tephrochronological

tephrochronology

[tef-roh-kruh-nol-uh-jee]
noun Geology.
a geochronologic technique based on the dating of layers of volcanic ash.
Compare tephra.


Origin:
1940–45; < Swedish tefrokronologi, equivalent to tefr(a) volcanic ejecta (< Greek téphra ash) + -o- -o- + kronologi chronology

tephrochronological [tef-roh-kron-l-oj-i-kuhl] , adjective
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