Data used in the paper entitled: "Hidden faults: the Late Pleistocene transpression of the Königssee–Lammertal–Traunsee Fault inferred from caves deformation (Eastern Alps)"

<p><strong>Manuscript Abstract:&nbsp;</strong>The Eastern Alps have undergone lateral extrusion since the late Oligocene, with major crustal-scale strike-slip faults still active, as evidenced by earthquakes up to M6, despite scant geological record. Research has focused more on the Salzach-Ennstal-Mariazell-Puchberg (SEMP) and Mur-M&uuml;rz faults, leaving the central part of the Northern Calcareous Alps cut by the 110 km long K&ouml;nigssee&ndash;Lammertal&ndash;Traunsee (KLT) fault system under-studied. We took advantage of a cave environment isolated from erosion, providing unparalleled structural indicators exposure to fill the Pleistocene deformation history gap of the KLT. We reconstruct paleostress for 26 reverse, strike-slip, and oblique reactivated faults that offset passages in seven caves close to sinistral KLT and dextral Lammertal faults. ²³⁰Th/U dating of faulted and broken speleothems revealed two reactivation events since the Middle Pleistocene. The older event dates can be constrained to 331 (+89/-54) to 287 &plusmn; 6 ka, or 297-281 ka if the KLT and Lammertal faults were reactivated simultaneously. The younger event occurred between 130 and 90 ka, aligning with fault reactivations in the eastern Alps.</p> <p>Cave observations allowed us to analyze reverse faults in the positive flower structure of the KLT and mode I fracture with minor antithetic dextral slip, suggesting a sinistral component of regional rejuvenation. Our findings indicate that the KLT was reactivated due to simple shear with NNE compression. Along the Lammertal fault, we recorded a strike-slip regime driven by NNW compression. The KLT and Lammertal faults form a system of conjugated shears that efficiently accommodate N-S shortening compared to the SEMP fault, which is perpendicular to the compression. Combining our neotectonic data with current seismicity shows that the KLT plays a key role in the Quaternary extrusion process in the studied Alpine sector, surpassing the more prominent SEMP fault.</p> <p><strong>In this dataset, we make available:</strong></p> <p>iPhone13Pro LiDAR scan of the two cave passage offsets: one in the Dependance cave and Gamssteig cave</p> <p>PDF file with dated sample location and description</p> <p>&nbsp;</p> <p>Published in:</p> <p><strong>Szczygieł, J., Plan, L., Hellstrom, J., &amp; Grasemann, B. (2024). Hidden Faults : The Late Pleistocene Transpression of the K&ouml;nigs- see &ndash; Lammertal &ndash; Traunsee Fault Inferred from Caves Deformation ( Eastern Alps ). Lithosphere, (Number Special 15), lithosphere_2024_177, 14. https://doi.org/10.2113/2024/lithosphere</strong></p> <p><strong>This research was founded by the NCN Polish National Science Center [grant No 2020/39/D/ST10/00615]</strong></p>