NATURAL HISTORY AND PHYSIOGRAPHY OF NEW BRUNSWICK. 533 
105. — On the Square Forks of the Sevogle and their 
“ Interglacial ” Testimony. 
Read December 4, 1906. 
From several points of view the Square Forks of Sevogle is 
one of the most notable localities of New Brunswick. Scenic- 
ally, the Forks, with the associated gorges, all readily visible from 
the surrounding burnt plateau, are strikingly wild and fine. To 
the sportsman it appeals as including one of the best salmon- 
fishing privileges in this Province. Physiographically, it offers 
a curious problem in the unusual and anomalous arrangement 
whereby two large rivers come together, end to end, in the middle 
of a single straight gorge, and then turn their united waters at 
right angles through another. Geologically, it offers testimony, 
which, I think is conclusive, of fluctuations in the glaciation 
of the Province, if not indeed of an interglacial period. 
Despite the interest of the place, it has as yet received scant 
scientific attention. The only geologist who makes any mention 
of it is Dr. Chalmers, who, in his Report for 1888, gives a brief 
description of the place, with some comment upon its probable 
origin, and a diagram of the arrangement of the gorges. My 
own knowledge is based upon a short visit in 1905, and another, 
in 1906, when I made the accompanying map and observations. 
Briefly, the facts are these. As shown by the map, the North 
the South Branches of Sevogle, the former running in a right- 
angled gorge, meet in the middle of a straight gorge, then turn 
at right angles through another, all of a typical glacial type, with 
steep, often vertical rocky wads, some 50 to 75 feet in height. 
But this is not all. Closely interlocked with the gorges are 
other valleys, now dry, but which must have had a part in the 
evolution of this remarkable place. Thus a rather ripe-looking, 
drift-bottomed, low-sloping valley lies opposite the gorges on the 
westward. From it a short gorge or vailley, having a rocky 
bottom (covered, however, with fine drift) above the present 
water level, extends through to the present gorge, nearly opposite 
to, but not quite matching, the gorge of the combined streams. 
Then another valley, hardly a gorge, though very steep-walled 
in places, and also possessing a rocky bottom above the present 
