Answer :
The sedimentary layers were worn away by stream erosion happened to the sedimentary layers to the left of the axis marked by the red bracket.
Sediment is transported and eroded by streams. Small bedforms, or sedimentary structures on the bottom of a stream bed, such ripples and sand dunes, can occur when the loose sediments are carried along the bottom of the river channel.
The movement of soil, silt, and rock fragments caused by the weathering of geological structures is known as erosion. This movement occurs via wind, streams, and ice. When degraded material that is being carried by water settles out of the water column and onto the surface when the water flow slows, sedimentation takes place. The sediments that make up the banks, the floodplain, and the bed of a canal were carried there by the flow of water from higher in the catchment.
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