The modern Monterey submarine fan, one of the largest deep-water deposits off the western US, is composed of two major turbidite systems: the Neogene Lower Turbidite System (LTS) and the late Quaternary Upper Turbidite System (UTS). The areally extensive LTS is a distal deposit with low-relief, poorly defined channels, overbank, and lower-fan elements. The younger UTS comprises almost half of the total fan volume and was initiated in the late Pleistocene from canyons in the Monterey Bay area. Rapidly prograding high-relief, channel-levee complexes dominated deposition early in the UTS with periodic avulsion events. In the last few 100 ka, much of the sediment bypassed the northern fan as a result of allocyclic controls, and deposition is simultaneously occurring on a sandy lobe with low-relief channels and on an adjacent detached muddier lobe built from reconfinement of overbank flow from the northern high-relief channels. During the relatively short-lived UTS deposition, at least seven different channel types and two lobe types were formed. This study provides a significant reinterpretation of the depositional history of Monterey Fan by incorporating all available unpublished geophysical data. ?? 2004 Elsevier B.V. All rights reserved.
Additional Publication Details
Late Quaternary evolution of channel and lobe complexes of Monterey Fan