444 



AV. J. MILLER ADIRONDACK AXORTHOSITE 



small inclusions of AYhiteface anorthosite whose borders against the sve- 

 nitic looking rock are by no means sharp. Apparently qnartz syenite or 

 granite magma rising through anorthosite assimilated some of it and 

 then, rising still higher, caught up numerous small fragments which were 

 not completely digested. 



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Figure 2. — Relations of Keene Gneiss to other Rocks on the southern Brow of Co'b'ble 

 Hill, in the Schroon Lake Quadrangle 



Dimensions, 30 by 30 feet. K = Keene gneiss, W = Whiiteface anorthosite, FG = 

 higtily foliated granite with garnets, and G = typical moderately foliated granite. Not 

 very sharp contacts between K and W and between K and FG. G grades perfectly into 

 FG. 



By the trail, 2 miles northeast of Bailey Pond, there is a large outcrop 

 of peculiar variable rock. There are some small patches of Whiteface 

 anorthosite embedded, but most of the rock looks like granite or granitic 

 syenite with scattering bluish gray labradorites up to an inch long. This 

 latter looks very much like the Cobble Hill rock above described, except 



