稳定性和活动性是在空間方面划分大地構造單位的最重要标誌;褶皺硬化时期也就是活动区轉向稳定区时期的銜接点,是在时間方面划分大地構造單位的最重要标志。因此从空間方面看来,根据稳定性、活动性綜合考虑并以沉积厚度、岩相建造变化、褶皺錯动情况、岩漿活动、变質程度以及矿产分布特征等現象出发,地 Stability and activity are the most important symbols for the division of geotectonic units in space. The period of fold hardening, that is, the transitional period from the active zone to the stable zone, is the most important indicator for the division of the tectonic units in terms of time. Therefore, from the perspective of space, based on the comprehensive consideration of the stability and activity, and based on the phenomena of sedimentary thickness, lithofacies-making changes, fold dislocation, magmatism, metamorphism and mineral distribution,