Geology of the Los Angeles Basin, California: an introduction

摘要: The physiographic basin is underlain by a deep structural depression; the buried basement surface has relief of as much 4.5 miles in distance 8 miles. Parts this depression have been sites discontinuous deposition since late Cretaceous time and continuous subsidence middle Miocene time. In depositional extended well beyond margins present- day basin. term ''Los Angeles basin'' refers herein to larger area. evolution interpreted 5 major phases, each which represented distinctive rock assemblage--the predepositional phase rocks, prebasin upper lower basin-inception principal Pleistocene disruption Recent deposits. Los California's most prolific oil- producing district proportion its size: at end 1961, cumulative production (5,035 billion bbl) was nearly half that California's. (103 refs.)