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tephrochronology

[tef-roh-kruh-nol-uh-jee] /ˌtɛf roʊ krəˈnɒl ə dʒi/
noun, Geology
1.
a geochronologic technique based on the dating of layers of volcanic ash.
Compare tephra.
Origin of tephrochronology
1940-1945
1940-45; < Swedish tefrokronologi, equivalent to tefr(a) volcanic ejecta (< Greek téphra ash) + -o- -o- + kronologi chronology
Related forms
tephrochronological
[tef-roh-kron-l-oj-i-kuh l] /ˌtɛf roʊˌkrɒn lˈɒdʒ ɪ kəl/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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