Geochemists at Columbia University found a lode of quartzite, a metamorphic rock formed from sandstone, on the Indian Ocean island of Anjouan.

哥伦比亚大学地球化学家在印度洋昂儒昂岛上发现了一个石英岩矿脉，石英岩由砂岩形成变质岩。

Ultimately, if we could drill deep enough, we'd actually find metamorphic rocks on every planet, says McSween.

最终，如果我们能钻得足够深，我们就能在每个星球上找到变质岩，麦克斯温说。

But on other worlds, it's more typical to find metamorphic rocks forged in the split-second shock of a meteoroid impact.

但在其他星球上，更常见在流星体撞击瞬间震荡中形成变质岩石。

Ehlmann and her team previously identified metamorphic rocks on Mars that she thinks could have formed when hot groundwater circulated through rocks buried underground, a relatively low-temperature, low-pressure process.

埃尔曼和她团队之前在火星上发现了变质岩，她认为些变质岩可能热地下水在埋藏于地下岩石中循环时形成，一个相对低温、低压过程。

It's a metamorphic rock, which means it becomes something new under extreme heat and pressure without melting.

一种变质岩，意味着它在极端高温和高压下会变成新东西而不会融化。

Named for the beautifully striped metamorphic rock that Mike's holding.

因其丽条纹变质岩而得名，正迈克手中所持之石。

Actual rock, which I don't have to tell you, is a metamorphic rock of the monoclinic crystal system, if you're doing it right.

真正岩石， 不用我说，一种单斜晶系变质岩，如果你做得没错话。

Lapis lazuli is not a mineral, but rather a deep blue metamorphic rock that's been prized since early antiquity for its intense color.

青金石并非矿物，而一种深蓝色变质岩，自远古时代起便因其浓烈色彩备受珍视。

The new metamorphic rocks are typically harder, more compact, and are more resistant to weathering.

新变质岩通常更硬、 更致密，并且更耐风化。

The lowest layers of metamorphic and volcanic rocks, he called the Primary layer.

变质岩和火山岩最低层 ，他称之为初级层。

Like igneous rocks could skip being sedimentary rocks and go directly to being a metamorphic rock.

就像火成岩可以跳过 沉积岩，直接变成变质岩。