Others pour out rivers of molten rock.

有些则熔化岩石。

The plume of molten rock and dust spreads out, and engulfs the planet.

熔岩与灰尘柱，扩散开来，吞灭地球。

No matter their shape or size, all volcanoes emit gas and molten rock.

无论它们的形状、大小如何，所有火山都会释放气体和喷发熔岩。

Officials say molten rock, gas and steam are bursting through cracks in the ground.

有关官员表示，熔岩、天然气和蒸汽正从地面裂缝中迸发出来。

But when the molten rock hits the cold sea water, it's producing another hazard, something called laze.

但当熔岩融入冰冷的海水时，它会产生另一种危险，叫做laze。

Here in mid-ocean, at the boundary between two plates, molten rock pushes up from the interior.

在海洋中部，在两个板块的交界处，熔融的岩石从内部向上涌出。

The gas is born from the pressure created by the heat of molten rock, or magma.

这些气体在高压高热的熔融岩石环境产生也就是岩浆。

Molten rock fell back into the crater, which was then filled with ocean water from tidal waves.

熔岩落回火山口，火山口中满是来自潮汐波的海水。

Several dozen people were ordered to evacuate Saturday as molten rock inched forward at 10 yards per hour.

周六，随着熔岩不断以每小时10码的速度前进，政府不得不疏散了几十人。

While the team sleep, the super-heated molten rock in the lake churns and boils, spilling over the rim.

组员们睡觉的时候，炽热的熔岩正在湖中搅动、沸腾、溢出边缘。

This molten rock or magma is lighter than the surrounding solid rock layer, so it rises through the mantle.

这些熔化的岩石或岩浆，比周围的固体岩层轻，所以它穿过地幔上升。

UNIDENTIFIED MALE: With about 1,500 volcanoes on Earth,it's no wonder we worry about these mountains of molten rock.

地球上大约有1500座火山，担心它们也是情理之中。

Sometimes, however, the top layer of magma can cool, and form ahard crust over the rest of the molten rock.

然而，有时顶层的岩浆会冷却，并在外部形成一个坚硬的壳。

A cluster of fissures spewing molten rock and devouring all that's in its path, including more than two dozen structures.

一堆裂缝喷涌着熔岩，吞噬着它的所有路径，包括二十多个建筑物。

Here's why: Quartz crystals form within a cooling blob of molten granite rock, or magma, deep under Earth's surface.

石英晶体形成于地球表面深处，一团冷却的熔融花岗岩岩石或岩浆中。

It's got big slabs of crust called tectonic plates that float on an ocean of slowly flowing rubbery molten rock.

它有巨大的地壳板块，称为构造板块，漂浮在缓慢流动的橡胶状熔融岩石的海洋上。

UNIDENTIFIED MALE: And with about 1,500 volcanoes on Earth, it's no wonder we worry about these mountains of molten rock.

地球上大约有1500座火山，所以我们担心这些内部满是熔岩的火山也是有情可原。

The heat and pressure is so great that some of this molten rock escapes upwards through cracks in the land above.

由于压力和热量太大，一部分熔化的岩石穿过大地裂缝向上逃逸。

Less dense molten rock travels from the core to the surface, where it then cools and returns — a process called convection.

密度较小的熔融岩石从核心移动到地表，然后在那里冷却并返回——这个过程被称为对流。

Like a slowly moving conveyor belt, this rising and sinking heat and molten rock pushes or pulls the plates together or apart.

就像缓慢移动的传送带一样，上升和下沉的热量和熔融岩石将板块推到一起或分开。