High resolution 14C AMS ages (∼50 ka) of organic matter associated with the loess-palaeosol Holocene-Late Pleistocene (8–130 ka) sediments of Dilpur Formation, Karewa Group, Kashmir, India

Meenakshi, Meenakshi; Kumar, Pankaj; Shrivastava, J. P.; Chandra, Rakesh; Chopra, Sundeep; Roonwal, G. S.; Sharma, Rajveer

doi:10.1016/j.quageo.2018.06.004

Cited by 26 publications

(5 citation statements)

References 24 publications

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“…These are archived in loess/paleosol sediments, freshwater lake and paleolake sediments, cave deposits, and tree ring cores (for last few hundred years) among others. For example, investigations on the late Quaternary and Holocene paleoclimate shifts from NW Himalaya and Kashmir basin are commonly based on a number of multiproxy parameters including palynology (Kar and Quamar, 2018;Srivastava et al, 2017), environmental mineral magnetic studies (Basavaiah et al, 2010), dendrochronology (Borgaonkar et al, 1996;Ram and Borgaonkar, 2014), stable isotope analyses (Krishnamurthy et al, 1982(Krishnamurthy et al, , 1986Kusumgar, 1992;Kusumgar et al, 1980Kusumgar et al, , 1986, and geochemistry of sediments (Ahmad and Chandra, 2013;Babeesh et al, 2017;Chandra et al, 2016;Mishra et al, 2015), geomorphic surface processes (Babeesh et al, 2017b;Lone et al, 2017Lone et al, , 2018aLone et al, , 2018bLone et al, , 2018cShah et al, 2017), and geochronology (Meenakshi et al, 2018). As such, investigation of pedogenic paleosols and pollen profiles from Kashmir Valley have reflected warmer humid conditions and alternations of cool temperatewarm temperate-cool temperate cycles, respectively, during the past 17,000 yr BP (Agrawal et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Paleoenvironmental shifts spanning the last ~6000 years and recent anthropogenic controls inferred from a high-altitude temperate lake: Anchar Lake, NW Himalaya

et al. 2019

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Integrating multiproxy results (geochemistry, mineral magnetism, grain size, and C/N ratio variability supported by 14C AMS dating), obtained from a 1.4-m sediment core retrieved from high-altitude Anchar Lake, Kashmir Valley, NW Himalaya, we present a 6000-years record of paleoenvironmental and paleolimnological shifts. Phase 1 (6000–4700 cal. yr BP) revealed a wetter climate with a significant terrestrial input corresponding to the gradual strengthening of the westerlies. Phase 2 (4700–3900 cal. yr BP) reflects an overall improved westerly precipitation and autochthonous sources of organic matter (OM). Magnetic parameters also indicate higher lake levels and reducing conditions during this phase. Phase 2 was followed by a gradual diminishing pattern of the westerlies as also represented by phase 3 (3900–2500 cal. yr BP) and phase 4 (2500–1600 cal. yr BP) indicating moderate precipitation conditions, catchment stability, and temperate and/or cold-dry climatic conditions. Phase 5 (1600–500 cal. yr BP) revealed the prevalence of moderately cold/dry and further subdued westerly precipitation. Phase 6 (500 cal. yr BP to present) is represented by reduced westerly precipitation, shrinking lake margins, and significant terrestrial/anthropogenic controls over the lake basin. Mineral magnetic parameters indicate reducing lake bottom water conditions and eutrophication during this phase due to anthropogenic activities. These paleoenvironmental shifts reveal near synchronous changes (within dating uncertainties) with other regional paleoclimate records close to the present Anchar Lake location and reflect the gradual late-Holocene diminishment of the amount of winter/early summer moisture provided by the mid-latitude westerlies.

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Section: Introductionmentioning

confidence: 99%

Paleoenvironmental shifts spanning the last ~6000 years and recent anthropogenic controls inferred from a high-altitude temperate lake: Anchar Lake, NW Himalaya

et al. 2019

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“…14 C dates are in contrast to this suggestion and imply much younger ages for the K-S1, and imply higher sedimentation rates of ∼26 m for the last 100 ka (Kusumgar et al, 1986). The 14 C-dating of the marker triplet (see Figure 3) of grayish soils preserved across the Kashmir Valley yielded ages of ∼9, 15, and 20 BP (Meenakshi et al, 2018) from the Shankerpora section. However, the marker triplet clearly lies below the topmost blackish palaeosol dated to ∼22,500 ka BP (Krishnamurthy et al, 1982) and 14-21 ka PB (Agrawal et al, 1989).…”

Section: Chronostratigraphic Informationmentioning

confidence: 80%

“…However, the marker triplet clearly lies below the topmost blackish palaeosol dated to ∼22,500 ka BP (Krishnamurthy et al, 1982) and 14-21 ka PB (Agrawal et al, 1989). Meenakshi et al (2018) also calibrated the age of the local LGM to 18.6-22.3 ka. This apparent inconsistency still suggests a rather high sedimentation rate, but does not give confidence in the 14 C dates.…”

