Basin wastes are those that have been produced by the erosion and deposition of sediment in a basin. Basins can be found on all continents, and are often the result of the convergence of two or more rivers.
As rivers flow into and out of a basin, they pick up sediment along their way. Over time, this sediment accumulates, forming a basin waste.
Basin wastes often have slots, or crevices, in them. These slots form as a result of the different ways that the sediment is deposited. Some sediments fall as nearly flat sheets, while other sediments fall in clumps or layers.
The slots in basin wastes are caused by the layers of sediment that fall differently. When the layers fall through the water, they create waves that travel down the slots.