I04 JOHAN KIÆR. M.-N. Kl. 



Upper Cambrian. The Cambrian strata have there a size of about 3700 m., 

 of which the lowest 1150 belong to the Lower Cambrian. 



It should be observed that we have here only with the upper part of 

 the Lower Cambrian exposed with its typical Olenellus fauna. 



Thus in this district the Lower Cambrian alone attains dimensions of 

 at least 3000 m., and consists of changing strata of sandstone, shales, 

 limestone and dolomites, and comprises a long series of fossil-bearing zones. 



If we compare with these the strata in Central Scandinavia it is clear 

 that our fossil-bearing Lower Cambrian zones can only be compared with 

 the very uppermost part of the American series isee following section). 

 The lower part may then quite naturally be compared with the Sparagmite 

 formation, the considerable dimensions of which now present no difficult}'. 



The sole difference is that in Scandinavia we see a different faciès 

 evolution, without remains of marine fauna. It seems reasonable to assume 

 that the Sparagmite formation, as previously suggested, is a continental 

 development of the the middle and older part of the Lower Cambrian. 



I have long held views of this nature^; and later on V. M. Gold- 

 schmidt- has mentioned various conditions that point in the same direction. 



The prominent desert explorer Johannes Walther"'^, who has had 

 opportunities of studying our Sparagmite formation, has also arrived at a 

 similar result, and also W. Werenskjold^, in his work on Søndre Fron. 

 In referring to the work of these investigators, I will only in conclusion 

 quote from the work of the last named: "It thus appears reasonable that 

 the sparagmite is deposited — partly in shallow water, pardy on flat land — 

 in large depressions in a comparatively dry continent; at least twice the 

 basin has been filled with water in which the finer shales could be depo- 

 sited. These variations, however, appear to have taken place with consider- 

 able regularity. As a somewhat analogous deposition in modern time we 

 may mention the filled flat land in West Turkestand; the famous well 

 profile at Ashaband shows that clay, sand and pebbles constantly alternate 

 with each other to a depth of 600 meters. The great rivers from the east 

 have constantly carried there mud and sand as by degrees the bottom sub- 

 sided. In a similar manner we may imagine that the Sparagmite was 

 deposited in a large basin that have been filled up with loose deposits as 

 by degrees the bottom subsided". 



^ See V.M.Goldschmidt. Profilet Ringsaker-Brøttum. (Norges Geol. Unders. Aarb., 1908, 



page 36.) 

 ^ Loc. Cit. page 36. 



3 Über Algonkische Geoteine (Zeitschr. D. Geol. Ges. Bd. 61, 1909). 

 ■* Søndre Fron (Norges Geol. Unders. Nr. 60, 19 11, pag. 52 — 53). 



