The work is a summary of geological material obtained in the summer of 2002 during the study of a new geological training ground in Karelia. The description of the stratigraphic subdivisions of the Jatulian horizon of volcanic rocks of the Girvas settlement is presented, the research on the basin depth and composition of volcanics according to the TAS diagram is given. The results obtained can be used for further detailed studies not only in Karelia and northeastern Scandinavia, but also in other areas of the globe.
