Abroad, ramp-like accumulation of sediment found downstream from the end moraine of a glacier is

out wash plain

Explanation:

An outwash plain is a plain developed on the gutter of a valley filled with alluvial terrain and that has meandering river meanders due to the low slope of the river course that, in times of flood, overflows the river channel and floods the region.

These plains usually occur in the lower course of the river where the relief, thinned by erosion rather than upstream, has a small topographic gradient; As a result, the river energy is diminished and cannot carry much of the sedimentary load of the river that is deposited, filling the valley with river sediments.