SIGIDIUBS JON) Wels SOLGAOUISID IPOS NISIINUG (GaN aISs: 
OF NEW HAMPSHIRE. II. 
Contact Metamorphism.— The endomorphic changes wrought 
by the granite intrusions are relatively slight. Thus the biotite- 
gneiss and hornblende-gneiss southwest of Lake Wakawan have 
the same mineralogical composition at the contact as they have 
a quarter of a mile away from it along the strike. On Spindle 
Point, gneisses of like nature show the only exomorphic change 
discovered throughout the whole terrane of the Lake Winnipi- 
seogee gneiss. Yet even this is a doubtful case, since the only 
evidence is the presence of some sillimanite needles and a few 
garnets in the schist near the granite. Again, the interbedded 
biotite-gneiss, muscovite-biotite-gneiss, and actinolite-gneiss, at 
the outlet of Little Squam Lake, are practically unaffected by 
the granite. The same is true of the large biotite-gneiss-inclu- 
sion on the north side of Beech Hill, as well as of the whole 
contact-line of the Montalban group. 
The schists on Saddle Hill exhibit the best metamorphic belt 
which appears in the Winnipiseogee area. Specimens of the 
country-rock were taken at localities from one to eight hundred 
feet from the contact, and in all of them the country-rock proves 
to be a typical muscovite-biotite-schist with accessory sillimanite 
in long needles. Inside that zone toward the granite, however, 
a pronounced metamorphic aureole encloses phases of the ter- 
rane which represent important modifications of the schist. One 
of them, some eighty feet from the contact, is a hornfels largely 
made up of zoisite and andalusite (?) with quartz and magnetite. 
Another, four feet from the granite, is a compact mica-schist 
richly charged with garnets; while within five inches of the 
contact this garnetiferous schist has absorbed a large amount of 
orthoclase and plagioclase which seem to have been derived 
from the neighboring granite. 
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