Basaltic, andesitic, and rhyolitic all refer to what?

玄、安山和流纹都什么？

Just offshore rise the basalt sea stacks of Reynisdrangar.

近海处有玄风琴 (Reynisdrangar) 玄海蚀柱。

The lava on Hawaii is made of basalt, which once cooled, is highly fertile.

夏威夷浆由玄组成， 该一旦冷却，会非常肥沃。

For this reason, we recommend only top quality Keweenawan basalt obtained from the upper midwest.

因此，我们只推荐从上中西部获得高质量基韦诺玄。

There's also sand on Mars, made of eroded basaltic rock, so it's grey.

火星上也有沙子，由被侵蚀玄组成，所以灰色。

These are giant basalt columns behind me.

我身后巨大玄石柱。

They're formed from eroding lava and basalt rocks that come from volcanic eruptions.

们由火山喷发侵蚀熔和玄形成。

Today the Giant's Causeway contains about 40, 000 basalt columns.

如今巨人之路约竖着4根玄石柱。

It took us two hours to reach the summit of this half-crystal, half-basalt peak.

我们费了两个钟头，才到达这座云斑、玄掺杂尖峰上面。

The proportion of empty space in a rock is known as its porosity.

因此，不管沉积物疏松还坚固，们中一定有空间。大部分结晶体石都非常坚硬，但也有例外，最常见就玄，一种固化火山熔，经常充满了微小气泡，从而变得十分多孔。

The skipper's definitely worth his " basalt" .

这位打漂者绝对配得上他“玄”。

That's why Mercury, Venus, Mars, and even Jupiter's volcanic moon have plenty of basalt but little granite.

这就为什么水星、金星、火星，甚至木星火山卫星都有大量玄，却很少有花岗。

Basalt is the most common type of lava rock found on Venus and throughout the inner Solar System.

玄在金星上普遍存在以及所有其他近日行星上。

He and his colleagues modeled what might happen if you smashed up a 15-mile-wide asteroid, made of basalt.

他和同事模拟了撞毁一颗15英里宽玄小行星情况。

When we're putting the basalt down on agricultural land, we typically apply it at about 20 tons per hectare.

当我们把玄粉末用在农业用地上时，我们通常每公顷会施用20吨左右。

And we realized right away that we had basaltic rocks like one might see in Hawaii.

我们立即意识到这块玄就像夏威夷可能会看到。

The NASA geologist were intrigued to find not only basalts but rocks of another sort.

美国航天局地质学家私下希望看到不仅仅玄，而另外一种石头。

Molten basalt is runnier than recycled magma and spreads out into broad " shield" volcanoes like Mars's Olympus Mons.

熔融玄比再循环浆更流动，并向广阔“盾状”火山扩散，就像火星奥林匹斯山一样。

The maria are made of darker, basaltic material, which means they probably formed from lava flooding older areas.

月海由更暗玄物质构成，这意味着们可能由淹没在更古老地区之上熔形成。

Typically, basaltic lava flows are glassy enough that in fact you would cut your hand. They can be extremely sharp.

特别，这些玄浆流玻璃状可以锋利到切掉你手。