المؤلفون: Mark W. Hounslow, Samuel E. Harris, Vassil Karloukovski, Atle Mørk

المصدر: Norwegian Journal of Geology (2022)

مصطلحات موضوعية: Geology, QE1-996.5

وصف الملف: electronic resource

العلاقة: https://njg.geologi.no/component/fabrik/details/27/2339-2339Test; https://doaj.org/toc/2387-5844Test; https://doaj.org/toc/2387-5852Test

الوصول الحر: https://doaj.org/article/52a9395db5c74da796d8a0f5f03702a0Test

المؤلفون: Matija Črešnar, Branko Mušič, Barbara Horn, Manca Vinazza, Tamara Leskovar, Samuel E. Harris, Catherine M. Batt, Nejc Dolinar

المصدر: Arheološki Vestnik, Vol 71 (2020)

مصطلحات موضوعية: dolenjska, starejša železna doba, gradišče, železarsko-talilniško območje, talilne peči, interdisciplinarne raziskave, arheološka geofizika, arheomagnetno datiranje, Ancient history, D51-90

الوصف: Prazgodovinski kompleks Cvinger pri Dolenjskih Toplicah leži na strateški točki na prehodu med Dolenjsko in Belo krajino. Tukaj odkrite najdbe so imele pomembno vlogo pri opredelitvi mlajšega halštatskega obdobja v jugovzhodnih Alpah. Prav tako pomembno je odkritje železarsko-talilniškega območja. V zadnjih letih pa je bil Cvinger predmet interdisciplinarnih raziskav, ki so povezale sodobne tehnike daljinskega zaznavanja, kot so zračno lasersko skeniranje in geofizikalne meritve, s tradicionalnimi arheološkimi metodami. Rezultati so pripeljali do novih dognanj o celotnem kompleksu, vključno z natančnejšo datacijo talilniškega območja, pridobljeno z metodo arheomagnetnega datiranja.

وصف الملف: electronic resource

العلاقة: https://ojs.zrc-sazu.si/av/article/view/8803Test; https://doaj.org/toc/1581-1204Test; https://doaj.org/toc/0570-8966Test

الوصول الحر: https://doaj.org/article/08b70cdf31104dd397b2e77926aa2b1aTest

المؤلفون: Jelena Bekvalac, Catherine M. Batt, Julia Beaumont, Samuel E. Harris

المصدر: Archaeometry. 63:1024-1041

مصطلحات موضوعية: Archeology, History, law, Temporal resolution, Mineralogy, Radiocarbon dating, Biology, Isotope-ratio mass spectrometry, law.invention

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::a6b9a78424255c85e0fdb8c12f27fc1fTest
https://doi.org/10.1111/arcm.12667Test

المؤلفون: Mark W. Hounslow, Samuel E. Harris, Vassil Karloukovski, Atle Mørk

المصدر: Norwegian Journal of Geology

مصطلحات موضوعية: Geophysics, Geochemistry and Petrology, Paleontology, Geology, Oceanography

الوصف: Combining magnetostratigraphy and organic carbon isotopic changes has allowed a more precise position to be determined for the base of the Norian in Svalbard successions. A magnetostratigraphy is constructed from two sections (Binnedalen, Nørdstefjellet) from the northern end of Hopen Island (southern Svalbard archipelago), from the De Geerdalen Formation and the lowest part of the Flatsalen Formation. A magnetostratigraphy is also determined from the upper part of the De Geerdalen Formation on Wilhelmøya (eastern Svalbard). On Hopen a composite magnetostratigraphy tied to the Binnedalen section was constructed using correlation based on detailed photographs and logs of the adjacent cliffs. The palaeomagnetic data shows a strong Brunhes overprint, but mean palaeomagnetic directions pass the reversal test and are consistent with other Triassic virtual geomagnetic palaeopole data from Svalbard. The palaeomagnetic signal is carried by magnetite. Organic carbon isotope data identifies three negative excursions in the Hopen succession— below the Hopen Member, within the upper Hopen Member and at the De Geerdalen –- Flatsalen formation boundary. The carbon isotope variations are correlated to Tuvalian (late Carnian) excursions seen in lower paleolatitude sections. The magnetostratigraphy of the Isfjorden Member from Wilhelmøya and central Spitsbergen are similar, and when integrated with the carbon isotope stratigraphy suggests that the Isfjorden Member is not equivalent to the units of the De Geerdalen Formation exposed on northern Hopen, but is older. These relationships suggest the sequence boundary at the base of the Wilhelmøya Subgroup probably cuts down into mid Tuvalian age strata of the De Geerdalen Formation in Spitsbergen and Wilhelmøya, but only into the latest Tuvalian strata on Hopen. A revised Tuvalian geomagnetic polarity scale is also proposed, linked to the carbon isotope excursions.

