The water was always laden with pebbles, gravel, and sand, known as glacial outwash, that was deposited as the flow slowed down.
水里总是遍布鹅卵石、砾石和沙子——它们被称为冰水沉积，是在水流减缓时沉积下来的。
2
Sediment as you know, is material like sand, gravel, fossil fragments that is transported by natural processes like wind, water flow or the movement of glaciers.
如你所知，沉积物是通过风、水流或冰川运动等自然过程输送的物质，如沙子、砾石、化石碎片等。
3
To a certain extent, the water began to penetrate the pyramids area around the gravel and continue eastward flow.