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Filtering by: Creator Williams, Reginald Remove constraint Creator: Williams, Reginald Decade 1980-1989 Remove constraint Decade: 1980-1989 Subject Archaeological geology -- Northwest, Pacific Remove constraint Subject: Archaeological geology -- Northwest, Pacific

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  • The effects of the Mazama tephra-falls : a geoarchaeological approach

    Creator:
    Matz, Stephan E.
    Abstract:
    About 7,000 years ago two major tephra-falls blanketed the Pacific Northwest in volcanic ash. These two tephra-falls, identified as the Llao and climatic tephra-falls, were a part of the eruptive events that led up to the collapse of Mount Mazama to form Crater Lake in the southern Oregon Cascades. The...
    Resource Type:
    Masters Thesis
    Full Text:
    ) that was erupted range from 30 to 64 km3 (Williams and Goles 1968; Lidstrom 1972). Howell