Milkert, Doris et al. (1996): Sedimentary facies and depositional history of the Iberia abyssal plain

ODP 149
ODP 149 897
ODP 149 898
ODP 149 899
ODP 149 900
ODP 149 901


Milkert, Doris
Universitaet Kiel, Geologisches Institut und Museum, Kiel, Federal Republic of Germany

Alonso, B.
Rice University, United States

Liu, Li
Ocean Drilling Program, United States

Zhao, Xixi
Universite Pierre et Marie Curie, France

Comas, Maria Carmen
Dalhousie University, Canada

de Kaenel, Eric
Universidad de Granada, Spain

Sedimentary facies and depositional history of the Iberia abyssal plain
In: Whitmarsh, Robert B., Sawyer, Dale S., Klaus, Adam, Beslier, Marie-Odile, Collins, Eric S., Comas, Maria Carmen, Cornen, Guy, de Kaenel, Eric, Pinheiro, Luis de Menezes, Gervais, Elisabeth, Gibson, Ian L., Harry, Dennis L., Hobart, Michael A., Kanamatsu, Toshiya, Krawcyzk, Charlotte M., Liu, Li, Lofts, Jeremy C., Marsaglia, Kathleen M., Meyers, Philip A., Milkert, Doris, Milliken, Kitty L., Morgan, Julia K., Ramirez, Pedro, Seifert, Karl E., Shaw, Timothy J., Wilson, Chris, Yin, Chuan, Zhao, Xixi, Proceedings of the Ocean Drilling Program; scientific results, Iberia abyssal plain; covering Leg 149 of the cruises of the Drilling Vessel JOIDES Resolution; Balboa Harbor, Panama, to Lisbon, Portugal; sites 897-901, 10 March-25 May 1993
Texas A&M University, Ocean Drilling Program, College Station, TX, United States
During Leg 149, a transect of five sites (Sites 897 to 901) was cored across the rifted continental margin off the west coast of Portugal. Lithologic and seismostratigraphical studies, as well as paleomagnetic, calcareous nannofossil, foraminiferal, and dinocyst stratigraphic research, were completed. The depositional history of the Iberia Abyssal Plain is generally characterized by downslope transport of terrigenous sediments, pelagic sedimentation, and contourite sediments. Sea-level changes and catastrophic events such as slope failure, triggered by earthquakes or oversteepening, are the main factors that have controlled the different sedimentary facies. We propose five stages for the evolution of the Iberia Abyssal Plain: (1) Upper Cretaceous and lower Tertiary gravitational flows, (2) Eocene pelagic sedimentation, (3) Oligocene and Miocene contourites, (4) a Miocene compressional phase, and (5) Pliocene and Pleistocene turbidite sedimentation. Major input of terrigenous turbidites on the Iberia Abyssal Plain began in the late Pliocene at 2.6 Ma.
Coverage:Geographic coordinates:
West:-11.3616East: -11.0335

Stratigraphy; Atlantic Ocean; Cenozoic; contourite; cores; Cretaceous; depositional environment; Europe; Iberian abyssal plain; Iberian Peninsula; Leg 149; lithofacies; lithostratigraphy; Mesozoic; Miocene; Neogene; North Atlantic; Northeast Atlantic; Ocean Drilling Program; ODP Site 897; ODP Site 898; ODP Site 899; ODP Site 900; ODP Site 901; paleoenvironment; pelagic environment; Pleistocene; Quaternary; rift zones; sea-level changes; seismic stratigraphy; slope stability; Southern Europe; synsedimentary processes; Tertiary;