On the petrographic composition of some rocks on the northern coast of Lake Ladoga

Abstract

In spring 1907 and 1908 the authors of this note participated in a geological excursion along the northern coast of Lake Ladoga. The excursion began with an examination of the Imatra waterfall and the surrounding rocks with characteristic signs of the Ice Age. From Imatra we drove to the city of Serdobol and from here we set off on foot along the shore of Lake Ladoga, getting acquainted along the way with the rocks of this area and with two ore deposits, Velimeki and Pitkaranta, which was the final destination of our trip. Without having in mind a description of all the material, for our brief note we selected only rock samples that we took along the way from the town of Serdobol to the Velimeki iron mine inclusive, the most interesting from a petrographic point of view.