The Eocambrian "Reusch moraine" at Bigganjargga and the geology around Varangerfjord, Northern Norway.

Abstract

The Bigganjargga Tillite (Reusch moraine) of N. Norway rests on a striated surface of the underlying sandstone (Tana Group). This unconformity can be followed on both sides of the Varangerfjord and can be correlated with a similar slight angular unconformity below the Lower Tillite (Smalfjord Tillite) at Tana (Føyn 1937). The described sections through the latest Precambrian and Eocambrian of N. Norway show many lithological similarities to the corresponding sections in S. Norway and Scotland. The palaeoclimatic implications of the regional distribution of Eocambrian tillites are discussed, and it is concluded that the Eocambrian glaciation probably was more extensive than any other known glaciation.