Author: Bruce A. BlackPublisher:
ISBN:
Category : Facies (Geology)
Languages : en
Pages : 82
Book Description
Geologic Guide of the Central Santa Clara Valley Sespe and Oak Ridge Trend Oil Fields, Ventura County, California
Author: Bruce A. BlackPublisher:
ISBN:
Category : Facies (Geology)
Languages : en
Pages : 82
Book Description
U.S. Geological Survey Bulletin
Author: U.S. Geological Survey Bulletin
Author: Colin F. WilliamsPublisher:
ISBN:
Category : Argillite
Languages : en
Pages : 214
Book Description
Phosphatic concretions occur within diatomite in the upper part of the Miocene Monterey Formation near Lompoc, Calif. Absence of disruption of fine laminar bedding in the associated sediment by the concretions shows that they formed after complete compaction of the enclosing sediment.The concretions exhibit a strongly concentric color, chemical, and mineralogic zonation. Many of them are composed of a nucleus in which vivianite is the dominant mineral. Amorphous ferric phosphate, mitridatite, and francolite are the dominant phosphatic phases in successive layers toward the surface of the concretions. Cd and As contents increase tenfold from the nucleus outward, reaching a maximum of 2,000 ppm, whereas Ni content, with a maximum of 720 ppm, and Co content show the opposite trend. This mineralogy and elemental composition favor accretion under conditions of continuously increasing Eh and pH, during uplift into the fresh-ground-water zone of the terrestrial environment. Shale-normalized rare-earth-element patterns, however, suggest a marine source for the elements biogenic debris consisting of opal-A, organic matter, and carbonates of the enclosing sediment.
Cenozoic Geology of the Simi Valley Area, Southern California
Author: Richard L. SquiresPublisher:
ISBN:
Category : Science
Languages : en
Pages : 280
Book Description
Miocene and Oligocene Petroleum Reservoirs of the Santa Maria and Santa Barbara - Ventura Basins, California
Author: Margaret A. KellerPublisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 424
Book Description
Conglomerates of the Upper Middle Eocene to Lower Miocene Sespe Formation Along the Santa Ynez Fault
Author: Jeffrey L. HowardPublisher:
ISBN:
Category : Argillite
Languages : en
Pages : 64
Book Description
Santa Barbara and Ventura Basins
Author: Arthur G. SylvesterPublisher:
ISBN:
Category : Foraminifera
Languages : en
Pages : 180
Book Description
Union List of Geologic Field Trip Guidebooks of North America
Author: Richard A. SpohnPublisher:
ISBN:
Category : Reference
Languages : en
Pages : 392
Book Description
Author: 
Author: