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Animal Farm
Name Alias(es):
18 36'S, EPR
MGDS_FeatureID lowest in hierarchy:
Activity:
Max Temperature Category:
Latitude:
-18.6080
Longitude:
-113.4000
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2675
Minimum Depth (mbsl):
2660
Tectonic setting:
Full Spreading Rate (mm/a):
147.2
Volcano Number (if applicable):
Host Rock:
MORB
Deposit Type:
NotProvided
Notes on Vent Field Description:
active in 1993 and 1999, inactive in 2004; note: "HUMP zone" in Auzende et al. (1996) extends from 18 22' to 18 37'S; hydrothermal plumes virtually continuous between 17 20' and 18 40'S
Notes Relevant to Biology:
Auzende et al. (1996) has photo of Calypotogena, "In the southern part of the Hump area, hydrothermal chimneys are occupied by a large number of animals, especially alvinellid-worms, crabs (Plate 2e) and fish"; Alvin dive 3343 log in 1999 includes "Anemones, Clams, Crabs, Other worms, Sea cucumbers, Sea stars, Tube worms, Vent fish, Mussels, barnacles"; 2004 BIOSPEEDO cruise noted dead clams, mussels
Year and How Discovered (if active, visual confirmation is listed first):
1993 submersible Nautile
Discovery References (text):
JM Auzende et al. (1996) Recent tectonic, magmatic, and hydrothermal activity on the East Pacific Rise between 17°S and 19°S: Submersible observations. J Geophys Res 101(B8): 17995-18010.
Other References (text):
(plume only) Baker, E., and T. Urabe (1996) Extensive distribution of hydrothermal plumes along the superfast spreading East Pacific Rise, 13°30′-18°40′S, J. Geophys. Res., 101(B4), 8685-8695
Jollivet, D. et al. (2004) The BIOSPEEDO cruise: a new survey of hydrothermal vents along the South East Pacific Rise from 7 24'S to 21 33'S. InterRidge News 13: 20-26.
RDF link: