superglacial

[ soo-per-gley-shuh l ]
/ ˌsu pərˈgleɪ ʃəl /

adjective

on the surface of a glacier.
believed to have been formerly on the surface of a glacier: superglacial debris.

Origin of superglacial

First recorded in 1885–90; super- + glacial

British Dictionary definitions for superglacial

superglacial
/ (ˌsuːpəˈɡleɪsɪəl) /

adjective

on or originating from the surface of a glacier