42 NEW YORK STATE MUSEUM 



the syenite grades through granitic syenite into granite, but not a 

 single locality was observed where syenite definitely cuts granite 

 or vice versa. The writer has been unable to demonstrate the 

 existence- of any considerable mass of granite either distinctly older 

 or younger than the normal syenite, though small pegmatite and 

 aplite dikes are not uncommon. 



As regards granularity, granulation and foliation the statements 

 above made with reference to the syenite apply almost equally well 

 here. Excessively gneissoid granite with highly flattened quartz 

 and feldspar were observed, among other places, one- fourth of a 

 mile northeast of the summit of Cobble hill, on the southern brow 

 of Bigsby hill, at the summit of Oliver hill, and in the small area 

 of granite just east of the brook near the trail 2 miles northeast of 

 Bailey pond. 



Most of the granite is pinkish gray, to pink, or even reddish 

 where fresh, but locally it is greenish gray or gray. It usually 

 weathers to pinkish gray or light brown. 



Like the syenite, the granite exhibits many local variations. A 

 hand specimen from a ledge by the lake shore one-^fifth of a mile 

 north of the Adirondack village steamer landing is distinctly foli- 

 ated and granulated, with one pink band especially rich in feldspar 

 adjacent to a band very rich in quartz plus some garnets, these two 

 bands having on either side granite consisting of quartz, feldspar, 

 and hornblende with some biotite. These bands are not sharply 

 separated. In the quarry one-half of a mile north of Moxham 

 pond, the granite shows notable variations in coarseness of grain 

 often within a foot or two. 



Table 2 shows the minerals contained in some thin sections of 

 the granite. From this table it is seen that the two most conspicu- 

 ous never failing constituents are microperthite and quartz. In a 

 few slides microcline occurs, and in only two does it equal or 

 exceed the microperthite. Orthoclase usually fails and it is never 

 prominent. 



Granite with scattering garnets was observed in several places as, 

 for example, the whole mass of Pine hill, three-fourths of a mile 

 west-southwest of Taylors on Schroon, on top of Ledge hill, and 

 by the road three- fourths of a mile north-northeast of Pat pond. 



In a number of localities numerous lenslike inclusions of horn- 

 blende gneiss (metagabbro or Grenville), too small to be mapped, 

 occur in the granite as, for example, one-half of a mile west of 

 Oliver pond, at the summit of Cobble hill, and on Ledge hill just 



