Conglomerates with Gneiss, Talcose Schists, &c. 377 
3. The force by which the pebbles were flattened and indented 
must have operated laterally, as would result frome the plication 
of the strata; folds in which are frequent. If there was a great 
superincumbent pressure and less in the direction of the strike, 
the same lateral force might have elongated the pebbles. But 
these phenomena. We have been driven to the supposition of 
some see ete force acting upon soft materials. If, as Sir John 
oses, cleavage d 
erates, which we now proceed to deseribe. We select two local- 
ities, although doubtless many others might be found equally 
instructive. ck oceurs on both faces of the Green Moun- 
tains, and we can hardly doubt that it once formed a fold over 
the mountains, which denudation has swept away. — 
We have found this rock in connection with quartz rock, 
mica and taleose shists, and gneiss; sometimes merely in juxta- 
Position, as in the case of the quartz rocks, but sometimes inter- 
stratified. The conglomerates at the different localities may not 
