The larger particles (boulders, etc.) not broken down during transport in the glacier because of the slow speed of glacier and abrasion.
Explanation:
When a mountain glacier start moving from mountain towards valley it creates some sorts of landforms by following some methods like abrasion, attrition etc. Moraine formed as a depositional land form in front, back, parallel and side pf a glacier. It refers to the accumulation of sediments ranging from large boulders to small particles at the front or at the end of a glacier.
The large boulders do not break down in smaller partcles as the followed the process of abrasion where friction takes place between glacier and its valley floor. Unless and untill the collision between two large boulders occur the boulders would not broke down.
<span>Movements of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains.</span>
The freshet is basically a flood that occurs because of heavy rainfall or because of the melting of a snow.
This type of flooding is most common in the valleys of the larger rivers, especially the ones that start their flow high in the mountains.
The large rivers have much more water, and they also have lot of tributaries, so when there's a heavy rainfall they receive enormous amounts of water, which easily causes a flood.
Also, when the snow melts, lot of water is released from it, and most of that water gets into the river, or first in its tributaries and that in it, so there's a high possibility of a big flood occurring suddenly.
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