KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 51. N:o 3. 7 
extension in both kinds of rock. The strike varies mostly between N. 65” W.-—S. 65” O. 
somewhat S. and W. of Punta Föé6sil and N. 15” W.—S. 15” 0. at Punta Carbön. Only 
on the northern promontory, at Punta Fösil, is there a different strike, or due E.—W. 
The dip of the strata is mostly steep, varying from 20? to 65”. The rock is much 
broken up by fault-lines, and areas of different strike and dip border closely on each 
other. Petrified wood, often pierced by bore-mussels, occurs in several places. The 
marine shells were found at b, a little south of Punta Fösil, where they occurred 
sparsely in the finer grained varieties of the rock. They consisted chiefly of mussels, 
which were mostly rather fragmentary. The fossils from this locality have unfortu- 
nately not yet been examined by a specialist. 
Further west on Peninsula Burleigh there occur a couple of small exposures of 
the same kinds of rock. In the place marked a on the sketch-map, I collected some 
gt N 
CA & 
Pta Carbon 
Pra Yahgan 
<R Jte Asmussen 
Fig. 1. Sketch-map of a part of the southern side of Bahia Tekenika. 
Scale approximately 1:735000. 
few fragments of fossil plants, in a very small outecrop of hard bluish slate, of which 
the strike and dip could not be ascertained. The fossils were of the poorest possible 
quality, yet they have proved to be of considerable importance, since a number of 
them could later be identified as belonging to the genus Dictyozamites. These speci- 
mens are described below as Dictyozamites cf. falcatus (MORR.) OLDH. Of the other 
plant-remains, one little fragment represents a fern, probably of Sphenopteris-type; 
the rest are quite undeterminable. 
The formation described above recurs further to the east. On the outer side 
of Punta Yahgan and on the little islet east of it, Islote Asmussen, a strike in 
N.W.—S.E. appears to prevail, and in its continuation the formation is again met 
with on the east side of Bahia Navidad (at c on the sketch-map). The strike remains 
N.W.—S.E., the inclination is mostly steep, but the strata are much dislocated by 
faults which cause a very great variation in the dip within a short distance. There 
is some difference in the lithological character of the formation in this place as 
