ISBN: | 978-5-5125-3356-7 |
High Quality Content by WIKIPEDIA articles! The Victoria Island structure is a 5.5 km 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.