714 REGINALD ALDWORTH DALY 
terrane outcrops one mile anda half north of Holderness on the 
upper road. Here a gigantic slice of the country rock, about 
sixty feet wide and three hundred feet long, has been floated 
off and rests with its longer axis north and south, 2. e., parallel 
to the molar contact. It is composed of the usual biotite gneiss 
in which a thick sheet of hornblende-gneiss lies embedded, 
making up most of its mass. The latter has itself the appear- 
ance of being an eruptive rock which is thus older than the 
porphyritic granite. Associated with it are a large number of 
smaller biotite gneiss fragments which have no definite arrange- 
ment, but make a confused medley of discreet masses in the 
porphyritic rock. The whole looks like a huge flow breccia. 
Rather more than a half mile further north on the same road, 
there is a breccialike aggregation very similar to the last, even 
to its containing hornblende-gneiss folded up in a large mass of 
biotite-gneiss. 
Three hundred yards west of where Dr. Dana's road leaves 
the four corners at New Hampton Centre we note another of 
those zones of transition between the porphyritic granite and 
the schists in contact with it. It is some twenty feet wide, and 
is strikingly similar in appearance to the case already described 
at Centre Harbor. Here the schist is cut by intrusive tongues 
with more or less sharp boundaries. These apophyses run across 
the gneissic planes. 
On the extreme eastern end of the Sandwich Mountains 
at an elevation of about seven hundred feet above the Bear 
Camp River, a remarkable flow breccia or ‘‘ permeation aed 
outcrops in some extensive pasture fields. The rock presents 
all the features of a plutonic flow. The horses are here almost 
entirely hornblende-gneiss, some of them massive, both fine- 
grained and coarse-grained, others distinctly schistose. The 
porphyritic granite is on the whole granitic in appearance, but 
at the boundaries of the fragments, the feldspar phenocrysts are 
often oriented about them in a way which is strongly suggestive 
of a flow structure. The usual trendless nature of its constitu- 
* Barrow, Q. J. Geol. Soc., 1893, p. 331. 
