Photo de stock - 01 August 2023, Bavaria, Ludwigsstadt: The upper rock layer consists of Silurian shale, with a light-colored layer in between. According to the Bavarian State Office for the Environment (LfU), geologists came across a 443-million-year-old layer in the shale rock during construction work on a road embankment. Photo: Daniel Vogl/dpa. - Ludwigsstadt/Bavaria/Germany

Photo de stock: 01 August 2023, Bavaria, Ludwigsstadt: The upper rock layer consists of Silurian shale, with a light-colored layer in between.

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