Island in California, United States
Rhode Island is a small, partially submerged island in the San Joaquin River delta , in California .[ 2] It is part of Contra Costa County . Its coordinates are 37°59′59″N 121°34′31″W / 37.9996445°N 121.5752300°W / 37.9996445; -121.5752300 (Rhode Island ) [ 1] . It appears on a 1952 United States Geological Survey map of the area.[ 3]
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