Simms Island is a former marsh island in San Francisco Bay.[2] It is in Marin County, California; Its coordinates are 37°57′33″N 122°30′18″W / 37.95917°N 122.50500°W / 37.95917; -122.50500 (Simms Island)[1], and the United States Geological Survey (USGS) gave its elevation as 13 ft (4.0 m) in 1981.[1] It appears as an island on a USGS map in 1897;[3] it is labeled in a 1954 map, but fully connected to the mainland.[4]

  • USGS survey map from 1897.
    USGS survey map from 1897.
  • USGS survey map from 1954.
    USGS survey map from 1954.
  • USGS aerial imagery from 2021.
    USGS aerial imagery from 2021.

References

  1. ^ a b c d U.S. Geological Survey Geographic Names Information System: Simms Island
  2. ^ "Neighborhood News". The Petaluma Courier. Petaluma, California. 1890-12-17. p. 2.
  3. ^ Gannett, Henry; Goode, R.U.; Marshall, R.B. (1896). "California: Tamalpais Sheet". United States Geological Survey. Retrieved 18 September 2021.
  4. ^ United States Geological Survey (1954). "San Rafael Quadrangle, California" (Map). United States Department of the Interior Geological Survey. 1:24000.


Allikas: https://en.wikipedia.org/wiki/Simms_Island
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