火山灰、火山砾、火山块和火山弹。
加拿大地球物理学家 Tuzo Wilson意识到，如果一块在内部固定火山源上移动的表面板块形成了岛屿，就会导致岛屿年龄增加。
Canadian geophysicist Tuzo Wilson realized that this age progression could result if the islands were formed on a surface plate moving over a fixed volcanic source in the interior.
在几公里以外一块由木材厂家惠好公司管理着的土地上，在火山爆发后他们立即通过手工栽种了大量大约70英尺高的树。
A few miles away, in land managed by Weyerhaeuser, a timber producer, thick stands of trees laboriously planted by hand immediately after the eruption rise 70 feet tall.
研究者们拼凑了包括头骨，手掌，脚掌，上臂，腿和骨盆在内的125块骨骼碎片，并采集挖掘处上层和下层的火山土壤层测定年代。
Researchers have pieced together 125 fragments of bone - including much of her skull, hands, feet, arms, legs and pelvis - which were dated using the volcanic layers of soil above and below the find.
纳布诺是位于三块板块交接的位置东非大裂谷活跃带的一部分，在此区域，地壳非常薄，位于薄弱点的火山喷发频繁。
Nabro is part of the very active East African Rift, where three tectonic plates are pulling away from each other. As the Earth's crust thins in the region, volcanoes rise in weak spots.
从火山口喷发出的硫磺蒸汽硬化凝结后，就形成了那些闪着黄色亮光的硫磺岩块，矿工们小心翼翼的探到火山坑底，冒着生命危险搜集这些黄色亮块。
Miners tread down into the crater to collect blocks of bright-yellow sulfur, which forms when gaseous and molten sulfur emerges from fumaroles -- volcanic vents -- and hardens.
火山碎屑岩可见熔集块岩、熔角砾岩和熔结凝灰岩。
The volcaniclastic rocks can be seen as fused lumps, fused breccias and fused tuffs.
麦哲伦海山区MA、MC、MD、ME、MF海山的结壳基岩类型主要有玄武岩、火山碎屑岩，其次为灰岩和磷块岩。
The substrate is mainly basalt and volcanic clastic rock, and then limestone and phosphorite in seamounts MA, MC, MD, ME, MF from Magellan seamounts.
一块黑色的火山玻璃。
这些名为砾石的石器，是用另一块石头从火山玄武岩上敲下来的，具有锋利的刃。
The tools are known as cobbles, lumps of volcanic basalt Split by hitting them with another rock, leaving sharp cutting edges.
其实这是一块灰绿色的火山岩石，很漂亮的灰绿色，泪珠状，同时它更比现代斧头更加的多功能多用途。
It's in fact a piece of grey-green volcanic rock, a very beautiful grey-green, and it's in the shape of a tear-drop, and it's a lot more versatile than a modern straight axe would be.
结合区域火山活动和构造演化认为，该滑动构造为伸展背景下的掀斜断块型，其滑动时间为白垩纪—新生代。
Based on volcanic activities and tectonic evolution, it is suggested that the tilted fault block, sliding structures in extensional setting should be developed in Cretaceous to Cenozoic age.
括苍山火山岩区是由不同阶段、不同火山机构组成的火山构造组合体。总体的构造格局是隆起和断块。
The volcanic region in Kuocangshan district of Zhejing is the volcanic structure combinatorial body composed of different stages and different volcanic edifices.
与熔岩呈过渡的火山碎屑岩主要为角砾熔岩和集块熔岩。
The second rock is mainly breccia lava and conglomerate lava.
在圣海伦火山上，一块火山形成物正在喷云吐雾，仿佛活了一般。
On Mount St. Helens, a volcanic formation seems to come to life as it exhales a cloud of steam.
在圣海伦火山上，一块火山形成物正在喷云吐雾，仿佛活了一般。
On Mount St. Helens, a volcanic formation seems to come to life as it exhales a cloud of steam.
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