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第四纪地质学家们正在继续探寻表示出２．４Ｍａ以来古气候和其它环境变动的沉积记录。在过去１０年，利用加速器质谱仪能够对极小样品作精确的测年，这有助于对一些含碎屑有机质的第四纪沉积记录进行再分析。１ 冰心和海洋记录近年来，取自格陵兰的冰心记录和北大西洋的沉积?
Quaternary geologists are continuing to search for sedimentary records showing paleoclimatic and other environmental changes since 2.4 Ma. In the past 10 years, accurate mass dating of very small samples using an accelerator mass spectrometer has helped reanalysis of some Quaternary sedimentary records containing detritus and organic matter. Bing Bing and Ocean Records In recent years, Bing Xin recorded from Greenland and the North Atlantic sediments?