|Country:||United States of America (United States of America)|
|Continent:||North America (North America)|
|Place of discovery:||Island Alcatraz (The Rock), former military prison|
North Pacific Ocean
37.8272, -122.422 *
|Height (sea level):||0m (± 10m)|
* The exact information is the "place of discovery description". The coordinates are only for information and only show the possible place of discovery of the sand.