2l6 



RELICS OF PRIMEVAL LIFE 



Pre-PalcEozoic Rocks of Southern New Brunswick^ 

 as tabulated by Matthew : — 



Coastal series (or system), 1872.— 

 Grits, hydromicaschists, argillites, etc. 

 resembling the Pebidian rocks of Dr. H 

 Hicks 



COLDBROOK SERIES (OR SYSTEM), 1865.— 

 Diorites, felsites, petrosilex, etc. ; re 

 sembling the Arvonian rocks of Dr, 

 Hicks. Thickness more than . . . 



Upper series (or system) of Lauren 

 TiAN, 1872. 



Upper division. — Argillites, lime- 

 stones, graphitic shales. Fossils. In 

 upper part of the upper limestones of the 

 South basin, fragmental Eozoon, observed 

 by Sir J. W. Dawson in specimens sent 

 him. In middle of upper limestones in 

 Middle basin, spicules of sponges. In 

 graphitic shale of South basin, spicules 

 of Halicho7tdrites graphitiferus. In low- 

 est limestone of the Middle basin, the 

 reef of columnar fossils described as 



Archreozoon . 



Middle division. — Quartzites, sili- 



cious schists, Fossils Cyatlwspongia (?) 



eozoica near the top of this division . . 



Lower division. — Limestones and 



gneisses. No Fossils known 



Lower series of Laurentian.— 

 Gneisses, Micaschists, etc 



Thickness 

 Feet. 



10,000 



5,000' 



740 



450 



260' 



^ The above thicknesses are on the authority of Dr. L. 

 W. Bailey. Report Progress Geological Survey Canada^ 1879, 



