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    Fossil Wood from the Middle Miocene Conejo Volcanics, Santa Monica Mountains, California

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    Subject
    Fossil Wood; Middle Miocene Conejo Volcanics; Santa Monica Mountains; California
    Author
    Stadum, Carol J.; Weigand, Peter W.
    Journal Title
    Scas: Bulletin of the Southern California Academy of Sciences
    Volume
    98
    Issue
    scas/vol98/iss1; 1
    Metadata
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    URI
    https://scholar.oxy.edu/handle/20.500.12711/9447
    Abstract
    Evidence that the upper Conejo Volcanics erupted subaerially is con- <br /><br />firmed by the discovery of fossil wood preserved in a —13.5 Ma tuff breccia <br /><br />exposed on the northern flank of the Santa Monica Mountains, California. This <br /><br />middle Miocene wood represents a low montane geoflora of hardwoods and co- <br /><br />nifers that lived at elevations greater than 1,300 m. Ponderosa Pine, Douglas Fir, <br /><br />Incense Cedar, and specimens from the dicotyledonous families Fagaceae (ever- <br /><br />green and live oaks), Rosaceae (mountain mahogany), and Rhamnaceae (mountain <br /><br />lilac) have been identified by thin section analysis. Preservation of this wood <br /><br />varies from amorphous clayey limb casts to splintered surfaces and detailed cell <br /><br />features. This is the first record of fossil trees in a tuff breccia from the Los <br /><br />Angeles basin region.
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