Long-term shoreline morphodynamics: processes and preservation of environmental signals

Hein, Christopher J.; Ashton, Andrew D.

doi:10.1016/b978-0-08-102927-5.00021-7

Cited by 8 publications

(11 citation statements)

References 184 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inskip peninsula offers unique paleoenvironmental records of coastal change in the Holocene and this study further adds to recent studies of coastal paleorecords (e.g. Hein & Ashton, 2020; Oliver et al, 2017; Tamura, 2012; Tamura et al, 2019) and coastal progradation along the eastern Australian coast (e.g. Carvalho et al, 2019; Oliver et al, 2018, 2019).…”

Section: Introductionmentioning

confidence: 57%

Holocene evolution of a barrier-spit complex and the interaction of tidal and wave processes, Inskip Peninsula, SE Queensland, Australia

et al. 2021

View full text Add to dashboard Cite

This paper presents a reconstruction of the Holocene evolution of the Inskip Peninsula in SE Queensland. The peninsula links two major dune fields, the Cooloola Sand Mass to the south and K’gari (Fraser Island) to the north. Geomorphic features of this peninsula include remnant parabolic dunes, numerous beach ridges with foredunes, and a series of spits. Together these features provide insight into Holocene coastal evolution and changing marine conditions. A remnant beach ridge/foredune complex at the northern portion of Inskip may have been connected to K’gari and a river/tidal channel near Rainbow Beach township which separated it from the Cooloola Sand Mass to the south. This channel avulsed northward in the early mid-Holocene (after 8.8 ka) with spit development from the south. This was followed by a phase of beach-ridge/foredune complex development that started by ~6.7 ka. Stratigraphic evidence from the highest and best developed parabolic dunes in the northern portion of Inskip Peninsula indicates dune development from the mid-Holocene beach complex by 4.8 ka. Beach ridges with foredunes continued to prograde but notably declined in size during the late-Holocene. In the latest Holocene (<4.8 ka) many of the late-Holocene beach ridges/foredune complexes have been truncated by a re-orientation of the shoreline and longshore sediment transport has promoted the growth of the modern spit at the northern end of the peninsula. Erosive and longshore processes continue to be highly active because of tidal interactions between Great Sandy Strait and the Coral Sea. This detailed study of Inskip Peninsula’s evolution aids significantly in future coastal management decisions, and provides evidence for World Heritage Area extension for the Cooloola Sand Mass, including the incorporation of Inskip Peninsula itself. It also contributes to the global understanding to coastal evolution in an area of strong wave and tidal interaction.

show abstract

Section: Introductionmentioning

confidence: 57%

Holocene evolution of a barrier-spit complex and the interaction of tidal and wave processes, Inskip Peninsula, SE Queensland, Australia

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The aggradational architecture of the core is associated with the beach drift in the breaker zone which supplies gravels to the ridge terminus, subsequently reworked by wave refraction. This architecture, with steep landward‐dipping strata, is specific to barrier spits, where ridge development is associated with elongation through beach drift, and it does not result from storm activity or berm development as in beach ridge systems (Tamura, 2012; Bendixen et al., 2013; Hein & Ashton, 2020).…”

Section: Discussionmentioning

confidence: 99%

Morphostratigraphy of an active mixed sand–gravel barrier spit (Baie de Somme, northern France)

