完整的斑状斑状橄榄石玄武岩和火山碎屑岩是最近火山活动的更新世的组成部分。
The holocrystalline porphyritic olivine basalts and pyroclastic rocks are the components of Pleistocene to recent volcanic activities.
造成晚更新世时期两岩芯沉积相的差异主要与断裂构造的升降运动有关。
The different sedimentary environment at late Pleistocene was mainly due to vertical motion of fault block.
海南岛西北岸有晚更新世以来二期火山活动，共5次喷发，沿海岸密集的火山喷发孔、岩流堆积，构成了独特的海蚀型火山港湾岸。
There have been two periods of volcanism with 5 eruptions in the area of northwestern Hainan Island. The first one occurred in late Pleistocene, dating back to 5.2X104 a B.
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