Joseph Gilbert Seamount

Joseph Gilbert Seamount is a large seamount in the Tasman Sea located 450 km (280 mi) 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 11,500 km² (4,400 sq mi) and rising to 2,400 m (7,900 ft) below sea level.^[2]

Joseph Gilbert Seamount
Topographic map of Zealandia, showing Gilbert Seamount
Summit depth	2,400 m (7,900 ft)
Location
Location	Tasman Sea
Coordinates	42°52′18.1″S 164°4′0.1″E
Country	New Zealand
Geology
Type	Seamount (continental fragment)

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 4,400 m (14,400 ft) deep saddle.^[2]

Joseph Gilbert Seamount is named after Joseph Gilbert, captain of HMS Resolution (1771) on the second voyage of James Cook,^[1] and has been known under a variety of names throughout its history, including Gilbert Ridge, Gilbert Seamount Complex and Gilbert Seamount.^[1]

References

1. "Marine Gazetteer Placedetails". Retrieved 15 March 2020.
2. Wood, R. (2002). "Finding the continental shelf – integration of geology and geophysics" (PDF). GNS Science. pp. 3, 4. Retrieved 15 March 2020.
3. Gaina, C.; Müller, R. D.; Brown, B.; Ishihara, T. (2001). "Microcontinent formation around Australia" (PDF). Geological Society of Australia. p. 399. Archived from the original (PDF) on 23 July 2008.