However, the environment had such rapid and severe changes in the short period of time that the cold period changed into the warm period in the several hundred years in the last glacial age called the late glacial stage approximately from 13,000 to 10,000 years ago.
しかし、最後の氷期である晩氷期と呼ばれる約1万3000から1万年前の気候は、数百年で寒冷期と温暖期が入れ替わるほどで、急激な厳しい環境変化が短期間のうちに起こった。