Editing Snow (section)

===Firn===
{{Main|Firn}}
[[File:Firn field on the top of Säuleck.jpg|thumb|right|[[Firn]]—metamorphosed multi-year snow]]
Firn is snow that has persisted for multiple years and has been [[Recrystallization (chemistry)|recrystallized]] into a substance denser than [[névé]], yet less dense and hard than glacial [[ice]]. Firn resembles caked sugar and is very resistant to shovelling. Its density generally ranges from {{convert|550|to|830|kg/m3|lb/ft3}}, and it can often be found underneath the snow that accumulates at the head of a [[glacier]]. The minimum altitude that firn accumulates on a glacier is called the ''firn limit'', ''firn line'' or ''snowline''.<ref name = Snowenclyclopedia/><ref name="Glacialprocess">
{{cite web|url=http://www.physicalgeography.net/fundamentals/10ae.html|title=CHAPTER 10: Introduction to the Lithosphere—Glacial Processes|last1=Pidwirny|first1=Michael|last2=Jones|first2=Scott|date=2014|website=PhysicalGeography.net|publisher=University of British Columbia, Okanagan|access-date=2018-12-20}}</ref>