Small Scale Sedimentary Structures Resulting from Foot Impressions in Dune Sands

Lewis, D. W.; Titheridge, David

doi:10.1306/212f7581-2b24-11d7-8648000102c1865d

Cited by 11 publications

(2 citation statements)

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“…7B). This structure is interpreted as a footprint by a larger animal on the active dune surface (Van Der Lingen & Andrews 1969;Lewis & Titheridge 1978;Lea 1996).…”

Section: Secondary Featuresmentioning

confidence: 99%

Late glacial and Holocene sand drift in northern Götaland and Värmland, Sweden: sediments and ages

Alexanderson

Bernhardson

2019

GFF

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The aeolian deposits of Sweden have received modest attention, despite their usefulness as a palaeoenvironmental archive. Here we present sedimentological information and optically stimulated luminescence (OSL) ages from inland sand dunes in the lowlands of south-central Sweden. Three main lithofacies, each with two subfacies, were identified in the deposits: massive sand, laminated sand and crossbedded sand. Massive sand was most common and present at all sites, and is largely due to secondary bioturbation when found close to the surface. Other prevalent depositional processes are wind-ripple migration and grain flow. Secondary features include animal burrows and tracks, root traces, infiltration structures and soil profiles. The luminescence ages plot in two different groups, centred in the early and late Holocene, respectively. The primary dune-forming phase occurred in the early Holocene, after local deglaciation and uplift above sea/lake level. However, at some sites, OSL ages suggest a prolonged phase of sand drift, or repeated reworking, long after deglaciation due to locally beneficial conditions. The late Holocene was dominated by reactivation events and sheet sand deposition, which led to the formation of an aeolian mantle.

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“…7B). This structure is interpreted as a footprint by a larger animal on the active dune surface (Van Der Lingen & Andrews 1969;Lewis & Titheridge 1978;Lea 1996).…”

Section: Secondary Featuresmentioning

confidence: 99%

Late glacial and Holocene sand drift in northern Götaland and Värmland, Sweden: sediments and ages

Alexanderson

Bernhardson

2019

GFF

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“…Heavy-mineral concentrations, common for beach and dune horizons that experienced winnowing and deflation, work well at accentuating biogenic deformation structures [van der Lingen & Andrews 1969; Lewis & Titheridge 1978]. Furthermore, thin horizons with moderate-to-high fraction of ferri-and paramagnetic minerals would aid in accentuating sedimentary structures in GPR images due to its electromagnetic signal response [Buynevich et al 2014;Buynevich 2020].…”

Section: Discussionmentioning

confidence: 99%

Neoichnology of vertebrate traces along the western barrier coast of Ukraine: preservation potential and subsurface visualization

Buynevich

2023

GEO&BIO

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A diverse quite of vertebrate traces covers beach, aeolian, and bay-side (deflation flats) surfaces along the NW Black Sea coast of Ukraine. These include avian, ungulate, and canid footprints, as well as mammal burrows (length >5 cm; depth ~2 cm). The preservation of biogenic structures is enhanced by rapid burial (low-energy sedimentation or event deposition), algal mat formation, and salt encrustation. Continuous high-frequency (800 MHz) ground-penetrating radar (GPR) imaging aided in visualizing subsurface sections of an active burrow complex within a beach-dune ridge. Images near an active fox burrow captured distinct subsurface anomalies (point-source hyperbolic diffractions) in the upper aeolian section above the water table. Unfilled tunnel sections are easily distinguished from buried roots and other targets based on signal velocity and polarity reversals relative to air-to-sediment response at the ground surface. The diffraction geometry (angle) is related to signal velocity, providing valuable information about relative saturation of the overlying substrate. Decimeter-scale deformation of shallow reflections may be attributed to tracking surfaces, with similar examples found immediately below modern surfaces affected by anthropogenic trampling. It is likely that muddy lagoonal tracking surfaces may be preserved under layers of sand (overwash or aeolian deposition) and, following saltwater expulsion, may be recognized in geophysical images as clear deformed paleo-surfaces. Heavy-mineral concentrations (e.g. magnetite-rich sand) are common for beach and dune horizons that have undergone reworking and such anomalies often accentuate physical and biogenic deformation structures. Due to moderate-to-high fraction of ferri- and paramagnetic minerals, these anomalies are also well-expressed in GPR images due to its electromagnetic signal response. A conceptual framework of trace preservation potential (taphonomy) and geophysical recognition (GPR) suitability is proposed for this coastal region, with implications to paleo-environmental reconstruction.

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Genesis and sedimentary structures of late Holocene aeolian drift sands in northwest Europe

Koster

Castel

Nap

1993

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In northwest Europe local resedimentation of terrestrial deposits by wind from the Neolithic to the present has resulted in widespread accumulation of (aeolian) drift sands. These deposits consist mainly of fine, well-sorted and well-rounded unimodal sands; their mineralogical composition usually reflects local provenance. Palynological studies combined with radiocarbon analyses of the topmost part of buried peat sections reveal no distinct regional phases in drift sand accumulation: ages mainly vary from ad 500 to 1700. Small remnants of current actively moving drift sands provide evidence of sub-recent deflation and accumulation processes in relation to relief, topsoil and aerodynamic conditions. These are reflected in the sedimentary structures. Principal structures show dune foreset cross-bedding as well as even or wavy sub-horizontal lamination, while occasional strings of granules or small pebbles represent deflation phases. Primary structures resulting from tractional deposition (mainly sub-critical climbing ripple migration) and grainfall deposition, secondary structures (mainly slump, scour-fill and adhesion structures) and non-aeolian structures (mainly caused by rain impact, convolution structures, wetted sand crusts, and foot- or hoof-imprints) have a distinct appearance in lacquer peels and in SEM micrographs. Transport and accumulation of these temperate aeolian sands appear to have occurred under dry, moist and wet conditions.

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Small Scale Sedimentary Structures Resulting from Foot Impressions in Dune Sands

Cited by 11 publications

References 0 publications

Late glacial and Holocene sand drift in northern Götaland and Värmland, Sweden: sediments and ages

Late glacial and Holocene sand drift in northern Götaland and Värmland, Sweden: sediments and ages

Neoichnology of vertebrate traces along the western barrier coast of Ukraine: preservation potential and subsurface visualization

Genesis and sedimentary structures of late Holocene aeolian drift sands in northwest Europe

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