts inne atin nok he 16.25 | 24.43 | 19.46 21.63 
FO Sees een cand marci saacin pe comedian dias aimacaynn caine seindsemiamtaieieinin ae wilidaancion 2.14 2.19 7.46 2.22 
TOI oe setts 8 $e Waa isn 3 aes al rcveantene @ohdesdyaecceabrintv ne, Sin Sead amma cernld ou kiocweseominadek 8.24 1,22 6. 83 2.00 
MgO 7.97 31 6.21 1.25 
CaO 10. 27 1,24 | 11.83 2. 86 
NaaO 1.54 6. 48 1.80 7.03 
a eote: 1.06 9. 50 3. 26 4. a 
eget) Se ee oc . . 
H20 above 100°......... nates ee Wienges PERE } 1.33 i 98 li 1.53 
Rocks E to J collected by W. 8. Bayley, who describes E, F, Gin Folio 167. Analy- 
ses by W. T. Schaller, record Nos. 2252, 2255. 
E. Pochuck gneiss, Greenwood Lake quadrangle. Contains oligoclase, ortho- 
clase, diopside, hornblende, hypersthene, biotite, magnetite, and quartz. 
F. Byram gneiss, 1 mile west of Hibernia. Contains potash feldspars (micro- 
perthite), but less hornblendic and pyroxenic minerals than the Pochuck gneiss. 
G. Losee gneiss, northeast of Berkshire Valley, Lake Hopatcong quadrangle. 
Contains plagioclase, quartz, diopside, hypersthene, biotite, apatite, magnetite, 
zircon, and titanite. 
H. Augitic Losee granite, Lake Hopatcong quadrangle. 
I. Intermediate gneiss, Oxford tunnel, Hackettstown quadrangle. 
J. Micaceous Oxford gneiss, Oxford tunnel. 
K. Quartz-orthoclase-augite rock, near Marion Station, Jersey City. Collected by 
J. Volney Lewis. Analysis by Schaller, record No. 2261. 
100.36 | 99.54 | 100.62 | 100.12 | 100.62 | 99.84 99.97 
PENNSYLVANIA. 
A. Aporhyolite, Monterey, Franklin County. Kallerudose. Described by Flor- 
ence Bascom in Bull. 150, p. 343. Contains alkali feldspar, quartz, sericite, epidote, 
titaniferous magnetite, leucoxene, and rarely sphene. Analysis by H. N. Stokes, 
record No. 1479. P. R. C. 136. 
