358 



DESCRIPTION OF THE COUNTRY 



The same rocks continue through the next bay, the lower beds being amygda- 

 loidal, and filled with zeolites. At the point below, and immediately after turning 

 it, the beds are thin, and tilted up, as seen in the figure below. 



/ 



a. Greenstone, b. Metamorphosed shales, c. Volcanic grit. d. AmygdaloiJal shale, c Volcanic grit. /. Clay and marl. 



Immediately after turning into the bay into which Goosebery River empties, a 

 dike of No. 615 occurs, showing beautiful clusters of columns, and traversing what 

 appears to be a north-30°-east dike. Just below Gooseberry River, large fragments 

 of rounded rocks were seen embedded in the metamorphosed shaly rock, which is 

 overlaid by the bed of compact columnar rock noticed at other places, and the 

 whole capped by a basaltic bed, as shown in the annexed cut. 



a. Metamorphosed shales, b. Compact beds, somewhat hrecciated. c. Basaltic bed. 



The basaltic bed forms regular columns, and at one point on the shore has dis- 

 integrated in such a manner as to leave three clusters of columns, several feet in 

 height, standing on the metamorphosed beds which slope gently to the Lake. 



CLUSTERS OF BASALTIC COLUMNS. 



At one place in the same bay, a thin bed of basaltic rock was seen beneath the 

 upper beds of the altered rocks. It was probably intercalated at the time of the 

 overflow of the upper beds. 



Near the mouth of Split Rock River, there is a section showing in ascending 

 order, eight or nine feet of shale, twenty feet of basaltic rock, six feet of conglome- 

 rate, and about thirty feet of volcanic grit, all highly metamorphosed, and overlaid 

 by a thick bed of basaltic trap. The shale and lower basaltic bed appear to be 

 horizontal, while the sand-rock and trap-bed dip to the east. Section 3, on Plate 

 3, N, shows the succession of these strata : a, basaltic bed ; b, volcanic grits ; c, me- 

 tamorphic shale. On the west side of the exposure the volcanic grit is also in 



