Fra høifjeldsstrøget mellem Haukeli og Hemsedalsfjeldene

Abstract

Foredrag: This mountainous region is situated between latitudes 59\u00B0 50' and 61\u00B0 N in the highest parts of the country. In 1900 Reusch, Bjørlykke and the writer surveyed the western and southern parts of this district towards Hardanger and Røldal. The adjacent region, to the east, is treated in the present paper. The annexed map showa the chief geological divisions. The continuous red colour designates a granite, which is younger than the Telemark formation (Algonkian) and older than the Cambrium. This granite has a large occurrence here. At the base of the Hallingskarv there are two small portions of the Telemark formation (hachured red and black on the map), which consist of greyish quartzite. The green colour on the map designates the Cambro Silurian Strata. The lower part of these consists of black or dark grey phyllite, which is a metamorphosed alum-schist. In the uppermost strata of this black schist, in two places, Holberget and Dvergsminut, Dictyonema flabelliforme, is found, which indicates the horizon of the upper Cambrium. Besides this, traces of trilobites are also found in these black schists. The Cambrian strata here, lie unconformably on the Telemark formation (Algonkian), and on the whole they have a thickness of 30-50 m. Above the black schists there frequently lies a dark bluish quartzite (Blåkvarts) about 30-60 m in thickness.