Sources

• http://www.nature.nps.gov/geology/parks/labe/#maps

• http://www.nps.gov/labe/naturescience/index.htm

• http://www.nps.gov/labe/forkids/index.htm

• The Geology of Lava Beds. National Park Service US Department of the Interior- link to pdf. http://www.nps.gov/labe/planyourvisit/loader.cfm?csModule=security/getfile&PageID=158325