Some very ancient sediments were no longer recognizable, having been converted to igneous and metamorphic rocks in the course of mountain building.

在造山的过程中，一些非常古老的沉积物已被转化为火成岩和变质岩，已经无法辨认了。

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Earth's internal heat, fueled by radioactivity, provides the energy for plate tectonics and continental drift, mountain building, and earthquakes.

地球内部因放射而产生的热量为板块运动、大陆漂移、造山运动和地震提供了能量。

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People started building the tunnel on the 5,018-meter-high Mila Mountain in 2015.

2015年，人们开始在5018米高的米拉山修建隧道。

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Conservation group WWF says the extensive use of cannons drains the water and electricity supplies, and the building of the pipes disfigures the mountain landscape for many years.

BBC: Snow cannons pump out artificial snow

Such is the variety of shapes and types, present through at least four mountain building periods, that visitors and locals alike cannot but marvel at the magnificient colours and structures visible around the coast of the Global Geopark.

UNESCO: Global Geoparks

It is also expanding into the second floor of its building in Mountain View, Calif.

FORBES: After Doubling Fund Size, Google Ventures Looks For Next Google