With additional time, pressure, and refrozen meltwater from above, the small firn granules become larger, interlocked crystals of blue glacial ice.

随着时间的推移，压力的增加，再加上从上方重新冻结的融水，小冰原颗粒成为相互锁结的大晶体蓝色冰川冰。

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As geologists mapped glacial deposits in the late nineteenth century, they became aware that there were several layers of drift, the lower ones corresponding to earlier ice ages.

19世纪晚期，在地质学家对这些冰川沉积进行定位的时候，他们意识到有好几个漂流层，位置较低的对应的是更早的冰川期。

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Interglacial periods are, typically periods of time between Ice Ages, when the climate warms, and the glacial ice retreats for a time, before things cool off again and another Ice Age begins.

间冰期通常是在冰期之间的一段时间，这时气候变暖，冰川的冰会暂时消退，直到气候再次变冷，下一个冰期开始。

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The train stops twice en route, at Eigerwand and Eismeer stations, both with phenomenal views across wild mountains and crevassed glacial ice, before cresting Jungfraujoch.

BBC: To the top of Europe by Swiss rail

Its characteristic features are the landforms shaped by the Ice Age: glacial ridges, pine and lichen-clad heaths, kettle holes and small ponds filled with crystal clear water.

UNESCO: NATURAL SCIENCES

The Icefields Parkway that stretches from Lake Louise to the south and Jasper at the northern end has towering peaks, tumbling unspoiled rivers, massive sheets of glacial ice flowing down the valley to meet the road, and hanging above in the rafters of the peaks.

BBC: The natural wonders of Banff and Jasper National Parks