地ち質しつ年ねん代だい学がく

noun

geochronology

Scientific field that determines the age of rocks, fossils, and sediments, and establishes the geological time scale.

• 地ち質しつ年ねん代だい学がくは、地ち球きゅうの歴れき史しを編あむための重じゅう要ような手しゅ法ほうです。

  Geochronology is an important method for piecing together the history of the Earth.