A few comments on the history of the valley of the River Narew

Abstract

The author studied the species and age of tree-trunks in the bed of the River Narew. As a result of the investigations it was found that at a depth of 1.6–1.7 m fragments of alder (Alnus glutinosa Gaertn.) occur. The age of these wood pieces was established as 3800±70 years B. P. At a depth of 0.5 m however, the remains of an oak trunk (Quercus robur L.) were found and their age was found to be 1470±50 years B. P. The author is of the opinion that the alder trunks are from the subboreal period, whereas the oak remainders are from the neoboreal period.