246 On the Geogra'phy mid Geology 



two miles and an half east from the Peek River, is filled with very 

 large oblong nodules of the granitic matrix. I saw one example 

 of the inosculation of two nearly equal veins. Their direction is 

 W.S.W. ; but in one of their frequent curvatures they join, and 

 are then (10 feet broad) almost as wide as previous to the union. 

 They soou separate into two unequal portions. 



By far the most common direction of these veins is N.W. : 

 and it usually ranges between that point and N.E, Any course 

 not included within these limits is comparatively rare. It is 

 in very gentle curves or in straight lines ; sometimes, however, 

 without evident cause, breaking off abruptly into a series of strong 

 curvatures. (Fig. iv.) The position is either vertical or inclined. 

 The differences in direction cause frequent intersections ; of these 

 I could examine but very few. Thirty miles south from the River 

 Peek, four veins going N.E., cut and displace a fifth passing 

 N.W. ; three of the first mentioned set are twelve feet broad 

 each. In the example of intersection, sketched in fig. iii., the 

 place of meeting is filled with rubbish. 



These veins occur v;ithout any regularity as to size, numbers, or 

 direction, ^r. ; sometimes appearing singly ; at others in company. 

 About twenty miles east from the Otter's Head, twenty large veins 

 are met with, passing to the N.W. in the space of 400 yards. This 

 is an extreme case. Four or six are several times seen together. 

 Between the Crags and the River Peek, there must be at least 

 300 veins ; from whence originating I know not, unless from the 

 trap formations of the middle and western parts of this lake. They 

 are composed of fine and large granular, or small crystalline 

 greenstone trap, bluish or brownish black; that is, of a rock in 

 this instance chiefly hornblende, the rest bemg feldspar and iron. 

 This line of contact with the granite or greenstone, ^-c, is wel' 

 defined and close. While the body of the dyke is deep black and 

 large granular, the sides are sometimes almost compact, and 

 greenish black. Ten miles N.W. from the Otter's Head, in a 

 cove of the same bay, in which occurs the vein represented in 

 fig. i., is what may be the ruins of a vein of porphyritic trap ; the 

 crystals being of feldspar. From a fissure in a mouldering rock, 



