Proterozoic erathem的用法和樣例：
例句
- The Miaogou boron deposit occurs in granulitite of Liaohe group,lower proterozoic erathem,locating at Daxicha village,Kuandian town,Liaoning.
遼寧寬甸大西岔鄉廟溝硼礦賦存於下元古界遼河群含硼變粒岩層位。 - Conglomerate of the Middle Proterozoic Tietonggou Formation is in unconformity relation with the plagioclase schist of the Archean Taihua Group.
中元古界鐵銅溝組礫岩，礫石形態多樣，與下面的太古界太華群斜長片岩呈角度不整合接觸。
