|Repetto Formation, Los Angeles Basin
The top seal for the Repetto Formation in the Los Angeles Basin consists of inner neritic to upper bathyal shales in the Lower Pico Formation. Factors controlling the top-seal thickness of the Repetto Formation are a combination of the Repetto facies distribution and relief on the angular unconformity at the base of the overlying Pico Formation (Henry, 1987). The top-seal thickness was measured from electric logs on structural cross sections of the Repetto and younger formations in the Los Angeles Basin (Henry, 1987). These top-seal values, contoured from approximately 40 data points, display extreme variability, ranging from 0 to 800 ft (0 to 243.9 m). Locally there is no Repetto top seal where Pico sandstones are in direct contact with underlying Repetto sandstones; however, these areas of no top seal are limited in areal extent.
Henry, M. J., 1987, Los Angeles Basin—an overview, in Clarke, D., and Henderson, C., eds., Oil-producing areas in Long Beach: American Association of Petroleum Geologists Field Trip Guidebook, Pacific Section, p. 1–29.