وصف الملف: archive; application/x-zip-compressed

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d7454207fe4a7b726a456c34a1dbcd2Test
https://doi.org/10.17850/njg102-1-4Test

المؤلفون: Paul Montgomery, Mark W. Hounslow, Krystian Wójcik, Kenneth T. Ratcliffe, Samuel E. Harris, Nigel Woodcock, Jerzy Nawrocki

المصدر: Palaeogeography, Palaeoclimatology, Palaeoecology

مصطلحات موضوعية: 010506 paleontology, Provenance, Red beds, Event (relativity), Geochemistry, Paleontology, Sediment, Oxygenation, sub-02, 010502 geochemistry & geophysics, Oceanography, equipment and supplies, 01 natural sciences, Upwelling, Aeolian processes, East European Craton, Ecology, Evolution, Behavior and Systematics, Geology, 0105 earth and related environmental sciences, Earth-Surface Processes

الوصف: Widespread marine red beds in the European Telychian (lower-Silurian) are one expression of an interval of unusually widespread oxic conditions in low palaeolatitude Silurian seas. This work examines in detail the geochemical and magnetic susceptibility record of cores from southern Poland, which also express the Telychian oxygenation event in grey-mudstones. The geochemical data provide an evaluation of redox conditions, palaeoweathering, sediment provenance, primary palaeoproductivity and upwelling. Sediment provenance is evaluated against possible sources on the East European Craton. The data suggest that the magnetic susceptibility is carried by both paramagnetic Fe-silicates and Fe-oxides. Magnetic data are supplemented by magnetic hysteresis and isothermal remanent magnetisations, and mineralogical data on selected samples. In Poland the oxygenation event is clearly expressed in larger Fe2O3 and magnetic susceptibility, caused by enhanced palaeoweathering, changes in sediment provenance and a redox influence on the preservation of Fe-oxides. A much briefer oxygenation event is detected in the upper Rhuddanian. Palaeoproductivity fluxes indicate that the Telychian oxygenation event was caused by a reduction in primary oceanic palaeoproductivity, possibly linked to a reduction in nutrient delivery to the margin of the East European Craton, inferred to be caused by increased aridity. The increased aridity stimulated enhanced delivery of Fe-enriched aeolian dust from soils, generating a magnetic susceptibility and Fe2O3 expression of the Telychian oxygenation event.

وصف الملف: application/x-zip-compressed; application/pdf; spreadsheet; text

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9372b771fc3890b02966ba68bd7bc5d3Test

المؤلفون: Mark W. Hounslow, Paul Montgomery, Nigel Woodcock, Jerzy Nawrocki, Kenneth T. Ratcliffe, Samuel E. Harris, Krystian Wójcik

المصدر: Palaeogeography, Palaeoclimatology, Palaeoecology

مصطلحات موضوعية: 010506 paleontology, Lithology, Polarity (physics), Paleontology, sub-02, Biostratigraphy, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, Earth's magnetic field, Chemostratigraphy, Stage (stratigraphy), Cenozoic, Ecology, Evolution, Behavior and Systematics, Magnetostratigraphy, Geology, 0105 earth and related environmental sciences, Earth-Surface Processes

الوصف: © 2021 Elsevier B.V. Magnetostratigraphic studies in the Silurian are absent, and what is understood about the geomagnetic polarity during this time is based on polarity bias-type data from palaeopole-type studies. We provide the first composite magnetic polarity record through the Lower Silurian (Llandovery) from the magnetostratigraphy of six sections. These are integrated with graptolite biostratigraphy and some carbon isotope chemostratigraphy. The palaeomagnetic signal is carried by both haematite and magnetite, with haematite dominating in red-coloured mudstones and mostly magnetite in non-red lithologies. The influence of possible tectonic disruption of the fabric is assessed using anisotropy of magnetic susceptibility. Only the most thermally mature section at Backside Beck shows the imprint of initial tectonic fabric formation. The Llandovery is divided into 6 major normal-reverse-polarity chron couplets (referred to as LL1 to LL6). An additional longer, exclusively normal polarity interval (referred to as WE1n), beginning in Telychian Stage slice Te3, runs into the lower Sheinwoodian. Within these five polarity couplets there are 10 further submagnetozones, and 10 tentative submagnetozones. Average reversal frequency (including the tentative submagnetozones) was ca. 3.0 Myr−1 in the Early Silurian, which is probably an underestimate, due to insufficient sampling density in some parts of the Rhuddanian and Aeronian. This reversal frequency is similar to that in the late Cenozoic, indicating the future potential utility of magnetostratigraphy for high-resolution correlation and dating in the Early Silurian.

