This implies that they have close affinity, and probably are derived from same metamorphic basement with a crust formation age of late Paleoproterozoic.
表明它们具有明显的亲缘关系，可能来源于具有古元古代晚期地壳形成年龄的同一变质基底。
Granitic gneiss is the most extensive geologic unit in the Sulu ultra-high pressure metamorphic belt and the age of protoliths of granitic gneiss is Neoproterozoic era.
花岗质片麻岩是苏鲁超高压变质带中分布最为广泛的岩石单元，其岩石形成于新元古代。
The Longshoushan Group of Paleoproterozoic age in the Dongdashan district is a metamorphic terrane composed of metamorphic rocks of amphibolite facies.
东大山地区龙首山岩群形成于早元古代，是一套经角闪岩相变质改造的变质地质体。
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