188 TRANSACTIONS OF THE ~ - [apr. 15, 
Huronian including the Coldbrook, Coastal, Kingston and Etcheminian 
groups. 
The upper limit of the pre-Cambrian in New Brunswick. 
Classification of the volcanic rock types. 
THE EFFUSIVE ROCKS OF THE COLDBROOK, COASTAL AND ETCHEMINIAN 
GROUPS. 
Quartz-porphyry, felsite-porphyry and ash-rocks. 
Diabase and porphyrite. 
Metamorphism. 
THE SODA-GRANITE, with an analysis. 
THE KINGSTON GROUP. 
COMPARISONS. 
DYKE ROCKS. 
Diorite-porphyrite, with an analysis. 
DIABASE. 
Quartz-diabase, with an analysis. 
Augite-porphyrite. 
ADDITIONAL NOTES ON THE LAURENTIAN ROCKS. 
OTHER VOLCANIC ROCKS IN NEW BRUNSWICK. 
SUMMARY. 
PLATES XII-XVI at end of volume. 
LITERATURE. 
1. Reports of the Geological Survey of the Province of New Brunswick, 
1839-43, by Abraham Gesner. 
2. Observations on the Geology of Southern New Brunswick, by L. W. 
Bailey, G. F. Matthew and C. F. Hartt. 
3. On the Azoic and Palaeozoic Rocks of Southern New Brunswick, by G. 
F. Matthew. Quar. Jour. Geol. Soc. XXI., 422. 
4. Remarks on the Age and Relations of the Metamorphic Rocks of New 
Brunswick and Maine, by Geo. F. Matthew and L. W. Bailey. Proc. Am. 
Ass. Adv. Sci. 1869, 179. ; 
5. Preliminary Report on the Geology of Southern New Brunswick, L. W. 
Bailey and G. F. Matthew. Can. Geol. Sur. Rep. 1870-1, p. 13. 
6. Summary of Geological Observations in Southern New Brunswick, by 
L. W. Bailey and G. F. Matthew. Can. Geol. Sur. Rep. 1874-5, p. 84. 
7. Report of Geological Observations in Southern New Brunswick, by L. 
W. Bailey, G. F. Matthew and R. W. Ells. > Can. Geol. Sur. Rep. 1875-6, p. 
348. 
8. Report on the Pre-Silurian (Huronian) and Cambrian or Primordial 
Silurian Rocks of Southern New Brunswick, by L. W. Bailey. Can. Geol. 
Sur. Rep. 1877-8, p. 1-34 DD. 
9. Report on the Upper Silurian and Kingston (Huronian) of Southern 
New Brunswick, by G. F. Matthew. Ib. p. 1-6 E. 
