En forekomst af kaolin og ildfast ler ved Dydland nær Flekkefjord

Abstract

Forkortet: The lower part of the Sire river in Southwestern Norway has the appearance of a fjord 4 km long. Not far from it is Jøsingfjord only 2 km long. The peninsula between these two fjords is as a whole rather low and consist of an almost endless number of small rounded knolls. The rock is norite. The farms are humble and the distances between them are long, woods do not occur. Across the peninsula from SE to NW there is a small valley. The breadth may be estimated at about 70 m and the height of the sides at about 30 m. The kao- lin occurs in the bottom of this valley. At some places the prevalent rock in it is a dyke of diabase, as shown in the diagram on p.100, where L signifies norite, D a dyke of diabase 5 m wide and II the kaolin. The kaolin occurs here in vein-like parts along the borders of the diabase and in the norite. The principal mass of the kaolin is found in the NW division of the said valley. No diabase has hitherto been found there but the bottom of the valley seems to consist of kaolin in its whole breadth. The two pictures nethermost on pp.100 and 101 are from here. At the places marked 1,2,3,4 diggings have been made. The rising ground behind the houses in the next drawing consists of kaolin. The section on p.101 is from the trench 2.