After collecting a sample of fresh spatter, a geologist is silhouetted against a fountain of molten lava spouting from Hawaii's Mauna Ulu.
夏威夷毛纳。乌庐(Mauna Ulu .)活火山喷发形成熔岩喷泉，采集样品的地质学家剪影。
The scientists determined that the depression was a volcanic vent, and the bright ring around it was pyroclastic, remnants of lava that had been spewed outward, much like a volcanic fountain on Earth.
科学家确定凹陷处是一个火山口，并且在它附近明亮的圆环是火山碎屑岩，是火山喷发出岩浆的残余，很象地球上的火山喷口。
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