Heterogeneous Vulnerability to Hurricane Joaquin’s Influence Along the Perimeter of San Salvador Island, Bahamas

Savarese, Michael; Buynevich, Ilya V.; Caris, Jon; Curran, H. Allen; Glumac, Bosiljka; Boush, Lisa E. Park; Kopcznski, Karen A.

doi:10.1130/abs/2016am-282743

Cited by 2 publications

(4 citation statements)

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“…The Bahamian study sites are microtidal (mean tidal range ~0.3-0.5 m) and are impacted by Atlantic hurricanes of variable strength [9,10,16,17,24]. Intense storms that extend to the foredune result in a prominent dune scarp, whereas moderate storm conditions or beach segments with wide berms typically exhibit berm scarping.Well-developed berm scarps are formed by high-energy waves and are exposed to subaerial conditions during intervening fairweather periods or low-tide phases [8,9,19,20].…”

Section: Physical Settingmentioning

confidence: 99%

“…As vertical or sub-vertical features (i.e., cross-shore sediment transport barriers), berm scarps induce deposition by fairweather wave swash and onshore wind, thereby serving as nucleation sites for incipient foredunes [8,20]. This may explain alongshore continuity of some beach/dune ridges on coastal strandplains in many parts of the world [23].…”

Section: Fig 4 Georadar Images Of Paleo-berm Scarps (Frequerncy: 800 ...mentioning

confidence: 99%

“…Although they represent the minimum number of events due to the potential for episodes of net erosion [3,23], paleo-scarps act as mappable anomalies in prograded depositional systems. In addition to serving as storm indicators, the relatively limited vertical range of berm scarps can be utilized to constrain past sealevel positions [19,20,23].…”

Section: Fig 4 Georadar Images Of Paleo-berm Scarps (Frequerncy: 800 ...mentioning

confidence: 99%

“…This steep erosional feature may have variable longshore extent and is typically generated by wave erosion during storms, with subordinate mechanisms that include increased wave activity during spring high tides and seiches, ice scour, and tsunamis [12,15,22,23,27]. In contrast to dune scarps, these morphological elements receive less attention in the literature largely due to their ephemeral nature as surface features [3,8,20,23]. However, unless they are eroded by subsequent storms, berm scarps may be responsible for nucleation of foredune ridges and have the potential to be preserved within coastal lithosomes.…”

Section: Introductionmentioning

confidence: 99%

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Morphodynamics and Geological Legacy of Berm Scarps Along Non-Tidal (Ukraine) and Microtidal (The Bahamas) Coasts

Buynevich¹,

Savarese²,

Kadurin³

et al. 2015

Вісник ОНУ

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Berm scarps are erosional features characteristic of all coastal accumulation forms. Their profiles range from steep to overhanging (ψ>90) and evolve through slope adjustment and burial by swash and aeolian accretion. Examples from the mixed siliciclastic-bioclastic beaches of the non-tidal Black Sea coast of Ukraine and the microtidal oolitic-bioclastic carbonate islands of the Bahama Archipelago demonstrate a wide range of scarp morphologies. Truncations of berm strata and density lag at the scarp base accentuate their recognition in the field and in geophysical (georadar) records. Although ephemeral as surface features, berm scarps may act as nucleation sites for aeolian aggradation, thereby generating continuous coast-parallel dune ridges. Accumulation of organic debris promotes colonization of incipient foredunes by plants and provides chronological control of erosional events. Therefore, paleo-berm scarps serve as important geological indicators of past storm activity and aid in constraining sea-level position.

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Section: Physical Settingmentioning

confidence: 99%

Section: Fig 4 Georadar Images Of Paleo-berm Scarps (Frequerncy: 800 ...mentioning

confidence: 99%

Section: Fig 4 Georadar Images Of Paleo-berm Scarps (Frequerncy: 800 ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Morphodynamics and Geological Legacy of Berm Scarps Along Non-Tidal (Ukraine) and Microtidal (The Bahamas) Coasts

Buynevich¹,

Savarese²,

Kadurin³

et al. 2015

Вісник ОНУ

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Distribution of Encrusting Foraminifera At San Salvador, Bahamas: a Comparison By Reef Types and Onshore−offshore Zonation

Tichenor

Lewis

2018

Journal of Foraminiferal Research

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Foraminifera attached permanently to hard substrates have received relatively little research attention in distributional studies compared to free-living specimens. Because attached (encrusting) species are commonly found on hard substrata, such as coral rubble, and they are sensitive to environmental variables controlled by water depth and distance from shore, these species can be useful in paleoecologic research. This study examined the distribution of encrusting foraminifera found at the outer Bahamian island of San Salvador to describe onshore-to-offshore zonation and to characterize foraminiferal assemblages found in different reef types. Cobbles were collected along two transects on the leeward side of the island and at numerous locations on the windward side, including a bank barrier reef and the eastern platform edge. Encrusting foraminifera found on the undersides of cobbles were quantified and identified by taxa, morphotype, and taphonomic grade. Significant differences were found in the distribution of encrusting foraminiferal species across the carbonate platform, based on both counts of individuals and area of substrate covered. The zonation was particularly evident between platform-top and platform-margin assemblages. Nearshore assemblages were dominated by well-preserved Homotrema rubrum. Patch reefs, especially those found further from shore, were characterized by a relatively diverse assemblage with prominent Planorbulina spp. whereas bank barrier reefs were dominated by H. rubrum, often with Gypsina plana. Platform-margin assemblages were the most distinct because they were dominated by large, sheet-like G. plana, with other taxa being small, sparse, and poorly preserved.

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Heterogeneous Vulnerability to Hurricane Joaquin’s Influence Along the Perimeter of San Salvador Island, Bahamas

Cited by 2 publications

References 0 publications

Morphodynamics and Geological Legacy of Berm Scarps Along Non-Tidal (Ukraine) and Microtidal (The Bahamas) Coasts

Morphodynamics and Geological Legacy of Berm Scarps Along Non-Tidal (Ukraine) and Microtidal (The Bahamas) Coasts

Distribution of Encrusting Foraminifera At San Salvador, Bahamas: a Comparison By Reef Types and Onshore−offshore Zonation

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