在这些不同的地区，Agassiz都能发现冰川侵蚀和沉降的痕迹。
In all these diverse regions, Agassiz saw signs of glacial erosion and sedimentation.
重点：冰川侵蚀地貌。
相应的主导地貌过程分别是流水侵蚀、冻融侵蚀和冰川侵蚀。
Their correspondent principal geomorphologic processes are water erosion, thawing erosion and glacial erosion.
研究人员发现，越往北越温暖的地方，冰川侵蚀速度较快，而较冷的南方则较慢。
They found that erosion happened faster in the warmer mountains to the north, and more slowly in the colder mountains in the south. Turns out that when glaciers are cold enough they don’t move much.
研究人员发现，越往北越温暖的地方，冰川侵蚀速度较快，而较冷的南方则较慢。
They found that erosion happened faster in the warmer mountains to the north, and more slowly in the colder mountains in the south.
科考队收集了山坡上146个岩石样本，并标记了这些岩石的冷却年代，从而可以了解其由于冰川侵蚀而被暴露的年代。
The team collected 146 samples of rocks from mountainsides and then dated the rocks’ so-called cooling age, which reveals when the rock was exposed by erosion.
这张照片拍摄于2009年8月29日，展示了数个小冰川格林兰西部注入一个几乎干涸的河谷中。 各种冰川常常会直接流入到河谷中，这是早期冰川侵蚀岩床所导致的结果。
Small glaciers spill into a mostly dry valley in western Greenland in this picture from August 29, 2009.
冰川可能形成于长期寒冷的地区，而这些缓慢移动的冰块切割了山谷，带走了大量被侵蚀的岩石碎片。
Glaciers may form in permanently cold areas, and these slowly moving masses of ice cut out valleys, carrying with them huge quantities of eroded rock debris.
我们想揭示的就是，一旦山峰被抬高并越过雪线，以冰川为代表的十分明显的侵蚀作用就开始活跃起来。
"What we show is that, once the mountain is pushed up across the snow line, a very effective erosion agent comes into play and that is represented by glaciers," said Egholm.
滚烫的熔岩冲上顶端，但是冰川的侵蚀又让它们退到一边去。
Hot rocks are shoved to the top, and erosion brings them back down the sides.
等到冰川退去，河水冲走了峡谷中的沉淀物并且继续侵蚀着这些基岩。
After the glaciers retreated again, fresh rivers cleaned out the sediments and continued carving away at the bedrock.
冰川移动会侵蚀山地（冰川移动通常会导致出现角峰和冰斗谷），但是最冷的冰川被冻得固定在某个地方，就会保护山脉并且还会让它们“长高”。
Moving glaciers can cause erosion on mountains, but the coldest glaciers, frozen in place, protect mountains and allow them to grow taller. Cynthia Graber reports.
在我们今天的地球上，地下水位不断下降，土壤受到侵蚀，冰川正在融化，鱼群种类不断减少，还有近10亿人口每天都在挨饿。
'Right now on Earth, water tables are falling, soil is eroding, glaciers are melting, and fish stocks are vanishing. Close to a billion people go hungry each day.'
冰川的消融对半岛形成侵蚀，形成了一种层叠的花岗岩峭壁，岩层既带来了各种新的可能性，又让海平线的视野一览无余。
As a cascading granite cliff shaped by glaciers into a peninsula, the rock offered both new possibilities and an unobstructed view of the horizon.
大峡谷是一个典型的V形河谷。这表明了大峡谷是河道型侵蚀，而不是冰川引起的侵蚀。
The canyon is a classic V-shaped valley, indicative of river-type erosion rather than erosion caused by glaciation.
古冰川属于冰温高、活动性大和侵蚀能力强的温冰川。
The plaistocene glaciers belonged to temperate type with high ice temperature, the great activity and strong erosion.
古冰川属于冰温高、活动性大和侵蚀能力强的温冰川。
The plaistocene glaciers belonged to temperate type with high ice temperature, the great activity and strong erosion.
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