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Swiss Journal of Geosciences
Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: Microstructural characterization of natural fractures and faults in the Opalinus Clay: insights from a deep drilling campaign across central northern Switzerland

Fig. 3

Overview of analysed structure types. The upper part presents the five types of macroscopically described structures with fault zones representing composite zones constituted by various natural fracture types (see Fig. 4). The lower part shows the types of microscopically analysed “veins” (tension gashes and mineralized fault planes) including the microstructural texture and approximated average vein width

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