NATURAL HISTORY AND PHYSIOGRAPHY OF NEW BRUNSWICK. 183 
this character continues to the Falls, two miles above the Forks. 
Here the river drops over a symmetrical stair-like fall of some 
four or five steps, navigable with some difficulty for a canoe. 
Just to the westward of the Falls rises Caribou Mountain, a pro- 
minent bare mountain, some 750 feet above the river, and i,ioj 
feet above the sea, from which a grand view of all the surround- 
ing country can be obtained. On ascending it, one finds that h 
is but part of a marked and lengthened range running almost 
exactly southwest (true) with many abrupt rounded summits, 
presenting all the aspects of a typical intrusive ridge. Moreover, 
the same range can be traced to the northeast across the river, 
where it is equally lofty, though less abrupt.* Now this moun- 
tain is composed of felsite, and it is a part of it which here forms 
the fall in the river. In this prominent range, accordingly, we 
appear to have a great ridge or immense dyke of intrusive felsite, 
forming so marked a feature of the topography of this region, 
and a band showing this formation should be inserted upon the 
Geological map. 
This range in its far westward extension is the same abrupt 
range of rounded summits, I believe, as can be seen from the top 
of Sagamook, off some eight or ten miles a little to the west of 
North (true), and it may even continue somewhat beyond, and 
form a part of the watershed between the Little Tobique and the 
Northwest Branch of Upsalquitch. From Caribou Mountain 
there can also be seen off to the southward, some four or five 
miles away, another parallel and similar range of hills, evidently 
the so-called pre-Cambrian band marked on the Geological map ; 
this range extends northeastward into some very lofty hills, and 
southwestward into a general mass of elevated country, with some 
marked peaks, continuous, I believe, with the range ending in 
Mount Gordon or Nictor Lake, and perhaps extending beyond 
along the Geologists’ Range. Between these two ranges, the 
country marked on the map as Silurian is much below their level 
and somewhat flat. Furthermore, off to the northward, some 
five or six miles away, rises a lofty smooth-topped ridge, which 
*Ells (Geological Report, 1879-80, D, 37) refers to this mountain, but he did not ascend 
dt, and he considered the felsite area as detached and of small extent. 
