tephro-

(Greek: ash-gray; volcanic material such as ash, dust, cinders, etc.)


tephra
tephrite
tephritic
tephrochronological (adjective) (not comparable)
Referring to a geochronological technique: At the site of the volcano, Jim used tephrochronological methods to date the different layers of the volcanic ash.
tephrochronology (s) (noun) (not comparable)
The dating of volcanic eruptions and other events by studying layers of tephra: The geochronological method of tephrochronology utilizes individual layers of volcanic ash from one eruption to form a system whereby archaeological records can be categorized. .
tephroite