Evidence of Late Holocene shoreline progradation in the coast of Kerala, South India obtained from OSL dating of palaeo-beach ridges

Alappat, Linto; Frechen, Manfred; Kumar, Sunil; Babu, D. S. Suresh; Ravur, Rajan; Tsukamoto, Sumiko

doi:10.1016/j.geomorph.2015.05.006

Cited by 17 publications

(5 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Holocene emergent marine terraces and raised beach deposits that were dated using 14 C and U/Th techniques are also exposed 2–3 m above sea level along the west coast. These features are typically

\sim 1

m higher than equivalent features exposed along the east coast, suggesting that long‐wavelength tilting is ongoing [ Banerjee , ; Alappat et al ., ] (Figure b). The youthfulness of these terraces and deposits, combined with the possible existence of a mid‐Holocene eustatic highstand, implies that reliable long‐term uplift rates cannot be extrapolated [ Woodroffe and Horton , ; Kench et al ., ].…”

Section: Calibration and Testingmentioning

confidence: 99%

Cenozoic epeirogeny of the Indian peninsula

Richards

Hoggard

White

2016

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Peninsular India is a cratonic region with asymmetric relief manifest by eastward tilting from the 1.5 km high Western Ghats escarpment toward the floodplains of eastward‐draining rivers. Oceanic residual depth measurements on either side of India show that this west‐east asymmetry is broader scale, occurring over distances of > 2000 km. Admittance analysis of free‐air gravity and topography shows that the elastic thickness is 10 ± 3 km, suggesting that regional uplift is not solely caused by flexural loading. To investigate how Indian physiography is generated, we have jointly inverted 530 river profiles to determine rock uplift rate as a function of space and time. Key erosional parameters are calibrated using independent geologic constraints (e.g., emergent marine deposits, elevated paleosurfaces, uplifted lignite deposits). Our results suggest that regional tilt grew at rates of up to 0.1 mm a−1 between 25 Ma and the present day. Neogene uplift initiated in the south and propagated northward along the western margin. This calculated history is corroborated by low‐temperature thermochronologic observations, by sedimentary flux of clastic deposits into the Krishna‐Godavari delta, and by sequence stratigraphic architecture along adjacent rifted margins. Onset of regional uplift predates intensification of the Indian monsoon at 8 Ma, suggesting that rock uplift rather than climatic change is responsible for modern‐day relief. A positive correlation between residual depth measurements and shear wave velocities beneath the lithosphere suggests that regional uplift is generated and maintained by temperature anomalies of ±100 °C within a 200 ± 25 km thick asthenospheric channel.

show abstract

\sim 1

Section: Calibration and Testingmentioning

confidence: 99%

Cenozoic epeirogeny of the Indian peninsula

Richards

Hoggard

White

2016

Geochem Geophys Geosyst

View full text Add to dashboard Cite

show abstract

“…A sequence of beach ridges and swales behind the ridges can provide a relative chronological geological and environmental record [2]. Sediments in beach ridges can be characterized by wave built-facies, which are usually covered by sand accretion due to wind activity [2,5]. The sediment itself can hold records of past coastal processes, environmental conditions, climate, the direction of the longshore current, as well as wind direction and speed, and even natural hazards such as storms [6] and tsunamis [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…The sediment itself can hold records of past coastal processes, environmental conditions, climate, the direction of the longshore current, as well as wind direction and speed, and even natural hazards such as storms [6] and tsunamis [7,8]. In addition to serving as an indicator of shore position and form, they can also be used to indirectly measure changes in sea level [5].…”

Section: Introductionmentioning

confidence: 99%

“…To comprehend past sea levels, identifying and quantifying sea level indicators within stratigraphic sections of beach ridge sequences is frequently necessary. These indicators, as well as markers, are observed in shore regions where land and ocean interact; mainly, the transition between shoreface (SF) and foreshore (FS), foreshore (FS) and backshore (BS) [5], or aeolian deposits, and particularly markers of storm wave swash height (SWSH) and ordinary berm (ob) [9]. Furthermore, these markers must also be considered along with other characteristics of sediment, such as grain size, sorting and colour.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coastal Evolution of Satingpra Peninsula, Songkhla Province: Implications for Understanding Songkla Lagoon Formation

