An ice cliff forming the seaward margin of an inland ice sheet, ice piedmont or ice rise; the rock basement may be at or below sea level
https://nsidc.org/cryosphere/glossary-terms/icebergs-and-ice-shelves
The Perito Moreno glacier forms a 60-metre (200 ft) high ice wall before falling into Lago Argentino
By Martin St-Amant (S23678) - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=11898104