复州区金县群新观察

复州区金县群出露子复州城西瓦房、复州湾五行山和赵坎子地区。复州区金县群的剖面结构和地层特征和金州区金县群基本一致,其中十三里台组、马家屯组不仅岩性基本相同,而且含相同的叠层石组合,这表明复州—大连凹陷在晚先寒武纪时期为同一海盆地。复州区袁家沟—赵坎子一带缺失马家屯组以上沉积,寒武系大林子组直接覆于其上,表明复州湾区地壳曾一度抬升,出现了两凹夹一中隆的构造格局。

NEWLY-OBSERVED ON JINXIAN GROUP IN FUZHOU AREA

Jinxian Group in Fuzhou area crops out in the areas of Fuzhoucheng, Xiwafang,Fuzhou Bay, Wuhangshan, and Zhaokanzi. With regard to profile structure and strati-graphical characteristics, it is basically identical with that in Jinxian. They containthe same stromatolite assemblage. These show that Fuzhou sag and Dalian sag arethe same sea basin in late Precambrain. The zone from Yuanjiagou to Zhaokanzi inFuzhou is short of sedimentary above Majiatun Formation, and covered directly byDalinzi Formation in Cambrain. It shows that the crust in Fuzhou Bay area once roseup and formed the struction which a median fold stands between two sags.