Answer:
It seems like limestone which is a sedimentary rock.
<span>an idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion.</span>
The velocity of the river increased.
There was more erosion in the stream.
The type of sediment that moved changed