The Victoria Island structure is a 5.5 km (3 mi) bowl-shaped structure buried in the shale sediments of the Sacramento-San Joaquin River Delta, 12 miles (19 km) west of Stockton, California. The circular structure is part of a former sea bed, and lies 1,490–1,600 meters (4,890–4,250 ft) below sea level.[2]
Discovered during oil exploration and reported at the Lunar and Planetary Science Conference in Houston, Texas, in March 2007, it is thought to be a buried impact crater formed between 37 and 49 million years ago.[3][4]
Victoria Island, which the structure is named for, is in the San Joaquin River Delta at approximately 37°53′24″N121°32′06″W / 37.890°N 121.535°W / 37.890; -121.535.[5] The current publications do not list a more precise location for the impact structure than the island.
^Cite error: The named reference IFSG was invoked but never defined (see the help page).
^Paul Rincon (2007). 'Crater' spied under California, BBC News
^Spevack, S. C., Morrow, J. R., Spevack, B. Z. (2007). "3-D seismic and well log analyses of the Victoria Island Structure, a Potential Buried Impact Crater, San Joaquin County, California" (.PDF). Lunar and Planetary Science Conference XXXVIII. Retrieved 2009-09-17.{{cite web}}: CS1 maint: multiple names: authors list (link)
^Roach, John (2007-03-27). "Giant Meteorite Hit Ancient California, Crater Study Suggests". National Geographic News. National Geographic Society. Archived from the original on April 4, 2007. Retrieved 2009-09-01.
^"Victoria Island". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
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