Ecology and Paleoecology of Some California Foraminifera. Part II. Foraminiferal Evidence of Subsidence Rates in the Ventura Basin

Data from the Wheeler Canyon section of the Ventura Basin show evidence of a much greater rate of subsidence than filling in early Pliocene time; perhaps some uplift followed by about equal rates of subsidence and filling during middle Pliocene time; considerable subsidence accompanied by about an equivalent amount of filling in the late Pliocene time; and an initial uplift followed by some subsidence and complete filling of the basin in the early Pleistocene