The Shoreface

Niedoroda, Alan W.; Swift, Donald J. P.; Hopkins, Thomas S.

doi:10.1007/978-1-4612-5078-4_8

Cited by 30 publications

(23 citation statements)

References 88 publications

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“…The shoreface sand length is several orders of magnitudes larger than the pinch‐out depth and is clearly an important input parameter for geometrical modelling. Angles of the sediment surface obtained from Niedoroda et al (1985) and Walker & Plint (1992). (b) High curvature coastline and facies belts in the Ebro Delta, Spain.…”

Section: Modern Wave‐dominated Coastsmentioning

confidence: 99%

Genesis of an over‐thickened shoreface sandstone tongue: The Rannoch and Etive formations of the Middle Jurassic Brent delta, North Sea

Helle

Helland‐Hansen

2009

Basin Research

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Progradational, wave‐dominated shoreface sandstones are typically reported to have thicknesses of less than 30 m. The shoreface sandstones of the Rannoch and Etive formations in the North Sea Brent Group, however, comprise far greater thicknesses (in places exceeding 100 m). The genesis of these successions have not been well understood, and the purpose of this study is to investigate within the framework of facies geometries in both modern and ancient depositional systems how the Rannoch‐Etive sandstones could have been formed, on a local‐regional scale. The facies analysis concludes that the Brent delta advance represents a single progradational event, not punctuated by transgressions. In such a scenario, the vertical sandstone thickness would be determined by: 1) shoreline trajectory angle, 2) the horizontal (dip‐directed) length of shoreface sand (typically 1–2 km in modern systems), and 3) shoreface sand pinch‐out depth (typically 5–12 m in modern systems). Within a framework of modern facies geometries, a 100 m thick vertical shoreface sandstone succession could result from a regression characterised by a shoreline trajectory of 2.6–5.4° (implying 80–95 m rise in relative sea level per 1–2 km of progradation), a 5–12 m deep shoreface sand pinch‐out depth, and a 1–2 km shoreface sand length. If, however, one applies such a model for the entire Brent delta progradation in the study area (200 km) this implies a rise in relative sea level of c. 5000 m, which clearly would be associated with large amounts of deposits accumulating behind and in front of the advancing shoreline. Such deposits are not present, which implies that modern facies geometries do not apply and that rising sea level was not of major importance in defining stratigraphic architecture. It is more likely that the regional overthickening of the Rannoch‐Etive sandstones resulted from progradation with a deep shoreface sand pinch‐out depth.

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Section: Modern Wave‐dominated Coastsmentioning

confidence: 99%

Genesis of an over‐thickened shoreface sandstone tongue: The Rannoch and Etive formations of the Middle Jurassic Brent delta, North Sea

Helle

Helland‐Hansen

2009

Basin Research

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“…The shoreface is usually defined as a zone of shoaling but non-breaking waves (Komar, 1976;Niedoroda et al, 1985;Vincent, 1986;Kleinhans, 2002) and is often regarded as a dynamic equilibrium surface responding to wave energy dissipated across its profile (cf. Pilkey et al, 1993 for a critical review), especially when engineering issues are concerned (e.g., Hanson and Kraus, 1989;Kriebel et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Sediment transport under wave and current combined flows on a tide-dominated shoreface, northern coast of France

Héquette

Hemdane²,

Anthony

2008

Marine Geology

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“…Meanwhile, the eastern part of the sand spit, which may have had higher subaerial relief, is emergent but will be similarly submerged and reworked within a few centuries. This transgressive west-to-east submergence and reworking of the upper part of the CHS is needed to explain the progressive southeastward rise of both the upper and lower slope breaks of the CHS (see The Cross-Hosgri Slope section) and is consistent with simple models for shoreface retreat and vertical change in response to sea-level rise (e.g., Bruun, 1962;Swift, 1976;Niedoroda et al, 1985).…”

Section: Origin and Evolution Of The Cross-hosgri Slopementioning

confidence: 72%

Offset of Latest Pleistocene Shoreface Reveals Slip Rate on the Hosgri Strike-Slip Fault, Offshore Central California

Johnson¹,

Hartwell²,

Dartnell³

2014

Bulletin of the Seismological Society of America

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The Hosgri fault is the southern part of the regional Hosgri-San Gregorio dextral strike-slip fault system, which extends primarily in the offshore for about 400 km in central California. Between Morro Bay and San Simeon, high-resolution multibeam bathymetry reveals that the eastern strand of the Hosgri fault is crossed by an ∼265 m wide slope interpreted as the shoreface of a latest Pleistocene sand spit. This sand spit crossed an embayment and connected a western fault-bounded bedrock peninsula and an eastern bedrock highland, a paleogeography resembling modern coastal geomorphology along the San Andreas fault. Detailed analysis of the relict shoreface with slope profiles and slope maps indicates a lateral slip rate of 2:6 0:9 mm=yr, considered a minimum rate for the Hosgri given the presence of an active western strand. This slip rate indicates that the Hosgri system takes up the largest share of the strike-slip fault budget and is the most active strike-slip fault west of the San Andreas fault in central California. This result further demonstrates the value and potential of high-resolution bathymetry in characterization of active offshore faults.Online Material: (1) High-resolution bathymetric data for the cross-Hosgri slope and (2) metadata that describes data collection, processing, and formatting.

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The Shoreface

Cited by 30 publications

References 88 publications

Genesis of an over‐thickened shoreface sandstone tongue: The Rannoch and Etive formations of the Middle Jurassic Brent delta, North Sea

Genesis of an over‐thickened shoreface sandstone tongue: The Rannoch and Etive formations of the Middle Jurassic Brent delta, North Sea

Sediment transport under wave and current combined flows on a tide-dominated shoreface, northern coast of France

Offset of Latest Pleistocene Shoreface Reveals Slip Rate on the Hosgri Strike-Slip Fault, Offshore Central California

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