Notes on Vent Field Description:
off-axis volcano, east of Cobb offset and Endeavour Segment; "Low-temperature (25 C) hydrothermal vents near the summit of Baby Bare represent the highest-temperature occurrence of off-axis hydrothermal activity found in oceanic crust older than 1 million years."; Mottl et al. (1998): "Clear, shimmering water emanates through thin sediment and exposed basalt at three or more distinct sites over an area about 6 m wide x 30 m along the fault."; Fitzgerald and Gillis (2006): "At the summit of Baby Bare seamount, Mn oxides have accumulated in the vicinity of warm venting fluids and vent fauna communities "
Notes Relevant to Biology:
Mottl et al. (1998): "infaunal clams as long as 3 cm, belonging to the genus Thysira (S.F. Lucinacea) (E. Southward, 1995, personal commun.) were found only in the vent field, where their shells are abundant both on and within the sediment."
Year and How Discovered (if active, visual confirmation is listed first):
Discovery References (text):
[Wheat et al., JGR 102: 15433-15446, 1997, Chemical plumes from low-temperature hydrothermal venting on the eastern flank of the Juan de Fuca Ridge]
Mottl, et al., (1998) Warm springs discovered on 3.5 Ma oceanic crust, eastern flank of the Juan de Fuca Ridge, Geology 26: 51–54.
Other References (text):
Davis et al. (1992) FlankFlux: an experiment to study the nature of hydrothermal circulation in young oceanic crust, Can. J. Earth Sci. 29: 925–952
Becker et al. (2000) A geological and geophysical investigation of Baby Bare, locus of a ridge flank hydrothermal system in the Cascadia Basin. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 105: 23,557–23,568
Fitzgerald and Gillis (2006) Hydrothermal manganese oxide deposits from Baby Bare seamount in the Northeast Pacific Ocean. Marine Geology 225: 145-156, doi:10.1016/j.margeo.2005.09.005.