Summary The Franciscan Complex consists, from east to west, of a belt of foliated (textural zone 2 and 3) rocks deformed beneath the Coast Range thrust (CRT), a belt of broken formation (BF) and a belt of sheared olistostromes (SO) consisting of conglomerate, greywacke, limestone, chert, greenstone, plutonic and glaucophane schist blocks in chiefly argillaceous matrix. South of the Klamath River, zone 2 and 3 rocks are of an outer fan or basin-plain facies and have overthrust midfan unfoliated (textural zone 1) BF in which suprafan lobes are preserved as megaboudins. To the north, foliated rocks are in gradational contact with similar BF and two episodes of thrusting were confined to the CRT. Blocks of chert, gabbro and metavolcanic rock were tectonically transported along thrust faults. Greywacke and conglomerate of the SO belt are inner fan deposits. The BF-SO contact is gradational, delineated by the westward appearance of greenstone, chert and plutonic blocks increasing progressively in size and/or abundance. Olistostrome units are intercalated with isoclinally folded, recycled sediments. BF and SO greywackes are commonly feldspathic litharenites with mean parameters (Dickinson 1970): Q = 54.6, C/Q = 0.28, F = 21.6, P/F = 0.97, L = 23.8 and V/L = 0.82. Sediments were deposited in a trench slope basin and intercalated with olistostromes derived from elevating portions of the accretionary basement. Progressing upwards in the local sequence north of the Klamath River, the gradational SO-BF transition, decrease in overtuned beds and a retrograding fan sequence reflect basin filling, diminished faulting and lessened relief concomitant to basin elevation.