Victoria Island structure
|Diameter||5.5 kilometers (3.4 mi)|
|District||San Joaquin County|
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.
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.
Victoria Island, which the structure is named for, is in the San Joaquin River Delta at approximately . The current publications do not list a more precise location for the impact structure than the island.
- Rajmon, D. "Impact Database 2009.2". Impact Field Studies Group. entry for "Victoria Island". Retrieved 2010-03-16.
- 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.
- Roach, John (2007-03-27). "Giant Meteorite Hit Ancient California, Crater Study Suggests". National Geographic News (National Geographic Society). Retrieved 2009-09-01.
- "Victoria Island". Geographic Names Information System. United States Geological Survey.
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