Joseph Gilbert Seamount | |
Depth: | 2400m (7,900feet) |
Map: | Zealandia, topographic map.jpg |
Coordinates: | -42.8717°N 164.0667°W |
Type: | Seamount (continental fragment) |
Joseph Gilbert Seamount is a large seamount in the Tasman Sea located 450km (280miles) west of the South Island of New Zealand at the southern edge of the Lord Howe Rise.[1] [2] It has an elongated northwest–southeast trend, covering an area of about 11500km2 and rising to 2400m (7,900feet) below sea level.[2]
The seamount is a continental fragment that rifted away from the South Tasman Rise and Challenger Plateau during the Cretaceous breakup of Gondwana.[2] [3] It is separated from the easterly Challenger Plateau by a 4400m (14,400feet) deep saddle.[2]
Joseph Gilbert Seamount is named after Joseph Gilbert, captain of on the second voyage of James Cook, and has been known under a variety of names throughout its history, including Gilbert Ridge, Gilbert Seamount Complex and Gilbert Seamount.[1]