小盖州剖面元古宙火山岩具有安山岩岩石成分，由熔结角砾岩、熔岩角砾岩及熔岩组成。
The Proterozoic volcanic rocks in Xiaogaizhou section is composed of rhyakkumulate, la-va breccia and lava with andesitic composition;
通过对火山岩岩石学特征分析，将火山岩岩相划分为火山角砾岩柑、火山熔岩相、火山灰相和火山沉积相。
The analysis of volcanic petrology indicates that the volcanic lithofacies can be divided into volcanic breccia, lava, ash and sedimentary ones.
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