وصف الملف: application/x-zip-compressed; archive; application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97dc5887fbb12e6f670110e9030b81b3Test

المؤلفون: Kevin Kearney, Roselyn Ware, Tom Hill, Derek Hamilton, Rosie Everett, Rebecca Cribdon, Robin G. Allaby, Tim Kinnaird, John E. Whittaker, Matt Law, Alexander J. Finlay, Mohammed Ben Sharada, Richard Bates, Richard Telford, Merle Muru, Ben Stern, Benjamin R. Gearey, Vincent Gaffney, James Walker, Martin Bates, Logan Kistler, Samuel E. Harris, Catherine M. Batt, Simon Fitch, Sarah J. Davies

المساهمون: European Research Council, University of St Andrews. School of Earth & Environmental Sciences, University of St Andrews. Coastal Resources Management Group, University of St Andrews. Centre for Ancient Environmental Studies, University of St Andrews. Marine Alliance for Science & Technology Scotland, University of St Andrews. Scottish Oceans Institute, University of St Andrews. St Andrews Sustainability Institute

المصدر: Geosciences
Volume 10
Issue 7

مصطلحات موضوعية: 010506 paleontology, Palaeoenvironment, F800, Woodland, Seismic, Storegga, 01 natural sciences, F900, law.invention, Head (geology), 03 medical and health sciences, Paleontology, law, sedimentary ancient DNA, QE, 14. Life underwater, Radiocarbon dating, Doggerland, Palaeolandscape, Mesolithic, Holocene, 030304 developmental biology, 0105 earth and related environmental sciences, geochemistry, GC, 0303 health sciences, GB, GE, palaeoenvironment, Tsunami, palaeolandscape, Sedimentary ancient DNA, Lithostratigraphy, Geomorphology, DAS, geomorphology, Geochemistry, GN, seismic, General Earth and Planetary Sciences, Sedimentary rock, tsunami, North Sea, Geology, GE Environmental Sciences

الوصف: This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (ERC funded project No. 670518 LOST FRONTIERS, https://europa.eu/european-union/index_enTest, https://lostfrontiers.teamapp.comTest/). The project gratefully acknowledges the support of the Estonian Research Council (https://www.etag.ee/en/estonian-research-councilTest/, Grant number: PUTJD829). PGS (https://www.pgs.comTest/) is acknowledged through provision of data used in this paper under license CA-BRAD-001-2017. Doggerland was a landmass occupying an area currently covered by the North Sea until marine inundation took place during the mid-Holocene, ultimately separating the British landmass from the rest of Europe. The Storegga Event, which triggered a tsunami reflected in sediment deposits in the northern North Sea, northeast coastlines of the British Isles and across the North Atlantic, was a major event during this transgressive phase. The spatial extent of the Storegga tsunami however remains unconfirmed as, to date, no direct evidence for the event has been recovered from the southern North Sea. We present evidence of a tsunami deposit in the southern North Sea at the head of a palaeo-river system that has been identified using seismic survey. The evidence, based on lithostratigraphy, geochemical signatures, macro and microfossils and sedimentary ancient DNA (sedaDNA), supported by optical stimulated luminescence (OSL) and radiocarbon dating, suggests that these deposits were a result of the tsunami. Seismic identification of this stratum and analysis of adjacent cores showed diminished traces of the tsunami which was largely removed by subsequent erosional processes. Our results confirm previous modelling of the impact of the tsunami within this area of the southern North Sea, and also indicate that these effects were temporary, localized, and mitigated by the dense woodland and topography of the area. We conclude that clear physical remnants of the wave in these areas are likely to be restricted to now buried, palaeo-inland basins and incised river valley systems. Publisher PDF

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a29f89378f7a1666c6885bf2ade7a3f6Test
https://hdl.handle.net/10023/20254Test

المؤلفون: Barbara Horn, Tamara Leskovar, Nejc Dolinar, Matija Črešnar, Branko Mušič, Samuel E. Harris, Catherine M. Batt, Manca Vinazza

