Author: Hugh McLean
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 20
Book Description
Distribution and Juxtaposition of Mesozoic Lithotectonic Elements in the Basement of the Santa Maria Basin, California
Author: Hugh McLean
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 20
Book Description
Distribution and Juxtaposition of Mesozoic Lithotectonic Elements in the Basement of the Santa Maria Basin, California
Author: Hugh McLean
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 20
Book Description
Distribution and Juxtaposition of Mesozoic Lithotectonic Elements in the Basement of the Santa Maria Basin, California
Author: Hugh McLean
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 12
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 12
Book Description
U.S. Geological Survey Bulletin
Author: Colin F. Williams
Publisher:
ISBN:
Category : Argillite
Languages : en
Pages : 212
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.
Publisher:
ISBN:
Category : Argillite
Languages : en
Pages : 212
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.
U.S. Geological Survey Bulletin
Miocene Extension and Post-Miocene Transpression Offshore of South-central California
Author: Christopher C. Sorlien
Publisher:
ISBN:
Category : Basins (Geology)
Languages : en
Pages : 74
Book Description
Publisher:
ISBN:
Category : Basins (Geology)
Languages : en
Pages : 74
Book Description
Sedimentology of the Conglomeratic Lower Member of the Lospe Formation (Lower Miocene), Santa Maria Basin, California
Author: Samuel Y. Johnson
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 40
Book Description
Monthly Catalogue, United States Public Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1384
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1384
Book Description
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1388
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1388
Book Description
New Publications of the Geological Survey
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 746
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 746
Book Description