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Author Piper, David Z., author.

Title Cooccurrence of Fe-, Fe-Ca-, and Ca-phosphate minerals in concretions within the Monterey Formation : a record of uplift of the Santa Maria Basin, California / by D.Z. Piper, C.M. Isaacs, and M.D. Medrano.

Publication Info. [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1993.
Washington : United States Government Printing Office

Copies

Location Call No. OPAC Message Status
 Axe Federal Documents Online  I 19.3:1995-C    ---  Available
Description 1 online resource (iii, 15 pages) : illustrations, map.
text txt rdacontent
computer c rdamedia
online resource cr rdacarrier
Series Evolution of sedimentary basins/onshore oil and gas investigations--Santa Maria Province ; ch. C
U.S. Geological Survey bulletin ; 1995-C
Evolution of sedimentary basins/onshore oil and gas investigations--Santa Maria Province ; ch. C.
U.S. Geological Survey bulletin ; 1995-C.
Bibliography Includes bibliographical references (pages 13-15).
Summary 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.
Note Description based on print version record.
Access Use copy Restrictions unspecified star MiAaHDL
Reproduction Electronic reproduction. [S.l.] : HathiTrust Digital Library, 2011. MiAaHDL
System Details Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212 MiAaHDL
Processing Action digitized 2011 HathiTrust Digital Library committed to preserve pda MiAaHDL
Subject Phosphate minerals -- California -- Santa Maria Basin.
Geology, Stratigraphic -- Miocene.
Geology -- California -- Santa Maria Basin.
Monterey Formation (Calif.)
Geology. (OCoLC)fst00940627
Geology, Stratigraphic. (OCoLC)fst00940727
Miocene Geologic Epoch. (OCoLC)fst01353827
Phosphate minerals. (OCoLC)fst01061340
California -- Monterey Formation. (OCoLC)fst01249216
California -- Santa Maria Basin. (OCoLC)fst01257500
Chronological Term From 10 to 25 million years ago
Genre/Form Electronic government information.
Electronic books.
Added Author Isaacs, Caroline M., author.
Medrano, M. D., author.
Geological Survey (U.S.), issuing body.
Other Form: Print version: Piper, David Z. Cooccurrence of Fe-, Fe-Ca-, and Ca-phosphate minerals in concretions within the Monterey Formation (DLC) 92028029 (OCoLC)26309279
Gpo Item No. 0620 (online)
Sudoc No. I 19.3:1995-C

 
    
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