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The English version of our glossary is currently under construction and will be regularly updated.

Pressure ridges

General term for any extended (when viewed from above) wall-like collection of ice blocks, produced by ice deformation.

Pressure ridges are rises in the pack ice that, due to lateral pressure and deformation between two or more ice floes, pile up at their points of contact. They can be newly formed or weathered. Pressure ridges differ from pack-ice hummocks due to their long, wall-like shape. The part of the ridge above water is the sail; the part below water is the keel.