GEOLOGY 210 



Murch. type, a peculiar Pentameride, Terebratula cfr. Die- 

 lasma, Pterinea sp., Modiolopsis sp. Lucina sp. div., Bellero- 

 phon sp., Platyceras sp., Orthoceras sp., Gomphoceras, gigantic 

 nautilus and ganoid scales.' 



' The fauna in DC is merely a repetition, and in the case of 

 certain species, a further development, of the forms found in 

 Db. It will thus be seen that there is a spring in regard to the 

 fauna between the upper layers in Series B and the lower ones 

 in Series D, which more particularly resemble Lower or Middle 

 Devonian. The concordantly embedded (?) Series C might, 

 therefore, be thought to represent uppermost Silurian as well as 

 lowest Devonian.' 



' Divisions Dd and Df are poor in fossils, and are partly shale 

 divisions. In the impure limestone of Dg occur again numerous 

 fossils, among which are Atrypa reticularis, Rhynchonella cfr. 

 cuboides, Spirifer cfr. undifera, Productus sp., Terebratula cfr. 

 Dielasma, Pterinea sp., Avicula sp., Modiolopsis sp., Pleuroto- 

 maria sp., Proetus sp. Traces of placoderm fish are also met 

 with. Above these strata are beds of purer limestone Dh, and 

 above these again some less pure, Di. The uppermost strata of 

 Di alternate with strata of light-gray quartz-sandstone terminat- 

 ing in a clay-sandstone, which in places is richly fossiliferous, 

 though the fossils are in a bad state of preservation. Among 

 these are lamellibranchiata, Dechenella sp., remains of Holo- 

 ptydiius, &c.' 



' This argillaceous sandstone is simultaneously the last link 

 in Series D and the first in Series E. This is a huge collection 

 of quartz-sandstone strata building up the mountains on both 

 sides of the inner part of Gaasef jord. The lowest part, which 

 is 900 to 1,200 feet in thickness, consists almost exclusively of 

 quartz-sandstone. On the north side of Skrabdalen, in the 

 sandstone profile, occur conglomerate strata, half an inch to an 

 inch in thickness. In these were found considerable remains 

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