1894. | NEW YORK ACADEMY OF SCIENCES. 193 
to mix completely. The contact effects are much more marked 
in respect to the character of the granitic rock here than else- 
where. At no other point have small dykes been seen, nor does 
the granite become finer grained at the edges in other places. 
The pegmatite veins, too, are exceptional. 
The second contact, on the western side of the St. John 
River, stretches from near Pleasant Point, opposite Indiantown, 
to where the intrusion sinks under the overlying drift ; but it is 
by no means as well exposed as the first. Its existence is, per- 
haps, owing to the fault-line along the northern edge of the 
main band, having here departed a little from the contact, and 
occupying the present bed of the St. John River. A narrow 
interrupted strip of sedimentary rocks is thus left along the 
Zoe 
Fia. 3, PYROXENE-GNEISS WITH TITANITE. 
From quartz-diorite contract. Enlarged 45 diam. P—green 
pyroxene ; F—plagioclase feldspar; T=titanite. 
northern side of the intrusion, and is considerably metamor- 
phosed. Massive micaceous and pyroxenic gneisses, which are 
not found elsewhere in the neighborhood, but appear to corres- 
pond with the mica and hornblende schists of the upper Lauren- 
tian, are found in small quantity. In some of these, small 
rounded, spindle-shaped crystals of titanite are quite abundant 
and may be due to contact influence. A figure is given of the 
appearance in thin section of a pyroxenic gneiss from close to 
the granite, chiefly to show the resemblance between this ex- 
treme phase of our contact-metamorphism and the extreme 
regional metamorphism as seen in the Adirondack gneisses, 
TRANSACTIONS N. Y. AvaD. Sct., Vol. XIII., Sig. 13, June 21, 1894. 
