Two different volcanic ash-falls of Alleröd age in High Belgium

Abstract

In the last 15 years several authors have mentioned the occurrence of volcanic ash in high Belgium. Because different preparation techniques have been used, the quantitative results cannot be compared. Applying the same method to different ash layers, two volcanic ash-falls of Alleröd age are distinguished: the 'Brackvenn ash-fall' (14C age: 10 830 ± 45 a B.P.) and the 'Konnerzvenn ash-fall' (14C age: 11 030 ± 160 a B.P.).