':2<S 



POMPECKJ. JURASSU; FAUNA OF CAPE FLORA. [norw. pol. exp. 



Farther south in this valley east of Gape Gertrude, however, (on the east 

 side of the valley) there is „a line and ridge of detached nunataks, com- 

 posed of basalt, and averaging 320 feet above sea-level". „This hne of nuna- 

 taks continues through the whole of this valley, about 2 or 3 miles" i. Pos- 

 sibly the low position of the basalt here, may be owing to a dislocation of 

 some kind. 



Upon the whole there is apparently not much regularity in the position Ox 

 the basalt, and the height of its base above sea-level on Northbrook Island. 

 At Cape Gertrude, according to Kosttlitz, its base is masked by the talus 

 heaps but may be some 180 to 210 m. (600—700 feet) above sea-level. At 

 an exposed rock (fig. 6, 3) some seven kilometres farther east along the south 



Fig. 6. Northbrook Island, based on 

 Mr. F. Jackson's map of Frans Josef Land- 

 The places where the underlying rock 

 projects through the ice-covering are in- 

 dicated in dark colour. 1 Cape Flora. 

 2 Cape Gertrude. 3 Cliffs east of C. 

 Gertrude. 4 Cape Barentz. 5 Camp Point. 

 6 Valley east of C. Gertrude. 7 Valley 

 east of Gully Rocks. 8 Windy Gully. 



coast, feast of the valley mentioned above) there are „several bosses of ba- 

 saltic rock protruding from the general talus-slope, and apparently in situ" ^. 

 They are perhaps some 90 or 120 m. (300 or 400 feet) above the sea. 

 At Cape Barentz, at the south-east corner of the island, and at Camp Point, 

 at its northern extremity, the basalt cliffs reach the sea. In both these pla- 

 ces, the upper edge of the basalt is only some 45 m. (150 feet) above sea- 

 level ^. 



The probability is that various dislocations have occurred in the neighbour- 

 hood of Northbrook Island, as elsewhere in Franz Josef Land, and that this, 

 to some extent, is the cause of this land being broken up, as it is, into islands, 

 with numerous sounds and fjords. But then it ought also to be remembered, 

 that it is not a priori probable, that the basalt flows were poured out over 



' Communicated by Dr. Koettlitz. 

 2 Koettlitz, 1. c. 1898, p. 625. 



