The name "Sycamore Canyon formation" is suggested for a 3,800-foot interval of alternating conglomerates, sands, silts, and shales in the Whittier Hills. This interval has previously been described with the Fernando (Pliocene); its micro-fauna insures an Upper Miocene age for this interval. It is overlain by the Repetto formation (Lower Pliocene) and it is unconformably superjacent to the upper Puente member of the Puente formation, also of Upper Miocene age.

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