Fault-related fold kinematics recorded by terrestrial growth strata, Sant Llorenç de Morunys, Pyrenees Mountains, NE Spain

摘要: Abstract Foreland basin growth strata are ideal recorders of deformation rates and kinematics in tectonically active regions. This study develops a high-resolution chronostratigraphic age model to determine folding the Eocene-Oligocene terrestrial Berga Conglomerate Group, NE Spain. The Group was sampled for rock magnetic, magnetostratigraphic, magnetic susceptibility (χ) cyclostratigraphy analyses. Analysis measurements indicate mixed mineral assemblage with both paramagnetic ferromagnetic minerals. A new reversal stratigraphy constrains time frame is agreement previous interpretations. Time series analysis χ variations show statistically significant power at expected orbital frequencies provides precession-scale (20 kyr) temporal resolution. Strain including anisotropy (AMS) fabrics bedding plane strain worm burrow distortion consistent fixed hinge, flexural kinematics. Fault-related modeled using timing measurement kinematic constraints. onset 33.85 Ma end less constrained but younger than 31.06 Ma. Deformation sediment accumulation unsteady 20 kyr scales appear artificially steady polarity chron scales.