NEW HAMPSHIRE. 



385 



- Quebec Group 



In the First Annual Ecport of the New Hampshire Geological Sur- 

 vey, 1869, Prof. C. H. Hitchcock divided the rocks thou examined as 



follows : —*■ 



" Gucissic, Granitic or White Mountain Series. 

 Sttiurolite Schists 

 Lower (mostly green) Schists 

 Copper Belt 

 Clay Slate 



Auriferous Conglomerate 

 Upper Schists." 



Prof. Hitchcock in that Report states that 



"there are two general divisions . . . ., hrst the granitic and gneissic rocks 

 which appear to he older and consequently to underlie the formations of the 

 Becond or Quebec group — the true auriferous strata. The name Quebec is 

 that applied by Sir W. E. Logan, of Canada, to rocks .... shown to consti- 

 tute a new group, not present in the New York series, but lying between the 

 Calciferous Sandrock and the Chazy Limestone." (/. c, p. 17.) 



No evidence is given to show that the rocks belong to the Quebec 

 group, and that the granite is not eruptive, nor are its relations to the 

 supposed Quebec group stated. All is based upon theoretical grounds. 



In the Second Annual Report, 1870, the rocks of New Hampshire are 

 arranged as follows : 



*' 1. PFJiite Mountain or Gneissic series^ subdivided into 



1. Normal Gneiss. 



2. Ferruginous Gneiss. 



3. Granitic Gneiss. 



4. Pcldspathic Mica Schist. 



5. Andalusite Gneiss. 



6. Chiastolite Slates. 

 V. Granite. 



8. Syenite. 



9. Porphyritic Granite. 



10. Quartzitcs. 



11. Limestones, 



12. Soapstones. 



'* Little doubt remains as to the Eozoic or prc~SiIurian age of this entire 

 scries. 



n 



**2. Sicniie of Exeter and Dover, 



*' There appear to be sienitic rocks of j^robable Laurentian age, equivalent 

 to the Quincy sienitic group of Massachusetts, .... in the towns of Exeter 

 and Dover. They form, apparently, an anticlinal mass, overlaid by the Mer- 

 rimack slates." 



VOL. VII. — NO. 11. 25 