Laerosa,

Pradit,

Wattanavatee

et al. 2024

Trends Sci

View full text Add to dashboard Cite

Songkhla Lagoon has been studied for decades, but there is no clear evidence of its origin. As a barrier to the lagoon, the Satingpra Peninsula plays a crucial role in understanding its formation. Eleven sediment samples from sand ridges and tidal flats on the Satingpra Peninsular were collected and analysed for granulometry and geochronology. Both coarse-grained and fine-grained quartz-rich fractions were utilised to prepare samples of aliquots. The optically stimulated luminescence (OSL) dating was performed using the single-aliquot regenerative dose method for a determined (deposited) age. In addition, previous research, geological surveys and geochronological data were combined to explain their formation in this region. The OSL ages in the present study indicated that the late Holocene regression occurred between 0.36 and 3.27 ka (ka stands for 1,000 years). Integrated with previous studies, recorded ages dating back to the mid-Holocene sea level rise (ca. 6.5 ka) and the subsequent late-Holocene decline, indicate that both the old lagoon and middle beach ridge exhibit a sand ridge formation that runs parallel to the shoreline, extending from the south to the north. The middle sand, in this study, formed from about 3.02 to 1.5 ka ago resulting in the lagoon being isolated from the sea during that time. The lagoonal tide led the deposition as the present tidal flat from 3.3 to 1.7 ka. About 2.19 ka ago, the inner and middle ridges formed due to wind-driven processes influenced by a dry climate. This was followed by a continued sea level regression, leading to the formation of the outer ridge around 1.5 ka ago when the sea level was 1.4 m below the present sea level. However, it’s essential to consider this sea level data in relation to the tectonic and human-induced land motions in the surrounding area. HIGHLIGHTS OSL ages, based on average dose model at the Northern Satingpra Peninsula were 1.04 - 3.27 ka. The old sand ridges of the Satingpra Peninsula prograde northward after mid Holocene sea level highstand. Paleo sea level based on wind-wave sediments contact was 1.4 m lower than present day at 1.46 ka. GRAPHICAL ABSTRACT

show abstract

“…Kerala coast in southern tip of India is known for its scenic and natural beauty as it is endowed with a unique association of different landform features of Late Quaternary origin and is a major depocenter of economically viable placer mineral resources. Like many of the world’s coastlines, the Indian coastline too has been modified due to coastal processes, climate changes and other geoevents including neotectonic activities in the Quaternary period [ 1 – 2 ]. The coastline has oscillated many times due to marine transgression and regression during the Late Quaternary period especially since Last Glacial Maximum [ 3 – 8 ].…”

Section: Introductionmentioning

confidence: 99%

Geomorphic response to sea level and climate changes during Late Quaternary in a humid tropical coastline: Terrain evolution model from Southwest India

et al. 2017

View full text Add to dashboard Cite

The coastal lands of southern Kerala, SW India in the vicinity of Achankovil and Thenmala Shear Zones reveal a unique set of geomorphic features like beach ridges, runnels, chain of wetlands, lakes, estuaries, etc. The chain of wetlands and water bodies that are seen in the eastern periphery of the coastal lands indicates the remnants of the upper drainage channels of the previously existed coastal plain rivers of Late Pleistocene age that are later broadened due to coastal erosion under the transgressive phase. The terrain evolutionary model developed from the results of the study shows that the Late Pleistocene transgressive events might have carved out a major portion of the land areas drained by the coastal plain rivers and as a result the coastal cliff has been retreated several kilometers landwards. The NNE—SSW trending beach ridges located close to the inland wetlands indicate the extent of shoreline shift towards eastwards during Late Pleistocene period. The present beach parallel ridges in the younger coastal plain indicate the limit of the Mid Holocene shoreline as the transgression was not so severe compared to Late Pleistocene event. The zone of convergence of the two sets of beach ridges coincides with the areas of economically viable heavy mineral placers that resulted from the size and density based sorting under the repeated transgressive events to which the coast had subjected to. The chain of wetlands in the eastern side of the study area has been evolved from a mega lagoon existed during Late Pleistocene. The Pallikkal River that links discrete eastern wetland bodies has been evolved into its present form during Early Holocene.

show abstract

Evidence of Late Holocene shoreline progradation in the coast of Kerala, South India obtained from OSL dating of palaeo-beach ridges

Cited by 17 publications

References 68 publications

Cenozoic epeirogeny of the Indian peninsula

Cenozoic epeirogeny of the Indian peninsula

Coastal Evolution of Satingpra Peninsula, Songkhla Province: Implications for Understanding Songkla Lagoon Formation

Geomorphic response to sea level and climate changes during Late Quaternary in a humid tropical coastline: Terrain evolution model from Southwest India

Contact Info

Product

Resources

About