Los Angeles City Oil Field, Los Angeles, California, United States

Some significant public facilities built directly on the area of former oilfield operations include Shriners Hospital for Children, St. Vincent Medical Center, Belmont High School, and the Edward R. Roybal Learning Center.
Geology
Oil in the Los Angeles City field is relatively close to the surface. Every productive deposit has been in a single geologic unit, the shallow Miocene-age Puente Formation. Covering the Puente Formation throughout most of the area is a thin layer of Pliocene- and Pleistocene-age alluvium and terrace deposits.