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。