Answer: FIRNS

AnswerCrossword Clue
FIRNSGlacial snow fields.
FIRNSFields of granular snow.
FIRNSFields of snow
firnsfield of such snow
firnsgranular snow accumulated on high mountains and subsequently compacted into glacial ice
firnsnÚvÚ
firnsFIRN, snow on high glaciers while still granular