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。
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.
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.
火山岩中白榴石的晶体结构，来自德国波恩大学施泰因曼学院的迈克尔·m·雷斯教授用偏振光照射白榴石并拍摄到了该照片。
Crystal twinning patterns in a leucite crystal from volcanic rock, observed in polarized light by Dr. Michael M. Raith of the Steinmann Institut, University of Bonn, Bonn, Germany. Dr.
内华达山脉和喀斯喀特山脉相连接于普卢默斯县，秋季的色彩反衬着覆盖该地区火山岩的灰色背景。 造成了引人注目的景致。
The Sierra Nevada and the Cascade Mountains meet in Plumas County, and fall color against the grey backdrop of the volcanic rock that covers the region makes for dramatic views.
我租了一辆摩托车，骑遍了那个地区，发现一个牧马人穿行在雾里，走在火山岩的荒地上——完美的景象。
I rode around the area on a rented motorcycle and noticed the spectacular scene of these horsemen walking in the fog through the surrounding volcanic desert.
该地区不可预知的地质环境和火山岩结构迫使工程师放弃使用钻孔机，而是通过爆破在津轻海峡挖掘出一条通道。
Theregion's unpredictable geology and its volcanic rock prevented engineers from using boring machines, forcing them to blast and dig their way under the Tsugaru Strait.
这条被俗称为“浴缸圈”的条纹形成于沉积在科罗拉多河旁火山岩中的矿物质，随着水位不断的下降如今显现了出来。
Nicknamed "the bathtub ring", this discolouration comes from minerals that were once deposited on the volcanic rock by the Colorado River and have become visible as its level has dropped.
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.
又如，加拉帕哥斯群岛是非法打猎的一个主要目标，这个岛屿上很少有船只的着陆点与穿越火山岩地带的通道。
The Galapagos Islands, a prime target for unlicensed hunting, has few practicable landing spots for boats and passages through the volcanic-rock landscape.
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.
陆地地壳主要由花岗岩和其它轻质硅酸盐矿物构成，而海底则主要由黑色的高密度火山岩——玄武岩构成。
The dry land of the continents consists mostly of granite and other light silicate minerals, while the ocean floors are made up mostly of a dark, dense volcanic rock called basalt.
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.
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.
在这张图像中，春天的亚伊马火山顶峰的雪冠依旧明显，不过无雪的山坡开始被紫褐色和绿色覆盖，那里似乎交错分布着火山岩与植被。
In this springtime image, snow caps Llaima's summit, but the snow-free slopes appear in shades of purple-brown and green, likely a combination of volcanic rock and vegetation.
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.
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.
天很冷，火山岩并不让人舒服。
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.
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.
就在我们远眺处的下方，黝黑的沟状脊代表了另外一种50万年的沉积层，更远处铺满了玄武岩，520万年前，这块巨大的平原被淹没在火山岩浆之中。
Below us dark, gullied ridges held another half million years of sediments. Beyond them was the basalt, laid down when this vast plain was swamped in lava, 5.2 million years ago.
就在我们远眺处的下方，黝黑的沟状脊代表了另外一种50万年的沉积层，更远处铺满了玄武岩，520万年前，这块巨大的平原被淹没在火山岩浆之中。
Below us dark, gullied ridges held another half million years of sediments. Beyond them was the basalt, laid down when this vast plain was swamped in lava, 5.2 million years ago.
应用推荐