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于下元古界遼河群含硼變粒巖層位。 - 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巖，礫石形態(tài)多樣，與下面的太古界太華群斜長(cháng)片巖呈角度不整合接觸。
