GRANITE ~GNETSS IN CONNECTICUT 651 
At several localities the granulite can be followed from the 
contact and can be seen to pass gradually into the ordinary 
granite-gneiss. The changes on passing from the contact are as 
follows: (1) The rock becomes coarser, loses its granulitic 
structure and assumes a granitic structure. (2) The garnet dis- 
appears, biotite becomes abundant and is accompanied by the 
ordinary accessories of the granite-gneiss, titanite, magnetite and 
apatite. (3) Small grains of granophyre and microperthite 
Fic. 4. Granulite (X18). 
appear. These are common among the feldspars of the granite, 
but are wholly lacking in the granulite. Of these characters the 
granulitic structure and the presence of garnet extend farthest 
from the contact and often at a distance of many yards the 
richly biotitic granite-gneiss becomes garnetiferous and shows a 
decidedly saccharoidal texture. 
Bands of granulite occur interbedded with or cutting across 
the schists near the contact. These bands are often less than an 
inch in thickness, and may connect with the main mass of the 
