Wave-Formed Sedimentary Structures—a Conceptual Model

Clifton, H. Edward

doi:10.2110/pec.76.24.0126

Cited by 184 publications

(151 citation statements)

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“…The subimage in each box was highpass filtered (fifth-order Butterworth filter, 0.67 cpm cutoff frequency), and Hanning windowed in both x and y direc- Figure 1. Schematic indicating the ladder-like appearance of cross ripples described by Clifton et al [1971], Machida et al [1974], and Clifton [1976]. Arrow indicates the reported wave direction, i.e., bisecting the $90°intersection angle between long and short crests.…”

Section: Field Site and Datamentioning

confidence: 90%

“…[4] In the cross-shore bed state progression proposed by Clifton [1976], cross ripples occur at intermediate wave energies. Similarly, cross ripples occur at intermediate wave energies in the bed state storm cycle [Hay and Wilson, 1994;Smyth et al, 2002;Hay and Mudge, 2005].…”

Section: Introductionmentioning

confidence: 99%

“…The same is not the case for wave direction, however. Clifton et al [1971] and Clifton [1976] noted that although cross ripples resemble interference ripples, waves were not incident from two directions when cross ripples were observed.…”

Section: Introductionmentioning

confidence: 99%

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Cross‐ripple patterns and wave directional spectra

Cheel

Hay

2008

J. Geophys. Res.

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[1] Rotary sonar images of the seafloor during SandyDuck97 are used to investigate the geometry of the cross-rippled bed state relative to the directional properties of the incident waves. The sonar imagery indicates that the cross-ripple pattern is a quasi-regular diamond-shaped lattice constructed of variable length ladder-like tiles, each with shorter-wavelength ripples residing within the troughs of the longer-wavelength component. The longer-wavelength crests were oriented at approximately ±30°with respect to the incident wave direction. Most wave directional spectra were not bimodal in direction and, for the small number (17%) which were, the distribution of the angular separations of the two peaks was very broad and indicated no preferred value. Thus, contrary to some previous suggestions in the literature, these results indicate not only that cross ripples do not require waves propagating from two different directions for their formation but also that for most of the occurrences during this experiment, cross ripples formed when the incident wave field was unimodal in direction. Finally, the orientation angles of the long-crested ripple components exhibit no dependence on mean current velocity.

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Section: Field Site and Datamentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Cross‐ripple patterns and wave directional spectra

Cheel

Hay

2008

J. Geophys. Res.

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“…These deposits correspond to the outer planar facies of Clifton and others (1971, p. 114). A lunate megaripple facies that Clifton and others (1971) recognized at the base of the shoreface is, however, unrecognizable in facies E sandstones, suggesting that waves were small and of short period, sand grain size was too fine for development of lunate megaripples (Clifton, 1976), and (or) that bedforms have been destroyed by burrowing infauna.…”

Section: Distributary Mouth Barsmentioning

confidence: 94%

“…Modern analogues of the remainder of subenvironments in the destructional delta front facies, with the exception of the beach foreshore-shoreface, are not well known at the present time. The beach foreshore-shoreface, in contrast, has been well documented by Thompson, 1937 andClifton andothers, 1971.…”

Section: Facies Cmentioning

confidence: 99%