Karl Petter sen — Geology of N. Norway. 389 



designated as Taconic). The thickness of the group is considerable, 

 but cannot at present be ascertained. 



IV. — The Alten and Kvoenangen group (the Eaipas system, Tellef 

 Dahll) appears most developed at the bottom of the Altenfjord in * 

 West Finmark, always in wider and narrower stripes towards the 

 bottoms of several of the fjords of East Finmark. In the Amt of 

 Tromso it appears along the interior of Kvoenangen well developed, 

 on the island Vanna, in the parish of Karlso, and again in several 

 places on the mainland ; but here it is generally quite subordinate. 

 The series of strata of the group is formed of black, green, red, and 

 violet argillaceous slate, quartzite and reddish sandstone. The most 

 significant link is, however, a yellowish-white magnesian lime- 

 stone (Dolomite), which occurs in layers, and in some places may 

 attain a thickness of up to 30 metres. The slate tracts of the group 

 are often traversed by veins of red haematite (Iron mica) . There is, 

 moreover, a deposit of copper ore (copper pyrites and variegated 

 copper ore, erubescite) connected with this group, but specially only 

 in the characteristic greenstone formations, which frequently traverse 

 the strata. The mining fields of Kaafjord and Kvoenangen are thus 

 traversed by veins of quartz and lime traversing the greenstone. 



The position of the layers in the group is most frequently charac- 

 terized by strong sinuosities and contortions. The thickness of the 

 series of layers cannot therefore be determined with any great 

 degree of accuracy. Neither have any petrifactions been found in 

 this group. The age is probably Silurian (or Devonian) . 



V. — The Golda group (the Gaisa system, Tellef Dahll) appears as 

 the final link completing the rock foundation in large connected 

 tracts in East and West Finmark, and can moreover be traced down 

 through the interior of the "Amt" of Tromso, along the frontier of 

 the realm towards the south to Ovre Eostavand. The series of strata 

 is formed of clay and argillaceous mica-slate, mica-slate, quartz-slate, 

 and sandstone quartzite, and moreover of yellow and red sandstone, 

 which completes the series. Mayings of limestone are, so far as 

 has hitherto been ascertained, entirely wanting. The mica-slate may 

 in some places be richly sprinkled with small red garnets. No other 

 accessory component parts have been observed. 



At Bescades —a mountain tract along the Alten river — there appear 

 a few thick layers of tolerably pure graphite (Tellef Dahll) . On 

 account of the absence of petrifactions-, the age of the group cannot 

 at present be accurately determined. It is perhaps Devonian. 



The groups of the Secondary period are here quite unrepre- 

 sented, — a locally occurring section of the Jura formation at Ando 

 in Vesteraalen only excepted. Neither is there here any represen- 

 tative of the Tertiary formation. On the other hand, there are in 

 several places formations from the Quaternary period along the beds 

 of rivers and channels, consisting of layers of clay and sand, which 

 contain numerous remains of the shells of species of Molluscs which 

 are all now living on our coasts and in our fjords. These formations 

 are observed up to an elevation of about 60 metres above the present 

 level of the sea. The formations of the Quaternary period are com- 



