BIGSBY — GEOLOGY OF QUEBEC. 



99 



1853.] 



conglomerate next above :— see fig. 6. The conglomerate from which 

 this fragment has been detached has very small pebbles of limestone, 

 lumps of black clay, fragments of hyaline and brown quartz, and 

 grains of chlorite. Great disturbances are also met with in the fields 

 above, and near this road. 



Fig. 6. — Section on the road-side, Lauzon Cliff. 



a. Calcareous conglomerate, pebbles very small ; with lumps of black and green clay, and 



fragments of pale brown and hyaline quartz. 



b. Clay-slate, enclosing a fragment of a, 22 feet long by 6 feet. 



c. Coarse calcareous conglomerate, with fragments of pale limestone, often angular, and 



3^ inches long ; hyaline quartz in drops, and long slips of clay-slate ; white and red calc- 

 spar in veins ; rock-crystal and bitumen in geodes : — 10 feet thick, 



d. Clay-slate. 



The upper conglomerate (10 feet thick) contains angular fragments 

 of the diameter of | — 3^ inches. They are pale limestone, green 

 and black clays, and hyaline quartz. It has also druses of rock- 

 crystals, white and red calc-spar, and bitumen in crusts and geodes. 



Some yards west of this, a second road mounts the same broken 

 chflF. It displays alternations of strata similar to those just de- 

 scribed, but I refer to it on account of a coarse calcareous pudding- 



