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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for superglacial

superglacial
/ (ˌsuːpəˈɡleɪsɪəl) /

adjective

on or originating from the surface of a glacier
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012