チバニアン

noun

Chibanian (geologic age)

A geological age spanning roughly 774,000 to 129,000 years ago, named after Chiba Prefecture, Japan, where the Global Boundary Stratotype Section and Point (GSSP) is located. Used in academic and scientific contexts.

• チバニアンは千ち葉ば県けんにちなんで名な付づけられた地ち質しつ時じ代だいです。

  The Chibanian is a geological age named after Chiba Prefecture.

• この地ち層そうはチバニアンの始はじまりを示しめす国こく際さい標ひょう準じゅん模も式しき地ちです。

  This stratum is the international type locality marking the beginning of the Chibanian.