It then meets a ridge of only about 20 meters Tom Garrison Essentials of Oceanography, Cengage Learning, 2008, p. 227 deep (40–60 m by other sources History of Flakstad & Moskenes, Lofoten Islands ) at the chain of Moskenesøya, Mosken and Værøy islands that causes an upward movement and eddies around the island edges.