Description in the geological sciences and the Lithostratigraphic Descriptive System, LSDØ2

Odell, John

doi:10.1017/s0016756800044228

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Clast size is of the same order as source-bed thickness-a few centimetres for cherts and shales, and tens of centimetres to metres for cemented thick-bedded sandstones. Most clasts have very low roundness ( -2 -0 on standard charts in Odell, 1977) and show no evidence for rounding during transport.…”

Section: Clasts and Matrixmentioning

confidence: 99%

The Kathikas mélange, SW Cyprus: late Cretaceous submarine debris flows

Swarbrick

Naylor

1980

Sedimentology

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The Maastrichtian Kathikas mélange is shown to be of sedimentary origin, being a succession of undeformed, submarine, matrix‐supported debris‐flow deposits up to 270 m thick. Internal sedimentological features include beds emphasized by colour or clast size variation, pelagic chalk interbeds, planar clast fabrics and channels. A trend of upwards‐thinning beds in the mélange is interpreted as due to debris‐flow initiation on gradually increasing slopes. Debris was shed locally from the deformed and fragmented Mamonia Complex, a series of disrupted gravity‐slide sheets of Mesozoic sedimentary rocks and deformed igneous rocks. All Mamonia lithologies are represented in the mélange, and local facies variations permit identification of individual sources. The mélange probably pre‐dates emplacement of serpentinite into the Mamonia Complex. There was also local inter‐mixing of material from the adjacent and underlying Troodos sequences. The mélange rests unconformably on both Mamonia and Troodos sequences, and formed after the main deformation episode of the Mamonia Complex. The degree of resedimentation increases gradually away from the disrupted Mamonia source rocks. The thickness and volume of the Kathikas mélange are comparable with those of recent submarine debris flow deposits on unstable or seismically active continental margins.

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Section: Clasts and Matrixmentioning

confidence: 99%

The Kathikas mélange, SW Cyprus: late Cretaceous submarine debris flows

Swarbrick

Naylor

1980

Sedimentology

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Stratigraphic Analysis: Decades of Revolution (1970–1979) and Refinement (1980–1989)

Mann

1981

Computer Applications in the Earth Sciences

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Debris flow (olistostromes) and slumping on a distal passive continental margin: the Palombini limestone–shale sequence of the northern Apennines

Naylor

1981

Sedimentology

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An olistostrome accumulation up to 530 m thick occurs in the Casanova area of the northern Apennines. It lies within or above the calciturbiditic Palombini limestone‐shale sequence, and is part of the allochthonous Vara Complex—sediments originally deposited on oceanic crust. The olistostromes are poorly sorted, monomict, matrix‐supported, submarine debris flow deposits with rigid plugs. They have a compactional foliation and a compaction‐modified, planar clast fabric created during flow. Although diachronous in the main part of the area, the olistostromes have a vertical gradational contact with the overlying slumped Palombini, in which recumbent asymmetric fold hinges and trains and slump boudins are present. Many criteria indicate soft‐sediment deformation. Fold asymmetry indicates a uniformly SW‐dipping palaeoslope. The textural gradation from slumps to olistostrome beds, plus slump folds and boudins as olistostrome clasts show that the olistostromes are dismembered slumps. In vertical sections, variations in limestone petrography, volume percentage and size of clasts confirm that the olistostromes were derived from the Palombini as a series of bed‐by‐bed slumps keeping pace with sedimentation of the Palombini. From olistostrome clast sizes and bed thicknesses, a depositional slope of ∼ 4° is estimated. The olistostromes are not precursor sediments shed from advancing nappes, as in the Bracco ridge model of some authors; rather, they were formed at the foot of a distal, block‐faulted passive continental margin, long before nappe emplacement.

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Description in the geological sciences and the Lithostratigraphic Descriptive System, LSDØ2

Cited by 3 publications

References 19 publications

The Kathikas mélange, SW Cyprus: late Cretaceous submarine debris flows

The Kathikas mélange, SW Cyprus: late Cretaceous submarine debris flows

Stratigraphic Analysis: Decades of Revolution (1970–1979) and Refinement (1980–1989)

Debris flow (olistostromes) and slumping on a distal passive continental margin: the Palombini limestone–shale sequence of the northern Apennines

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