人们普遍认为，具有如此高镁含量的火山岩是不可能存在的。
It was generally accepted that volcanic rocks with such high levels of magnesium could not exist.
这一样本包括曾经柔软的的硬化沉积物的卵石、深海淤泥以及石膏颗粒和火山岩碎片。
The sample consisted of pebbles of hardened sediment that had once been soft, deep-sea mud, as well as granules of gypsum and fragments of volcanic rock.
他们建造了成千上万的圆形石质防风林并在其中种植花草，还用破碎的火山岩来保持土壤湿润。
They built thousands of circular stone windbreaks and gardened inside them, and used broken volcanic rocks to keep the soil moist.
坚硬的火山岩是一种多年来需求量很大的资源，至少从奥尔梅克人（一种生活在公元前1200年至400年之间的民族）崛起以来是这样。
The hard volcanic stone was a resource that had been in great demand for many years, at least since the rise of the Olmecs (a people who flourished between 1200 and 400 B.
大部分结晶岩石都非常坚硬，但也有例外，最常见的就是玄武岩，它是一种火山岩浆凝固后的形态，内部充满了微小的气泡，因此也具有多孔渗水的特点。
Most crystalline rocks are much more solid; a common exception is basalt, a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous.
科马提岩于1969年首次被发现，它是地球上已知的最古老的火山岩，含镁量是大多数火山岩的三倍。
First identified in 1969, komatiites are Earth's oldest known volcanic rocks and contain three times as much magnesium as do most volcanic rocks.
这是松辽北部北部深深气田火山岩的岩性和相研究。
It is the research on lithology and facies of volcanic reservoirs in Qingshen gas field of north Songliao basion.
大部分火山岩矿床为细粒灰岩。
火山岩包括黑曜岩火山玻璃。
玄武岩是最普通的火山岩。
有时，游客们可以走到这些新形成的黑色的火山岩边缘。
Sometimes visitors are able to walk out near the edge of this new black volcanic rock.
云仙山今天一直在向外喷涌火山灰、气体和火山岩。
Mount Unzen has been spewing out volcanic ash, gas, and rock today.
而熔岩沉积物又使一些地方火山岩岩层厚达20米(65英尺)。
Subsequent lava flows deposited volcanic rocks up to 20 meters (65 feet) thick in some places.
直到今天，他管理的这片城区上还是堆满了犬牙交错的火山岩石。
Today his land is a pile of jagged volcanic rocks. "We know the mountain will erupt again.
据此，辛顿和鲍尔斯认为，这处火山岩相当年轻——大概几百岁。
This observation leads Sinton and Bowles to think the lava is fairly young-maybe a few hundred years old.
存在比桑日群弧火山岩更早的新特提斯洋俯冲记录么?。
Subduction Record Earlier than arc volcanic rocks in the Sangri Group?
弗雷泽岛北岸香槟池中的这块火山岩比岛上其它岩石出现早了数百万年。
This volcanic rock, in the Champagne Pools on Fraser's northern shore, predates the rest of the island by millions of years.
岛弧和洋中脊火山岩都明显来自地幔然而他们有不懂的组成。
Both island arc and mid-ocean ridge magmas apparently come from the mantle yet they have different compositions.
二叠系储集层主要由碳酸盐岩、沉凝灰岩、碎屑岩和火山岩组成。
The reservoirs in Permian is consist of carbonate rock, tuff, clastic rock and volcanic rock.
常见有岩石碎块，包括火山岩屑，基质大部分为高龄土和伊利石。
Rock fragments including volcanics are common and the matrix consists largely of kaolin and illite.
整个岛上遍布着许多可以游泳、沙滩或火山岩的充满异国情调的地方！
There are many exotic places to go swimming, sandy or with volcanic rocks, all over the island!
火山岩透过地幔中部份熔融的软流层渗入到地壳，岩浆喷发，海山由此形成。
Seamounts form from magmatic eruptions, which occur when lava seeps up to the crust through the partially-melted sub-layer, known as the asthenosphere, in the mantle.
火山岩从山上流下，进入太平洋，它那极高的温度与冷水相遇形成了一个巨大的蒸汽雾。
The lava flows down the mountain to the Pacific Ocean. Its fierce heat produces a big cloud of steam when it hits the cold water.
变硬的火山岩一直延伸到离火山灰锥4英里（6公里）远的地方，厚达100英尺（30米）。
The hardened lava extends some 4 miles (6 kilometers) from the cinder cone, and is about 100 feet (30 meters) thick.
接踵而至的火山岩在遇到已冷却的熔岩时便被阻隔堆积起来，由此渐渐构成一个球茎状的岩石块。
The cooled lava ACTS as insulation for the lava coming behind it, and the form slowly grows into a bulbous-like chunk of rock.
火山岩将洞穴和外界隔绝开，是温度维持在一个舒适的水平，全年温度介乎华氏63至68度之间。
The volcanic rock that insulates the cave keeps the temperature at a comfortable level, between 63 and 68 degrees Fahrenheit, year round.
火山岩遭受天气的腐蚀，需要大量的保护工作才能帮助保存拉帕努伊巨石遗产现有的令人惊叹的状态。
The volcanic stone is subject to weathering, and intensive conservation efforts are needed to help preserve Rapa Nui's stone legacy in its present, awe-inspiring state.
座位于俄罗斯的堪察加半岛是真正的荒野，在半岛上，既有还冒着热气的火山岩，又有一望无边的森林。
This Russian peninsula of still-steaming volcanic rock and deep forest is one of the last true wildernesses.
座位于俄罗斯的堪察加半岛是真正的荒野，在半岛上，既有还冒着热气的火山岩，又有一望无边的森林。
This Russian peninsula of still-steaming volcanic rock and deep forest is one of the last true wildernesses.
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