Two geologists discovered that about half of the sand from the Grand Canyon was actually once part of the Appalachian Mountains.

两位地质学家发现，约半数的来自大峡谷的沙子实际上曾经是阿巴拉契亚山脉的一部分。

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In this case, Uranium-Lead Dating was used to establish that half of the sandstone in the samples was formed at the same time the granite in the Appalachian Mountains was formed.

在这种情况下，铀铅定年法被用来确定样本中一半的砂岩是在阿巴拉契亚山脉花岗岩形成的同时形成的。

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I am now about to enter Pennsylvania; and the Appalachian mountains lie ahead.

我现在就要进入宾夕法尼亚州了，阿巴拉契亚山脉就横贯在前面。

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Small towns in the Appalachian Mountains needed nurse-midwives and I went to a town called Truitt, my father's first name.

VOA: special.2009.02.14

Huge fields of gas shale are believed to lie under the Appalachian Mountains, Michigan and the south-central states.

VOA: special.2009.10.23

The Appalachian Mountains in the eastern United States, for example, are about two hundred million years old.

VOA: special.2009.02.16

Beneath the magnificence of the Appalachian Mountains, lie deposits of a fossil fuel that keeps America running.

BBC: Climate chaos: Transcript

He probably is closer to home, near Canada or in the Appalachian Mountains.

FORBES: Feds: Gal Pal Admits Bayou Swindler On The Lam

The IAT is an attempt to connect treks in the Appalachian Mountains of the US to others in Canada, Greenland, Scotland, France, Spain and Morocco.

BBC: On the West Highland Way