Conglomerate of Lake Mathews area (Miocene?
TmMonterey Formation (Miocene) TvsrSanta Rosa basalt of Mann (1955) (Miocene) TvtBasalt of Temecula area (Miocene) TvhBasalt of Hogbacks (Miocene) TvepBasalt of Elsinore Peak (Miocene) TsobSan Onofre Breccia (middle Miocene) TtTopanga Formation (middle Miocene) TtpPaulerino Member: Topanga Formation (middle Miocene) TtltLos Trancos Member: Topanga Formation (middle Miocene) TtbBommer Member: Topanga Formation (middle Miocene) TvemEl Modeno Volcanics (middle Miocene) TvemaAndesitic volcanic rocks: El Modeno Volcanics (middle Miocene) TvemtTuff and tuff breccia: El Modeno Volcanics (middle Miocene) TvembBasalt: El Modeno Volcanics (middle Miocene) TaAndesitic intrusive rocks (middle Miocene): Volcanic intrusive rocks associated with El Modeno Volcanics (middle Miocene) TdDiabase intrusive rocks (middle Miocene): Volcanic intrusive rocks associated with El Modeno Volcanics (middle Miocene) TvssVaqueros, Sespe, Santiago, and Silverado Formations, undivided (early Miocene, Oligocene, and Pa