Shallow seismic imaging of folds above the Puente Hills blind‐thrust fault, Los Angeles, California

• DOI: 10.1029/2001gl014313
• Publication Date: 2002-10-27T18:39:25Z
• Authors: Thomas L. Pratt; John H. Shaw; James F. Dolan; Shari A. Christof...; Robert A. Williams; Jack K. Odum; Andreas Plesch
• Keywords: Echelon formation; Thrust fault

High‐resolution seismic reflection profiles image discrete folds in the shallow subsurface (<600 m) above two segments of Puente Hills blind‐thrust fault system, Los Angeles basin, California. The demonstrate late Quaternary activity at tip, precisely locate axial surfaces within upper 100 m, and constrain geometry kinematics recent folding. Santa Fe Springs segment zone shows an upward‐narrowing kink band with active anticlinal surface, consistent fault‐bend folding thrust ramp. Coyote synclinal surface that coincides base a 9‐m‐high scarp, tip‐line or presence backthrust. pinpoint targets for future geologic work to slip rates ages past events on this important system.