"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.
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。
2
With the snow-draped Sierra Nevada as a backdrop, unique erosion formations called sand tufa stand like giant cauliflower stalks in a dry Arizona lake bed.