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There is the city of Chino Hills, California and there is Chino Hills State Park, but I cannot find a citation referring to the geological formation as Chino Hills. Is it possibly part of the Santa Ana Mountains instead? I am just wondering if the actual hills are officially called something besides Chino Hills? A reference to a scientific journal would be helpful. Thanks, Alanraywiki ( talk) 18:50, 12 August 2008 (UTC) reply