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.
チバニアンは千葉県にちなんで名付けられた地質時代です。
The Chibanian is a geological age named after Chiba Prefecture.
この地層はチバニアンの始まりを示す
This stratum is the international type locality marking the beginning of the Chibanian.