788 REGINALD ALDWORTH DALY 
described an occurrence of the opposite of this.t_ He deter- 
mined that the red gneiss of the Erzgebirge is plainly eruptive 
into the gray gneiss. The apophyses of the former have a 
distinct parallel arrangement among the constituents. It is, 
however, not parallel to the walls, but inclined to them. He, 
hence, concludes that it is due to pressure exerted after the 
consolidation of the ancient granite.» That the apophyses 
should be as coarsely porphyritic as the main body, is of itself 
a strong suggestion of the exotic origin of the latter3 As 
we have seen, such is the case with the porphyritic granite, 
and in many instances, as on Saddle Hill, on Sandwich Moun- 
tain, in the Greenfield dike, and at Fitzwilliam, the apophyses 
have a more or less well-developed foliation, parallel to the 
walls and transverse to the structure-planes of the schists. 
Lastly, while the porphyritic granite shows in certain areas 
evidence of strain, there is none of that very intense crushing 
which might be looked for if the foliation were of a mountain- 
built origin.4 The signs of pressure in some of the pheno- 
crysts may be due to the shearing set up among them in the 
tough, but still viscid magma, just on the instant of final con- 
solidation. At the south end of the Ashuelot area we have 
the most schistose phase of the rock. It has evidently been 
squeezed to some extent. It is crumpled and even changed 
to an augen-gneiss whose lenticular feldspars represent the 
idiomorphic phenocrysts of the original rock.’ Small faults of 
a half foot throw were observed in the Winnipiseogee area, just 
Surv. Canada, 1885, CC. p. 83, Danzic, Ueber die eruptive Natur gewisser Gneisse 
sowie des Granulits im sachsischen Mittelgebirge ; Mitth. aus dem min. Inst. der 
Univ. Kiel. Bd. I, Heft 1, 1888, p.67. RruscH, Neu. Jahrb., Beil. Bd, V., Heft 1. 
1887, p. 57. 
tDie Gneisse des sachsischen Erzgebirge ; Zeit. d. d. geol. Ges., 1862, pp. 122-123. 
2Credner attempted to prove that the red gneiss of the Erzgebirge is of sedi- 
mentary origin and not eruptive, as held by von Cotta, Scheerer, Stelzner, and others. 
Zeit. d. d. geol. Ges., 1877, p. 757. 
3Cf. MCMAHON, Geol. Mag., 1888, p. 63; Q. J. Geol. Soc., 1893, p. 357. 
4Cf. Lawson, The Geology of the Rainy Lake Region, Ann. Rep. Geol. Surv. 
Canada, 1887-8, F, pp. 137-138. 
5Cf. HAWEs, Geol. of N. H., III, p. 214. 
