2024

Köykkä, Juha; Ojala, Antti A. K.; Tarvainen, Timo

This volume is a revision of stratigraphic procedures and nomenclature in Finland. The articles provide practical guidance on the appropriate use of geological unit terminology in the Fennoscandian Shield area and Finnish perspectives on stratigraphy as a science. The first article by Kohonen et al. discusses the stratigraphic challenges typical for Precambrian shield areas, with the main emphasis on litho-based classifications. The authors present novel ideas regarding the efficient use of lithodemic units in map database structures. Additionally, the authors propose a new approach related to regional chronostratigraphic nomenclature. The second article is a completely revised edition of the ‘Guidelines and procedures for naming bedrock units in Finland’, with Juha Köykkä as the corresponding author. This new version aims to offer practical advice on the use of different bedrock unit classification systems in Finland, providing an update and revision of Strand et al. (2010). It also describes the current status regarding how various aspects of regional geology are covered by parallel but distinctly defined unit classifications. The final article by Lunkka et al. is the “Stratigraphic framework for the classification of Quaternary deposits in Finland”. This paper introduces practices for the mapping and classification of superficial Quaternary deposits in Finland. It is not a formal stratigraphic guide or a stratigraphic code (Salvador 1994), but aims at introducing applicable approaches and practices through which different classifications have been and are currently applied to benefit both scientific interests and more applied research in Quaternary geology.