Exploration system of the Leningrad oil shale deposit

Abstract

The Leningrad oil shale deposit is located in the west of the Leningrad Region and is the eastern part of the Baltic oil shale basin. The industrial oil shale bed (promplast) lies in the lower part of the Kuker stratigraphic horizon of the Middle Ordovician and consists of four convergent layers of oil shale, separated by interlayers of limestone ...