noun
diluvial epoch; Pleistocene
Geological term for the Pleistocene epoch, often used in older or formal contexts. In modern geology, 更新世 (こうしんせい) is more common.
洪積層から化石が発見された。
Fossils were discovered in the diluvial formation.
この地域の洪積台地は農業に適している。
The diluvial upland in this area is suitable for agriculture.
From 洪 (flood, vast) and 積 (accumulate), referring to deposits from the biblical flood in early geological theories. The term is now largely replaced by 更新世 in modern scientific usage.