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Arbeitsbericht NAB 19-14

Lithostratigraphy of Consolidated Rocks expected in the Jura Ost, Nördlich Lägern and Zürich Nordost Regions

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As a work aid for recording the drill cores of the current campaign, the names and definitions of stratigraphic units to be used were compiled. The compilation is based on the valid definition and nomenclature of the Swiss Committee for Stratigraphy (SKS) and comprises the expected solid rock formations from the Permian to the Miocene. Additions and deviations from the Swiss Lithographic Scheme are introduced where, according to current knowledge, the units recognised by the SKS (including informal units accepted as "in use") are not valid or do not reflect the expected succession. This applies in particular to the insufficiently known formations of the Middle Jurassic in north-eastern Switzerland, i.e. the Nördlich Lägern and Zürich Nordost siting regions. There, the proposed lithostratigraphy largely follows the concepts formulated in previous Nagra work reports (Nagra Arbeitsberichte).

The manual is based on the state of knowledge before the start of the current drilling campaign. The insights from the campaign are expected to improve the knowledge especially on the local lithostratigraphy of the Middle Jurassic and to potentially be integrated into the formal Swiss Lithographic Scheme.

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