et al. 2022

View full text Add to dashboard Cite

This study focuses on the architectural characterization of a mixed sand‐and‐gravel spit in relation to its multi‐decadal evolution. The spit, located in the Somme estuary in northern France, is a 5 km long sedimentary body made of several amalgamated ridges with a hooked terminus. Flint pebbles originating from the erosion of Cretaceous chalk cliffs and sands reworked from the tidal flat constitute the spit. Aerial photographs demonstrate that the spit formation started in the 1940s and document its growth through time. The architecture of the spit has been characterized by ground‐penetrating radar (GPR) investigation using 400 MHz and 900 MHz antennas. The GPR data are used to distinguish progradational, aggradational and transgressive geometries that are related to cross‐shore and longshore construction, respectively. Three main morpho‐stratigraphic domains characterize the spit from the root to the terminus: (i) a beach‐ridge domain mainly made of progradational structures; (ii) an intermediate domain formed by beach‐drift structures topped by deposits with cross‐shore geometries; and (iii) a spit‐terminus domain mainly composed of beach drift structures which incorporate sand deposits. At the scale of an individual ridge, high‐frequency GPR data indicates five types of sedimentary architectures associated with the evolution from a hook stage to the subsequent elongation stage. The overall development of the barrier spit is the result of complex interactions between wave and storm dynamics, potentially modulated by the variability of submersion time related to the 18.6 year tidal cycle, and anthropogenic activities including groyne construction and gravel reloading.

show abstract

“…One of the most widely application of beach‐ridge systems is as archives of changes in climate and relative sea/lake level (Argyilan et al, 2010; Botha et al, 2018; Brooke et al, 2019; Hede et al, 2013; Hein & Ashton, 2020; Oliver et al, 2015; Otvos, 2000; Sander et al, 2015). Besides sea‐level variations and long‐term changes, the elevation of individual ridges have been explained as the result of wave height conditions, tidal and eolian processes, wind strength, sediment supply, and general local coastal dynamics (Rodríguez & Meyer, 2006; Sander et al, 2015).…”

Section: Geomorphometry Of Individual Beach Ridgesmentioning

confidence: 99%

“…The growth of beach‐ridge systems is strongly influenced by factors such as sediment supply (including supply from major rivers and from nearshore and shelf settings) accommodation (relative sea‐level changes and inherited topography), tide regime, wave transport dynamics and storm events (Hein & Ashton, 2020). As expected, larger coastal settings (strandplains) develop larger beach‐ridge systems.…”

Section: Linking Morphometric Attributes To Depositional Processes An...mentioning

confidence: 99%

Contrasting beach‐ridge systems in different types of coastal settings

Isla

Moyano‐Paz

FitzGerald

et al. 2022

Earth Surf Processes Landf

View full text Add to dashboard Cite

Beach-ridge systems are geomorphological features common in every type of coast and have been widely interpreted as geo-archives of past sea-level, climatic, or tectonic changes. These relict morphological elements are well-known by their facies, architecture, stratigraphy, and evolution. However, the coastal context where beach ridges are formed has never been evaluated. Coastal beach-ridge systems were classified into four main types corresponding to deltaic strandplains, non-deltaic strandplains, spits, and barrier islands. Our study consisted of three scales of analysis:(1) the entire beach-ridge system; (2) beach-ridge sets; and (3) individual beach ridges.Several beach-ridge systems having formed in different types of coastal settings are compared by their present characteristics. Geomorphic data generated from processing and interpreting satellite images combined with previous studies are used to quantify multi-scale attributes of beach-ridge systems. These attributes include the area, length, width, number of sets, number of ridges per set, set rotation, ridge spacing, and ridge elevation. Our findings demonstrate that significant differences define beach-ridge systems including deltaic strandplains, large non-deltaic strandplains, small non-deltaic strandplains, large spits (cuspate forelands), small spits (flying spits, bay-mouth spits and tombolos) and barrier islands. A more comprehensive characterization of the factors controlling beach-ridge variability will improve our ability to recognize the sedimentary record of ancient of these systems. The proposed basic platform can be used to isolated different beach-ridge types and systems to facilitate future process and morphodynamic studies.

show abstract

Long-term shoreline morphodynamics: processes and preservation of environmental signals

Cited by 8 publications

References 184 publications

Holocene evolution of a barrier-spit complex and the interaction of tidal and wave processes, Inskip Peninsula, SE Queensland, Australia

Holocene evolution of a barrier-spit complex and the interaction of tidal and wave processes, Inskip Peninsula, SE Queensland, Australia

Morphostratigraphy of an active mixed sand–gravel barrier spit (Baie de Somme, northern France)

Contrasting beach‐ridge systems in different types of coastal settings

Contact Info

Product

Resources

About