Oligocene tectonics and sedimentation, California

New Records of Eutherian Mammals from the Goler Formation (Tiffanian, Paleocene) of California and Their Biostratigraphic and Paleobiogeographic Implications

“…PaleoBioGeoGraPHy strata that comprise the Goler Formation were deposited within a tectonically active area, just east, and inland from a complex forearc basin developed during subduction of the Farallon Plate, when plutonism driven by subduction had largely terminated in California (Nilsen, 1987). There is no consensus on what tectonic forces controlled development of the Goler Basin.…”

“…There is no consensus on what tectonic forces controlled development of the Goler Basin. Hypotheses range from a supradetachment basin formed when the southernmost sierra Nevada Batholith was unroofed by extensional faulting during the late Cretaceous-Paleocene saleeby, 1997, 1998), to a fault-bounded basin formed within a northeast-trending tectonic trough that lay on the northern edge of the Mojave Desert block (Cox, 1987;Nilsen, 1987). as the Goler Basin formed, locally derived sediments (member 1 and member 2) covered parts of the basin floor and then were overlain by strata (member 3) deposited on a southern sloping piedmont from a source located within a mountainous region on the basin's northern margin (Cox, 1987).…”

Summary of geology and petroleum plays used to assess undiscovered recoverable petroleum resources of Los Angeles Basin Province, California

“…LA = Los Angeles. 4 represent a late Oligocene low-stand of sea level and possibly the earliest stage of regional uplift, faulting and subsidence caused by this new transform regime (Yerkes and others, 1965;Ingle, 1973;Crowell, 1974;Truex, 1976;Yerkes and Campbell, 1979;Schoellhamer and others, 1981;Nilsen, 1984;Mayer, 1987).…”

Volcanic rocks of the Santa Maria Province, California; Age and tectonic inferences from a condensed(?) succession of Upper Cretaceous, Paleocene, and Eocene strata, Big Pine Mountain area, Santa Barbara County, California

“…Consequently, a borderland-like configuration of basins and ridges cannot be fully ascertained. Highly generalized, regional paleogeographic reconstructions (Howell, 1975;Nilsen and Clarke, 1975;Nilsen, 1987), however, indicate that Paleocene and Eocene borderland features were present. Although faultbounded ridges of this age have not been identified, precursors of the Little Pine and Camuesa faults ( fig.…”

“…Late Cretaceous and Paleogene sedimentation was largely on submarine fans that developed during the unroofing of mid-Cretaceous granitoid plutons in neighboring continental terranes to the east (Page, 1970;Howell and others, 1977;Lee-Wong and Howell, 1977;Vedder and others, 1983). Regional tectonic events that influenced these late-stage forearc depositional systems included oblique subduction, terrane accretion, and likely strike-slip deformation (Page and Engebretson, 1984;Nilsen, 1987).…”