Quaternary stratigraphy and geologic evolution of Ojai and upper Ojai Valleys, western Transverse Ranges, California

Abstract

Ojai and Upper Ojai valleys are intramontane basins in the western Transverse Ranges filled with strata that have recorded the uplift of surrounding ranges, evolution of the drainage system, and landscape development since mid Quaternary time. A combination of careful mapping and stratigraphic description of exhumed strata combined with subsurface water- and oil-well data document the late-Quaternary provenance changes, depositional settings, and geometry of the basin fill. (See more in text.)