Vol. 54.] ROCKS AND FOSSILS FROM FRANZ JOSEF LAND. 649 



they are practically of the same age. If the sheets of basalt be 

 intrusive, the difference of altitude will be no indication of different 

 age. 



(b) A number of fissile slabs of a brown, laminated, siliceous rock 

 (92 per cent, of silica) have been collected at Windy Gully, north-east 

 of Elmwood, from between the second and third tiers of basalt, at 

 about 700 feet above the sea. These specimens include numerous 

 plant-remains, but for the most part they are very fragmentary. 

 Some few are well preserved, and among these are pinnules of a 

 fern resembling those referred to Thyrsopteris ; a very perfect leaf of 

 Ginkgo (PI. XXIX, fig. 3), which may be the G.polaris of Nathorst ; 

 and seeds, with needles of conifers. 



The similarity of the plant-remains in the beds which have been 

 observed around Cape Flora, in close relation with the basalts, leaves 

 little room for doubting that these plant-beds are all of the same 

 age. 



2. East of Elmwood. 



Erom a spot between Castle Eock and Sharp's Rock, at about a 

 mile east of Elmwood, part of a tree-trunk has been obtained 

 which is 40 inches in circumference. This specimen, which is about 

 2 feet long, is interesting from its having been found in situ at the 

 base of the second tier (from below) of the basalt, and in all proba- 

 bility indicates the horizon from which much of the silicified wood 

 has been derived. This specimen is not wholly silicified, some parts 

 being preserved in carbonate of lime and others possibly in carbonate 

 of iron. 



3. Elmwood. 



A number of additional specimens have been obtained from the 

 watercourse and talus at the back of Elmwood, but there is nothing 

 to add to the information already derived from the earlier series. 

 A quarter of a mile north-west of Elmwood a fragment of Ammo- 

 nites Lamberti (PL XXIX, fig. 2) was obtained in situ immediately 

 below the basalt, and consequently about 50 feet higher than 

 the young A, Tcheflcini found in place at the back of Elmwood. 

 Ammonites Lamberti is definite evidence that the beds directly 

 below the basalt are of Oxfordian age, and its position above the 

 A. Tchefkini and A. modiolaris makes it probable that Oxford Clay 

 occurs at this place. 



4. Windy Gully. 



The shoulder of rock at the southern end of "Windy GuUy is, 

 according to Dr. Kcettlitz, about 370 feet above the sea at its 

 lowest part, and rises to over 400 feet. The beds dip at from 1° to 

 3° to the N.N.E. Several portions of Ammonites Ishmce var. have 

 again been found at this locality ; but more interesting perhaps are 

 a large lamellibranch and a belemnite, which seem to be altogether 



Q. J. G. S. No. 216. 2 z 



