Our knowledge of the petrographical conditions of the East 

 coast of Greenland has hitherto been very scanty. H.Knutsen, 

 a member of the Holm Expedition of 1883 — 85, certainly gives 

 us some information as to the kinds of rocks which occur at 

 and south of Angmagsalik M, but no petrographical investigation 

 appears to have been made. 



A. E. Torn eb ohm-), who described some of the material 

 collected at Tasiusak (King Oscar's Harbour) during the 

 INordenskiöld Expedition of 1883 must therefore be regarded as a 

 pioneer in these investigations, and the material he describes is 

 of great interest for several reasons. The specimens in question 

 include garnet-gneiss, pyroxene-gneiss, hypersthene- 

 gabbro, and bronzite-diabase in blocks, besides some — in 

 this connection less interesting — proterobase-aphanite 

 and flint. According to his short notes, the pyroxene-gneiss 

 consists of plagioclase, orthoclase, quartz, biotite, 

 hypersthene, «omphacite», and exceptionally of horn- 

 blende and garnet. The gabbro consists chiefly of plagio- 

 clase, besides pyroxene and biotite and some dial lage and 

 quartz. The bulk of the broncite- diabase is composed of 

 plagioclase and broncite besides magnetite and some 

 bio tile and apatite. 



^^ Meddelelser om Grønland IX, p. 237 and following pp. 

 *i Geolog. Foren, i Stockholms F«)rh. VIII (1886), p. 43î>. 



I* 



