G1ESECk6 on the geology of GREENLAND. 333 



Titaniain-iron-ore is fouiil iti small layers, arul fiiic-gi'aaular 

 chroQiate of iron. The rock itself has a striking resemblance to 

 the zirkon-syenite, found at Friedrichswaern and other places in 

 Norway, and described by Von Bach, Esmark, and Ilausmann. 

 The neij^rhbourinor mountains have no trace of that rock. At 

 Narsak, in the vicinity of Baal's River, brown titanite, or brunon, 

 is found disseminated in syenite. 



Granular porphyritic syenite is found at Nunarsoit (Cape of 

 Desolation). Its stratification is not very distinct. It contains 

 very extensive beds of coarse-grained, tile-red felspar, and 

 common magnetic ironstone. 



7. Primitive Trap (Greenstone). — The islands which lie 

 between the 62° and 63° of latitude present a very complete 

 scries of the roc]j|s that belong to the Primitive Trap-formation. 

 The greenstone first appears at Sakkak and Ujorbik in the mouth 

 of Arksutsfiord, where clay-slate predominates ; and extends 

 from those islands towards the east, that is, to the continent of 

 Greenland, alternatino: with greenstone of a porphyritic sLructure 

 {jiorpliyrartiger Griinstein, of Werner), and green porphyry or 

 verde antico. Another rock of slaty texture, consi;jting of com- 

 pact felspar and hornblende, appears to be intermediate between 

 hornblende-slate and greenstone-slate ; it is here the only rock 

 which presents very distinct stratification. The greenstone-slate 

 covers uninterruptedly both the greenstone and the green por- 

 phyry, and appears to belong to the Transition Greenstone-forma^ 

 tion ; and perhaps the whole formation should be referred to it. 

 It probably extends farther to the interior of the continent, as the 

 fragments which are thrown out from the continental ice have 

 an appearance exactly similar. Variolite is found there in small, 

 roundish, rolled pieces. The greenstone, alternating with syenite, 

 is found upon gneiss and mica-slate on the large island Nunarsoit. 



8. Primitive Limestone, of fine-granular texture, is found only 

 in beds and rolled pieces, and occurs very seldom in Greenland. 

 Its beds are confined to gneiss and mica-slate, and it is mingled 

 with minute leaves of silver-white mica, seldom with grains of 

 quartz. It is generally accompanied by tremolite, asbestos, acty- 

 nolite, sahlite, and seldom with rock-cork. Thus situated, it 

 occurs at the Island Akudlek, at the Island Manetsok, at Kakar- 

 soit and Kangerluluk, mountains in the vicinity of Jakobs-havn 

 and Christians-haab, in Disko Bay. 



It is very surprising, that no vestige of Floetz limestone is 

 found on this vast coast ; nor does any petrifaction occur there. 

 Very distinct impressions of the Salmo arcticus \_Mallotus Grcen- 

 landicus, Cuvier], with its bones very little altered, occur in 

 detached pieces on the alluvial land, which are forming daily.* 

 In the uppermost sandstone, which belongs to the brown coal of 

 the Floetz ^Trap-formation, fragments of Fecten Islcuidicus are 

 found, which have undergone but little alteration. 



* See Mr. Watson's translation of Dr. M. Sars's " Papers on the Fossiliferous 

 *' Nodules ia the Tost-Tertiary Clays of Norway, &c.' Geol. Mag., vol. i,, 

 p. 158, &c. — Editor. 



