168 



at 514 metres is a yellow sandstone, containing Ostreas, Be- 

 lemnites etc. Ostreas are present in great numbers and the shells 

 were seen to be partly weathered out, so as to be quite whole. 



On the map , accompanying his paper in Geol. Foren. 

 Förh. , Nathorst has further indicated a certain region on the 

 south-west side of Davy's Sound at Antarctic's БагЬоиг as 

 doubtfully of Jurassic age. Here, the rocks on the shore have 

 more gentle outlines than the Silurian and Devonian rocks 

 further north in King Oscar's Fjord. The mountains east of 

 Antarctic's Harbour consist partly of soft, coloured sandstones 

 with obscure plant-remains. A block of impure , arenaceous 

 limestone with obscure animal-remains, recalls, in some measure, 

 the Cape Stewart rock. Possibly we are here dealing with the 

 Keuper and Jurassic deposits of Hurry's Inlet, which may 

 extend to this point. 



With regard to the geological structure of the district, 

 Nathorst infers that the whole of Greenland must be regarded 

 as a «Horst», which must in earlier times have been more or 

 less covered by sedimentary deposits. These are only preserved 

 in areas of depression and in small «Grabensenkungen», along 

 the coast, or beneath the eruptive masses, which have been 

 brought to the surface in consequence of these depressions. As 

 regards the Jurassic deposits, it must be supposed that the small 

 exposures on Kuhn Island occur in «Grabensenkungen» which 

 have a north and south direction. The Jurassic rocks of Jameson's 

 Land also are depressed in relation to the crystalline rocks. 



The Jurassic deposits of Jameson's Land were once more 

 examined in 1900 on the occasion of the Danish expedition to 

 the East coast of Greenland under the direction of N. Hartz ^), 

 while G. Amdrup, who had the chief command of this expedi- 



Hartz, N. 1902. Beretning om Skibsexpeditionen til Grönlands Östkyst 

 for Tidsrummet fra d. 18. Juli til d. 12. September 1900. Meddelelser 

 om Grönland. Hefte 27, p. 155—181. 



