S96 Geology of Scandinavia. 



should wish to assure ourselves of the fact by comparing toge- 

 ther good series of the rocks from the two countries. 



3. Euphotide and Serpentine RocJcs. — Euphotide rocks have 

 also been more than once mentioned as occurring in Norway and 

 Lapland. A part of these rocks were assuredly nothing else 

 than hypersthene-sienites, in which the hypersthene had been 

 mistaken for a diallage ; but do true euphotides not occur in 

 Norway ? It would be of importance to prove it. Serpentines 

 have been mentioned as occurring in Norway and Sweden.* It 

 is known, that there is a singular affinity between euphotides and 

 serpentines ; does an affinity of the same kind exist between the 

 hypersthene-sienites and certain serpentines, and is the substance 

 called serpentine the same in both cases ? It would be of im- 

 portance to prove it. 



4. Granite of RapaMvl. — Among the rocks to be examined 

 in the north, with reference to their composition, there is also 

 a species of granite called Rapakivi, which occurs in various 

 parts of Finland, and particularly, according to Acerby, two 

 miles to the north of Uleaborg. If there is an opportunity, it 

 would be right to make some carefully- formed collections of 

 it, by means of which all doubts relative to its composition 

 might be removed. 



5. Rock Formations of Christiania, ^c. — The environs of 

 Christiania present, as it were, a vast museum of rocks as beau- 

 tiful as they are various, whose mode of occurrence exhibits a 

 multitude of curious circumstances, and which are as well fitted 

 as the basalts and trachytes of Auvergne, to be taken as types 

 in the description of other countries. It will be extremely use- 

 ful to possess good collections of them. I shall mention parti- 

 cularly the melaphyres, the porphyries, and especially the zircon- 

 -sienite, of which M. de Buch remarked as being superimposed 

 nn a sedimentary formation. A section towards Sennesio shews, 

 says M. de Buch, the whole succession of these rocks. The 

 quarries of Aggers-Kirke are in large veins of melaphyre, and 

 in particular, of hypersthene-rocks. The innumerable and very 

 remarkable modifications of the melaphyres, are well seen in 

 crossing Krogskov from Rarum towards the Holsfiord. Epidote 



• Reise nach dem hohen Norden, von Vargas Bedeniar. Frankfurt, 1819. 

 Hisinger, Mineral ogische Geographie von Schweden. Freyberg, 1819. Vid. 

 also Goea Norwegica, Christiania, 1838. — Edit. 



