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。
2
Typical metamorphic pillow basalt is widely distributed in the Liuhang "Formation" of the Taishan "Group", west of Tuanyuangou village, Zhangqiu, western Shandong Province.
鲁西泰山岩群柳杭岩组中，典型变质枕状玄武岩出露在济南章丘的团员沟村西一带。
3
Therefore, the extensional movement is also one of the mechanisms for controlling formation of the unifying metamorphic basement and sedimentary cover.