45 2 Ckonos Archipelago. part n. 



degree of uniformity in direction. At the northern 

 end of the group, at Low's Harbour, the well-defined 

 folia of mica-schist everywhere ranged within eight 

 degrees (or less than one point of the compass) of 

 N. 19° W. and S. 19° E. ; and even the point of dip 

 varied very little, being always directed to the west and 

 generally at an angle of forty degrees : I should mention 

 that I had here good opportunities of observation, for I 

 followed the naked rock on the beach, transversely to 

 the strike, for a distance of four miles and a half, and 

 all the way attended to the dip. Along the outer islands 

 for 100 miles south of Low's Harbour, Lieutenant Stokes, 

 during his boat-survey, kindly observed for me the strike 

 of the foliation, and he assures me that it was invariably 

 northerly, and the dip with one single exception to the 

 west. Farther south, at Yallenar Bay, the strike was 

 almost universally N. 25° W., and the dip, generally at 

 an angle of about 40° to W. 25° S., but in some places 

 almost vertical. Still farther south, in the neighbour- 

 hood of the harbours of Anna Pink, S. Estevan, and S. 

 Andres, and (judging from a distance) along the southern 

 part of Tres Montes, the foliation and cleavage extended 

 in a line between [N. 11° to 22° W.] and [S. 11° to 

 22° E.] ; and the planes dipped generally westerly, but 

 often easterly, at angles varying from a gentle inclina- 

 tion to vertical. At A. Pink's Harbour, where the 

 schists generally dipped easterly, wherever the angle 

 became high, the strike changed from N. 11° W. to 

 even as much as N. 45° W. : in an analogous manner 

 at Yallenar Bay, where the dip was westerly (viz. on an 

 average directed to W. 25° S.), as soon as the angle 

 became very high, the planes struck in a line more 

 than 25° west of north. The average result from all 

 the observations on this 200 miles of coast, is a strike 

 of N. 19° W. and S. 19° E. : considering that in each 



