Where the ice passes over especially steep terrain, ripplemarks on the glacier surface indicate the icefall.
冰川所过之处，特别是那些地势陡峭的地方，会在冰川表面留下波纹痕迹，提示这些地方有冰川瀑布。
2
Many sedimentary rocks contain such features as ripplemarks, exactly like those we can see forming in sediments at the bottom of present-day lakes or shallow seas.
我们可以看到，现在的湖底或浅海底部的沉积物中形成了波痕。许多沉积岩都含有类似这种波痕的特征。
3
The group of red stone valleys in Daimeishan can be said to be the gallery of mountains and waterscape, as is also the natural museum of ripplemarks and mud cracks;