THE KITCIU SCHISTS. 163 



atendeucv to seliistosci structure that is uen-er vmy pronounced, lint wliii'li 

 varies considerably in its decree of develoimieut. 'The rocks contaui 

 pel)l)le-like Ijodies varying in size from 2 feet in diameter down to minute 

 friii;nients. 



Occ,asi(mallv tlieso appear t;> !)■ well roumli-d, l)ut more coininonly 

 they are subanguLir and tiattened in a direction paraUel to the schistosity 

 i)lanes in the inclosing;- rock. On exposed sui-faces the " pel)l)les" stanil 

 out l)y virtue of their whiter weathering. (See fig. 4, p KU.) » )n a fresli 

 fracture thev are not nearly so apparent, but seem to diffei' from the rest 

 of the rock 1)\- their lini-r grain and their pinkish or gre(;nisii color, the 

 body of the rock having usually a dark greenish-gray tint. 



This description applies well to the exposures along the Deer Lake 

 road. Klsewhere the "pebbles" are more commonly roundcMl than angu- 

 lar. Many of them arc; as rounded as the waterworn pebbles of a, modern 

 l)each. (See I'l. V.) In many jdaces they may be seen disposed In 

 bands of different widtlis that run i)arallel t(. the schistosity of the rock, 

 whose strike is about east and west and whose di}) is at some high angle 

 to tlu! south. Between the.se bands are others from which the "i)el)l)les" 

 are absent, or in whicii they are very scarce. These nonconoh.ineratie. 

 beds are like the matri.x of the conglomeratic ones, exce^jt that there are 

 scattered through tlu^ rock small, light-colored grains of feldspar. These 

 are often mashed into lenses, or even into thin, sheet-like layers, rumiing- 

 ])arallel to the planes of schistosity, when the rock presents somewhat of a 

 gneissic aspect. In these rocks sharp-edged fragtnents of plagioclasc^ may 

 not infrequently be detected in the midst of a tine, satiny gromidmass of 

 chlorite plates and calcite grains, entirely dilierent in character from the 

 matrix of any schistose sedimentary rock met widi in the district. The 

 rocks are evidently l)asic tuffs. 



Another variety of the schistose tnflP occurs most commonly near the 

 edges of the area, especially at the contacts with the :\Iar(|uette be<ls. In 

 the field notes the rock is called a sericite-scliist. It is a pink 1o wliite, 

 platy, and schistose rock, with a very pronounced soapy feel. On surfaces 

 of the hand specimens that are at riglit angles to the schistosity sharp 

 particles of dilferent minerals are to be seen, but on the surfaces parallel 



