OF DYNAMICAL GEOLOGY—BAILEY. 187 
variety of folding, and through a scale equally various, is here 
exhibited ; while the outline of the coast, distinguished by long 
projecting tongues of land and intervening narrow valleys or 
fiords, affording natural sections, make their examination 
unusually easy and attractive. The erosive action of the sea, as 
modified by the unequal hardness and the varying altitude of 
the beds, together with the positions, equally various, of bedding 
planes, cleavage, joints and fault planes, is also strikingly 
exhibited. Upon the coasts of Queen’s and Shelburne Counties 
the rocks are either Cambrian quartzites and slates, or granite, 
and the former are generally, though not always, titled at high 
anges, the result of orogenic movements of which the date has 
not as yet been definitely fixed. A characteristic example of such 
tilted beds is to be seen on Lockeport Island, not far from the 
point exhibiting the glacial furrows already deseribed. The 
ledges here exposed are composed of quartzite, dipping 40° or 
50°, while the parallel troughs by which they are separated 
correspond to the softer and more easily removed slaty beds. A 
feature of additional interest in the case of this quartzite ledge, 
is the fact that, notwithstanding the metamorphism of the 
quartzite, which glistens with scales of mica, its surface shows a 
number of unmistakeable impressions of what have elsewhere 
been described as fossils under the name of Asteropolithon. The 
real nature of these impressions, however, (which may be well 
studied in the quartize ledges on the summit of the hills over- 
looking Bedford Basin,) whether really organic or only imitative 
forms of concretionary origin, is still disputed. If of organic 
derivation, (and some of the markings seem inexplicable upon 
any other view,) they probably represent the burrows and the 
radiating trails of marine worms. 
While the southern coasts owe their peculiarities largely to 
the general presence of Cambrian quartzites or of granite, those 
of Yarmouth and Digby illustrate, in an equally striking way, the 
results of upheaval and of marine erosion where the prevailing 
rocks are slates. The most remarkable exhibitions of the effects 
due to these two causes are to be found about Point Fourchu, 
(Yarmouth Harbor), in the vicinity of Chegoggin Point, thence 
