22 G. W. Hawes—Albany Granit., 
shown in fig. 1.* Although but a small mountain several of 
the most characteristic New Hampshire granites take part in 
attention to the Albany gran- 
ite,t which forms an immense 
of a dike about three hundred 
feet wide. The Conway gran- 
ite, a coarse-grained biotite 
granite, forms the hanging wall, 
and argillitic mica schists form 
the foot wall of this dike. Mt. 
Nt nl = \ inh ) nenly — : hae ho 
| near a thousan eet hig 
Map of the Mt. Willard region. Seale tc ce of tees three rocks 
24 miles to one inch. 
narrow dike that connects the Ramberg and Brocken, two 
granite mountains in the Harz, the phenomena connected with 
which have been described by Lossen 
The wpm Gee cece is a very distinctly <2 npaponnd char- 
acterized c the spotted or 
trachytic ee fr all its areas it as the same Sandiar 
* This map is essentially a reproduction from the large geological map of New 
Hampshire, prepared by Professor C. H. Hitchcock, and forming hy part of the 
atlas accompanying his geological report. Under his direction area marked 
“ breccia Last has b ed. This is a distinc ite mass hibit includes 
in certa Sar a blocks of gneiss. Such inclusions 
granite ae iare in New Hampshire, and are also known abr The figur 
on page 225 in vol. i of Naumann’s Geognosie, drawn from a cliff on 
It is to the granite which includes these fragments t pk Professor Hitchcock has 
given the title of breccia granite. Upon his geological map he has considered the 
Albany and the Conway gran nites as eruptive, and the Concord as metamorphic. 
In this paper I deal simply with the Albany granite, and introduce this map to 
show the relationship in which the rag and this granite stand with reference 
to one gprs be and especially the form of the area “Gaapiel by the Albany 
nite. If contact phenomena take ence over details of internal stru : 
the origin of all the other granites including the Concord granite and the gneiss 
are open questio 
+ So named a Palo Hitchcock on account of its extensive development in 
Albany, ee H. 
Zeitschr. d, d. Geol. Ges., 1874, p. 856. 
Fog poke ea of this granite see Hitchcock’s Geol. New Hampshire, vol. ii, 
