Definition of tephrochronology in English:

tephrochronology

noun

Geology
  • [mass noun] The dating of volcanic eruptions and other events by studying layers of tephra.

    • ‘To introduce students to tephrochronology as a means of correlating marine, ice and terrestrial proxy records of palaeoenvironmental change.’
    • ‘These deposits are important because they permit both increased dating resolution in areas close to volcanoes and the use of tephrochronology over very long distances.’

Pronunciation:

tephrochronology

/ˌtɛfrə(ʊ)krəˈnɒlədʒi/