有时，动物和植物被浸泡在焦油或流沙中，被困在冰或熔岩流中，或被迅速落下的火山灰吞没后被保存下来。
On occasion, animals and plants have been preserved after becoming immersed in tar or quicksand, trapped in ice or lava flows, or engulfed by rapid falls of volcanic ash.
图片右下角处，有一条界限清晰的熔岩流。
科学家们将从熔岩流中获取更多数据。
快！跑快点！难道你没看到熔岩流吗？
这些结果为我们提供了一个估计的熔岩流时间范围。
The results provide an estimated age range for the lava flows.
难道你没看到熔岩流吗？
在熔岩流单元中黑曜岩位于其顶部和底部。
The obsidian appears on the top and the bottom of lava flow unit.
火山喷发出来的熔岩流和岩石占了黄石公园的大部分地区。
Lava flows and rocks from volcanic eruptions cover most of the land area of Yellowstone.
经过了几百万年，火山及熔岩流才筑就了今天的冰岛。
It's taken millions of years for volcanoes and lava flows to build Iceland.
一些较大规模的火山喷发可以形成绵延数英里的熔岩流。
The lava released in a major eruption mates searing flows that stretches for miles.
在7000多万年时间内，类似的熔岩流造就了一座座夏威夷岛屿。
Similar flows of molten rock have built up the Hawaiian islands over the course of more than 70 million years.
当非常黏滞的稠密熔岩流经陡峭的地表时，就形成了熔岩流。
Coulees are formed from highly viscous, thick lavas that flow onto a steep surface.
“如果你知道辐射率，你可能就能够明确地指出熔岩流的年代，”他解释说。
“If you knew that rate, you could pinpoint precisely how old the lava flows are, ” he explained.
胡德山顶终年积雪，经夏不消。 古代熔岩流留下条条石头河，深入周边的森林。
Snow persists on Mt. Hood’s summit, even at the end of summer, and old lava flows leave rivulets of rock running deep into the surrounding forest.
在黄石火山爆发最有可能的类型，到处是安全，除非在推进熔岩流附近。
For the most likely type of volcanic eruption in Yellowstone, everywhere would be safe except in the immediate vicinity of the advancing lava flow.
当熔岩流冷却时遇到了基层的岩石，刚好又是该地区的寒冷天气就构成了这些石柱。
The columns formed when cooling lava flows met bedrock and the region’s cold weather.
造成地球版块移动的，是地球表面下的熔岩流，这一部分也被称作地幔。
The action is driven by convection currents beneath the plates, in the molten part of the earth, or the mantle.
熔岩流剖面气孔特征呈层状分布，越接近顶部气孔越大越多，变形越明显；
The closer to the top of lava flows, the more and bigger vesicle distribution and the more obvious deformation.
在有人类记载的历史中，纳布诺火山并未喷发，但火山附近的熔岩流是相对较新的地质。
The Nabro volcano has not erupted in recorded human history, but lava flows near the volcano are relatively recent geologically.
除了熔岩流，埃特纳也几乎稳定、有节奏地喷发蒸汽、火山灰和熔融的岩石。
Besides lava flows, etna produces an almost constant, rhythmic discharge of steam, ash and molten rock.
火山猛烈的喷发不断地改变周围的景观，熔岩流揭示了奇妙的地质构造过程。
Volcanic eruptions constantly change landscape around and the lava flows reveal the surprising geological formations.
基拉韦厄是一个盾状火山，或低，轻轻地倾斜的建造火山几乎完全由玄武岩熔岩流。
Kilauea is a shield volcano, or a low, gently sloping volcano built almost entirely from basaltic lava flows.
熔岩流的边界比中心冷却得更快，形成了被称为流堤(图片中心位置)的似墙的结构。
The sides of the flow can also cool faster than the center, leading to the formation of wall-like structures known as flow levees (image center).
杂志内的照片展示了夏威夷大岛互为参照的自然景观。岛屿建于海洋底部万古流淌的熔岩流之上。
Photos within the magazine reveal the natural contrasts of Hawaii's Big Island, built over eons by lava flows welling up from the ocean floor.
他们发现沙莰基隆起是由很多层硬化的熔岩所组成，其中个别熔岩流的厚度竟达75英尺(23米)。
They found Shatsky Rise is made up of layers of hardened lava, with individual lava flows up to 75 feet thick (23 meters).
熔岩地层是黄石公园的大峡谷中最容易看到的岩石。黄石河继续雕刻着这些古老的熔岩流。
Lava strata are most easily seen at the Grand Canyon of the Yellowstone, where the Yellowstone River continues to carve into the ancient lava flows.
宇航员所拍摄的尤耶亚科火山的精细图像展示了名为熔岩流的有趣的火山地貌(图中右上方)。
This detailed astronaut photograph of Llullaillaco illustrates an interesting volcanic feature known as a coulee (image top right).
宇航员所拍摄的尤耶亚科火山的精细图像展示了名为熔岩流的有趣的火山地貌(图中右上方)。
This detailed astronaut photograph of Llullaillaco illustrates an interesting volcanic feature known as a coulee (image top right).
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