Richardson Island facts for kids
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USGS aerial imagery of the former location of Richardson Island
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| Geography | |
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| Location | Northern California |
| Adjacent bodies of water | San Francisco Bay |
| Highest elevation | 16 ft (4.9 m) |
| Administration | |
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United States
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| State |  California |
| County | Marin |
Richardson Island is a former marsh island in the Sacramento–San Joaquin River Delta, now completely surrounded by land. It is located in Marin County, California. Its coordinates are 37°56′12″N 122°31′04″W / 37.93667°N 122.51778°W, and the United States Geological Survey gave its elevation as 16 ft (4.9 m) in 1981.
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Richardson Island Facts for Kids. Kiddle Encyclopedia.