【名师带你背单词】PTE高频考点自然类文章《火山下发现的巨大湖泊》Part3,曼拓教育微信公众号文章

Dina老师

今天我们来看看这篇在PTE听力中常考的自然类文章。

《Huge lake discovered 15 kilometres under avolcano》Part3

Dina老师

下面带着对这些单词和短语的理解，尝试读一读下面的原文，看看是不是容易理解多了呢？

We can forget about extracting the newly found water. “It’s dissolved in partially melted rock at 950 to 1000 °C, so it’s not accessible,” says Blundy.But increased water content in magma may help to explain the composition of continental crust rocks. When magma in the mantle – mainly composed of basalt – rises up into the crust, the water helps to enrich the basalt with silica and deplete it of magnesium, eventually forming rocks like the andesite found beneath the Andes.“The process in Uturuncu is a microcosm of continental crust formation, and involves much more water than we thought, probably twice as much,” says Blundy.

Water is also one of the volatile components dissolved in magma that drive volcanic eruptions, he says. “Dissolved at shallower depths where the pressure is lower, it comes out as bubbles, which end up as an explosive eruption.”

In the future, understanding more about how water can trigger eruptions could help volcanologists better interpret seismic activity, perhaps improving predictions. “Our results will hopefully improve our ability to interpret these signals of unrest,” says Blundy.

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