Noun
shelfbreak (plural shelfbreaks)
An area of increasing slope that marks the edge of a continental shelf.
Mean surface circulation is cyclonic and waters around the perimeter of the Black Sea circulate in a basin-wide shelfbreak gyre known as the Rim Current. Source: Internet
This water mass flows along the shelfbreak of the western Antarctic Peninsula and thus marks the most southerly water flowing through Drake Passage and therefore circumpolar. Source: Internet