Section: Chronostratigraphic Informationmentioning

confidence: 88%

“…For example, three humus rich "Aht" horizons representing three warm and humid climatic conditions (between 80 and 50 kyr) were recognized (Bronger et al, 1987a). They also suggested The asterisks " ∧ " "#," and "*" respectively indicate the source of chronological and isotopic data from Krishnamurthy et al (1982), Agrawal et al (1989), and Meenakshi et al (2018). showing micro laminated clay coating (MLC), opaque minerals (O) channel and void filled with calcium carbonate (CC) in paleosol profile Btk (KS-S4) at the Khan Sahib (Dar et al, 2015a).…”

Section: Paleopedology In the Context Of Chronologymentioning

confidence: 99%

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Loess-Palaeosol Sequences in the Kashmir Valley, NW Himalayas: A Review

Dar

Zeeden

2020

Front. Earth Sci.

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Loess deposits and intercalated palaeosols are widespread in the Quaternary record, and these have been extensively used to gain insights into continental paleoclimatic and paleo-environmental conditions and changes. Especially over Eurasia, loess geoarchives play an important role for our understanding of past changes. Loess covers almost 500 km 2 of the Kashmir Valley in northwestern India, it occurs dominantly in plateau positions, but also on terraces and sometimes forms slope deposits with thicknesses ranging from several to more than 20 m. For the time being, however, the timing of the initiation of the loess accumulation, the provenance, the grain size composition and also the paleo-environment have not been studied systematically and yet only little quantitative data is available. Yet it is clear that deposition rates are at least comparable to European loess, and that the presence of multiple palaeosols intercalated in the loess can provide valuable information on the history of the region. The limited available data hinders regional and continental correlation, and tapping its value as archive of past environmental changes in this sensitive region with influence from Westerlies and the Indian Monsoon. However, several characteristic palaeosol patterns can be traced throughout the Kashmir valley, which provide stratigraphic information. Several studies investigate physical and chemical properties of the loess-paleosol sequences and conclude to its aeolian origin and recording of past climates. The intensity of soil formation phases is traced through various proxies in low resolution and yet without conclusive age control. Here we review the exiting literature, available data, and interpretations from loess-palaeosol sequences in the Kashmir Valley. These are placed in the context of our own observations and loess from the Indian subcontinent.

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“…Radiocarbon dates ranging in age from 38 362 ± 468 14 C BP to 8018 ± 55 14 C BP show that the youngest palaeosols are late Pleistocene to Holocene in age (Meenakshi et al . 2018). A series of five volcanic ash beds can be found in the Karewas, with one of them dating to 2.4 ± 0.3 Ma and a second, lower ash dating to 2.6 ± 0.4 Ma (Burbank & Johnson 1983).…”

Section: Geological Settingmentioning

confidence: 99%

A gomphothere (Mammalia, Proboscidea) from the Quaternary of the Kashmir Valley, India

Parray¹,

Jukar

Paul

et al. 2022

Papers in Palaeontology

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The Kashmir Valley in northern India preserves a fossiliferous Plio-Pleistocene sedimentary record extending in time almost 5 myr. These fluvio-lacustrine sediments are commonly called the Karewas, and represent an ancient lake system with drainages derived from the Greater Himalayas and Pir Panjal Ranges. Although fossils have been known from this region for more than 150 years, the record is not as rich or taxonomically well resolved as the dense fossil record of the southern Siwalik Group. Here, we report the first specimen of a Quaternary gomphothere, cf. Sinomastodon sp. from the Kashmir Valley, along with new occurrences of Equus cf. sivalensis. This is the youngest gomphothere known from the Indian Subcontinent, representing a group of proboscideans hitherto thought to have gone locally extinct at the end of the Pliocene. Sinomastodon is commonly found in eastern and southeast Asia, and its presence in the Kashmir Valley suggests robust dispersal routes from southeast Asia to the high Himalayas. The presence of this browsing proboscidean in the Pleistocene suggests a unique refugial forested intermontane ecosystem, similar to those found in southern China, different from the savannah ecosystems found in the Siwalik Group south of the mountains.

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High resolution 14C AMS ages (∼50 ka) of organic matter associated with the loess-palaeosol Holocene-Late Pleistocene (8–130 ka) sediments of Dilpur Formation, Karewa Group, Kashmir, India

Cited by 26 publications

References 24 publications

Paleoenvironmental shifts spanning the last ~6000 years and recent anthropogenic controls inferred from a high-altitude temperate lake: Anchar Lake, NW Himalaya

Paleoenvironmental shifts spanning the last ~6000 years and recent anthropogenic controls inferred from a high-altitude temperate lake: Anchar Lake, NW Himalaya

Loess-Palaeosol Sequences in the Kashmir Valley, NW Himalayas: A Review

A gomphothere (Mammalia, Proboscidea) from the Quaternary of the Kashmir Valley, India

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