Predjama Fault in an abandoned quarry, Slovenia

3D Model

The Predjama Fault is one of Slovenia’s largest active faults. It is a NW-SE trending, right-lateral strike-slip fault. In this abandoned quarry, slickensides testify to the horizontal motion of the fault blocks. A wide shear zone has formed, in which the solid limestones have been crushed into smallest pieces by repeated fault motion.

Further reading: Grützner et al. (2021): Holocene surface rupturing earthquakes on the Dinaric Fault System, western Slovenia. SolidEarth Discussions. Moulin et al. (2016): The Dinaric fault system: Large‐scale structure, rates of slip, and Plio‐Pleistocene evolution of the transpressive northeastern boundary of the Adria microplate. Tectonics.