Based on field observation and SHRIMP U-Pb zircon dating, the authors redefine the times of deposition of supracrustal rocks in western Shandong Province：1） Supracrustal rocks deposited during the Early Neoarchean （2.75～2.70 Ga）, including the Yanlingguan Formation and most of the lower part of the Liuhang Formation and the Mengjiatun Formation; and 2）supracrustal rocks deposited during the Late Neoarchean （2.55～2.525 Ga）, including the Shancaoyu Formation, the Jining Group, and the upper part and some of the lower part of the Liuhang Formation. They are different in rock association, metamorphism and deformation, with the banded iron formation belonging to the Late Neoarchean supracrustal rock. Western Shandong Province is the only terrane in the North China Craton where both early and late Neoarchean supracrustal rocks have been identified.
