@article {Valentine2010,
	title = {{Asphalt volcanoes as a potential source of methane to late Pleistocene coastal waters}},
	journal = {Nature Geoscience},
	volume = {3},
	number = {5},
	year = {2010},
	pages = {345{\textendash}348},
	abstract = {Every year, natural petroleum seepage emits 0.2{\textendash}2 Tg of oil to the ocean1. Significant oil seepage can build large underwater mounds, consisting of tar deposits with morphologies similar to volcanic lava flows, known as asphalt volcanoes2, 3. Such events are typically accompanied by large fluxes of the greenhouse gas methane4, 5. Marine sediments from the Santa Barbara basin, California, contain a record of elevated methane concentrations6, anoxia and tar deposition7 during the Pleistocene epoch that had been attributed to dissolution of methane hydrates. However, the region is known to have exhibited oil seepage in the past7. Here, we document the discovery of seven extinct asphalt volcanoes off the coast of southern California. The morphology of the deposits and geochemistry of samples taken from the two largest structures supports their classification as asphalt volcanoes, derived from a common source. We estimate that the two structures resulted from seepage of 0.07{\textendash}0.4 Tg of oil, accompanied by the emission of 0.35{\textendash}1.8 Tg of methane. Radiocarbon dating of carbonate deposits entrained with the asphalt indicates formation of the volcanoes between 44 and 31 kyr ago. The timing and volume of erupted hydrocarbons from the asphalt structures can explain some or all of the documented methane release and tar accumulation in the Santa Barbara basin during the Pleistocene.},
	keywords = {AUV Sentry (Autonomous Underwater Vehicle), HOV Alvin (Human Occupied Vehicle)},
	issn = {1752-0894},
	doi = {10.1038/ngeo848},
	url = {http://dx.doi.org/10.1038/ngeo848},
	author = {Valentine, D L and Reddy, C M and Farwell, C and Hill, T M and Pizarro, O and Yoerger, D R and Camilli, R and Nelson, R K and Peacock, E E and Bagby, S C and Clarke, B A and Roman, C N and Soloway, M}
}
@article {German2010,
	title = {{Diverse styles of submarine venting on the ultraslow spreading Mid-Cayman Rise}},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	volume = {107},
	number = {32},
	year = {2010},
	month = {aug},
	pages = {14020{\textendash}14025},
	abstract = {Thirty years after the first discovery of high-temperature submarine venting, the vast majority of the global mid-ocean ridge remains unexplored for hydrothermal activity. Of particular interest are the world{\textquoteright}s ultraslow spreading ridges that were the last to be demonstrated to host high-temperature venting but may host systems particularly relevant to prebiotic chemistry and the origins of life. Here we report evidence for previously unknown, diverse, and very deep hydrothermal vents along the similar to 110 km long, ultraslow spreading Mid-Cayman Rise (MCR). Our data indicate that the MCR hosts at least three discrete hydrothermal sites, each representing a different type of water-rock interaction, including both mafic and ultramafic systems and, at similar to 5,000 m, the deepest known hydrothermal vent. Although submarine hydrothermal circulation, in which seawater percolates through and reacts with host lithologies, occurs on all mid-ocean ridges, the diversity of vent types identified here and their relative geographic isolation make the MCR unique in the oceans. These new sites offer prospects for an expanded range of vent-fluid compositions, varieties of abiotic organic chemical synthesis and extremophile microorganisms, and unparalleled faunal biodiversity-all in close proximity.},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0027-8424},
	doi = {10.1073/pnas.1009205107},
	author = {German, C R and Bowen, A and Coleman, M L and Honig, D L and Huber, J A and Jakuba, M V and Kinsey, J C and Kurz, M D and Leroy, S and McDermott, J M and de Lepinay, B M and Nakamura, K and Seewald, J S and Smith, J L and Sylva, S P and Van Dover, C L and Whitcomb, L L and Yoerger, D R}
}
@article {Ferrini2007,
	title = {{Submeter bathymetric mapping of volcanic and hydrothermal features on the East Pacific Rise crest at 9 degrees 50 {\textquoteright} N}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {8},
	year = {2007},
	pages = {Q01006},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {1525-2027},
	doi = {10.1029/2006GC001333},
	url = {http://dx.doi.org/10.1029/2006GC001333},
	author = {Ferrini, V L and Fornari, D J and Shank, T M and Kinsey, J C and Tivey, M A and Soule, S A and Carbotte, S M and Whitcomb, L L and Yoerger, D R and Howland, J}
}
@article {Kelley2005a,
	title = {{A serpentinite-hosted ecosystem: The lost city hydrothermal field}},
	journal = {Science},
	volume = {307},
	number = {5714},
	year = {2005},
	pages = {1428{\textendash}1434},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0036-8075},
	doi = {10.1126/science.1102556},
	url = {http://dx.doi.org/10.1126/science.1102556},
	author = {Kelley, D S and Karson, J A and Fruh-Green, G L and Yoerger, D R and Shank, T M and Butterfield, D A and Hayes, J M and Schrenk, M O and Olson, E J and Proskurowski, G and Jakuba, M V and Bradley, A M and Larson, B I and Ludwig, K A and Glickson, D A and Buckman, K and Bradley, A S and Brazelton, W J and Roe, K and Elend, M J and Delacour, A and Bernasconi, S M and Lilley, M D and Baross, J A and Summons, R T and Sylva, S P}
}
@article {Shah2003,
	title = {{Episodic dike swarms inferred from near-bottom magnetic anomaly maps at the southern East Pacific Rise}},
	journal = {Journal of Geophysical Research},
	volume = {108},
	number = {B2},
	year = {2003},
	pages = {Article no. 2097},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0148-0227},
	doi = {10.1029/2001JB000564},
	url = {http://dx.doi.org/10.1029/2001JB000564},
	author = {Shah, A K and Cormier, M -H and Ryan, W B F and Jin, W and Carlut, J and Bergmanis, E C and Bradley, A M and Yoerger, D R}
}
@article {Cormier2003,
	title = {{Waxing and waning volcanism along the East Pacific Rise on the millennium time scale}},
	journal = {Geology},
	volume = {31},
	number = {7},
	year = {2003},
	pages = {633{\textendash}636},
	keywords = {AUV ABE (Autonomous Benthic Explorer), HOV Alvin (Human Occupied Vehicle)},
	issn = {0091-7613},
	doi = {10.1130/0091-7613(2003)031<0633:WAWVAT>2.0.CO;2},
	url = {http://dx.doi.org/10.1130/0091-7613(2003)031{\%}3C0633:WAWVAT{\%}3E2.0.CO 2},
	author = {Cormier, M -H and Ryan, W B F and Shah, A K and Lin, W A and Bradley, A M and Yoerger, D R}
}
@article {Kelley2001,
	title = {{Geology and venting characteristics of the Mothra hydrothermal field, Endeavour segment, Juan de Fuca Ridge}},
	journal = {Geology},
	volume = {29},
	number = {10},
	year = {2001},
	pages = {959{\textendash}962},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {0091-7613},
	doi = {10.1130/0091-7613(2001)029<0959:GAVCOT>2.0.CO;2},
	url = {http://dx.doi.org/10.1130/0091-7613(2001)029{\%}3C0959:GAVCOT{\%}3E2.0.CO 2},
	author = {Kelley, D S and Delaney, J R and Yoerger, D R}
}
