Elk Rock Island

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Elk Rock Island
Elk Rock Island (Portland, Oregon).jpg
Location Clackamas County, near Milwaukie, Oregon
Coordinates 45°26′10″N 122°38′53″W / 45.436°N 122.648°W / 45.436; -122.648Coordinates: 45°26′10″N 122°38′53″W / 45.436°N 122.648°W / 45.436; -122.648[1]
Created 1955
Operated by Portland Parks & Recreation

Elk Rock Island is an island within the Willamette River in the U.S. state of Oregon.[2] The 12- to 13-acre (4.9- to 5.3-ha) island, formed 40 million years ago by a volcano, was given to Portland by Peter Kerr in 1940.[3][4][5]

Ecology[edit]

The island contains deciduous forest, mixed evergreen-deciduous forest and perennial graminoid vegetation.[6][7]

References[edit]

  1. ^ "Elk Rock Island". Geographic Names Information System, U.S. Geological Survey. Retrieved 2010-12-14. 
  2. ^ Producer: Jim Newman (1999). "Elk Rock in Willamette River". Oregon Field Guide. Oregon Public Broadcasting. http://www.opb.org/programs/ofg/segments/view/1357. Retrieved December 14, 2010.
  3. ^ Saker, Anne (September 16, 2010). "Saving the oaks of Portland's Elk Rock Island". The Oregonian. Retrieved December 14, 2010. 
  4. ^ "Elk Rock Island". Portland Parks & Recreation. Retrieved December 14, 2010. 
  5. ^ "Friends of Elk Rock Island" (PDF). Portland Parks & Recreation. Retrieved December 14, 2010.  Note: Brochure funded by City of Portland Bureau of Environmental Services and Portland Parks & Recreation in cooperation with the Friends of Elk Rock Island and the Island Station Neighborhood in the City of Milwaukie.
  6. ^ "Site Survey: Elk Rock Island". Portland Parks & Recreation. Retrieved December 14, 2010. 
  7. ^ "Vegetation Unit Summaries for Elk Rock Island (ERI)". Portland Parks & Recreation. July 29, 2009. Retrieved December 14, 2010. 

External links[edit]