المصدر: Arheološki vestnik. 71

مصطلحات موضوعية: Archeology, 010504 meteorology & atmospheric sciences, 010502 geochemistry & geophysics, 01 natural sciences, Geology, 0105 earth and related environmental sciences

الوصف: Prazgodovinski kompleks Cvinger pri Dolenjskih Toplicah leži na strateški točki na prehodu med Dolenjsko in Belo krajino. Tukaj odkrite najdbe so imele pomembno vlogo pri opredelitvi mlajšega halštatskega obdobja v jugovzhodnih Alpah. Prav tako pomembno je odkritje železarsko-talilniškega območja. V zadnjih letih pa je bil Cvinger predmet interdisciplinarnih raziskav, ki so povezale sodobne tehnike daljinskega zaznavanja, kot so zračno lasersko skeniranje in geofizikalne meritve, s tradicionalnimi arheološkimi metodami. Rezultati so pripeljali do novih dognanj o celotnem kompleksu, vključno z natančnejšo datacijo talilniškega območja, pridobljeno z metodo arheomagnetnega datiranja.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::6410e2c36a422fefe2f9ec993ab12263Test
https://doi.org/10.3986/av.71.19Test

المؤلفون: Ben Stern, Martin Bates, Derek Hamilton, Logan Kistler, Rebecca Cribdon, Sarah J. Davies, Richard Telford, Kevin Kearney, Merle Muru, Rosie Everett, John E. Whittaker, Matt Law, Vincent Gaffney, Benjamin R. Gearey, Catherine M. Batt, Roselyn Ware, James Walker, Tim Kinnaird, Simon Fitch, Samuel E. Harris, Mohammed Ben Sharada, Tom Hill, Robin G. Allaby, Richard Bates

مصطلحات موضوعية: 010506 paleontology, 0303 health sciences, Sediment, Woodland, 01 natural sciences, law.invention, Head (geology), 03 medical and health sciences, Paleontology, 13. Climate action, law, Sedimentary rock, 14. Life underwater, Radiocarbon dating, Doggerland, Geology, Holocene, 030304 developmental biology, 0105 earth and related environmental sciences, Stratum

الوصف: Doggerland was a land mass occupying an area currently covered by the North Sea until marine inundation took place during the mid-Holocene, ultimately separating the British land mass from the rest of Europe. The Storegga Slide, which triggered a tsunami reflected in sediment deposits in the Northern North Sea, North East coastlines of the British Isles and across the North Atlantic, was a major event during this transgressive phase. The spatial extent of the Storegga tsunami however remains unconfirmed because to date no direct evidence for the event has been recovered from the southern North Sea. We present evidence that Storegga associated deposits occur in the southern North Sea. Palaeo-river systems have been identified using seismic survey in the southwestern North Sea and sedimentary cores extracted to track the Mid Holocene inundation. At the head of one palaeo-river system near the Outer Dowsing Deep, theSouthern River, we observed an abrupt and catastrophic inundation stratum. Based on lithostratigraphic, macro and microfossils and sedimentary ancient DNA (sedaDNA) evidence, supported by optical stimulation luminescence (OSL) and radiocarbon dating, we conclude these deposits were a result of the Storegga event. Seismic identification of this stratum to adjacent cores indicated diminished traces of the tsunami, largely removed by subsequent erosional processes. Our results demonstrate the catastrophic impact of Storegga within this area of the Southern North Sea, but indicate that these effects were temporary and likely localized and mitigated by the dense woodland and topography of the area. We conclude clear physical remnants of the wave are likely to be restricted to inland basins and incised river valley systems.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9788e34b9777bd28aa4f5b794e8b6c40Test
https://doi.org/10.1101/2020.02.24.962605Test

المؤلفون: Nigel Woodcock, Paul Montgomery, Mark W. Hounslow, Krystian Wójcik, Kenneth T. Ratcliffe, Jerzy Nawrocki, Samuel E. Harris

المصدر: Palaeogeography, Palaeoclimatology, Palaeoecology

مصطلحات موضوعية: 010506 paleontology, Lithology, Paleontology, Fold (geology), sub-02, Biostratigraphy, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, Tremadocian, Stratigraphy, Marl, Ordovician, Ecology, Evolution, Behavior and Systematics, Geology, 0105 earth and related environmental sciences, Earth-Surface Processes, Chronology

الوصف: Magnetostratigraphic studies of the Ordovician provide evidence for the nature of core-mantle boundary interactions, and provide means for dating and correlation across differing environmental regimes. We provide new magnetostratigraphic data from the Middle and Upper Ordovician, compiling this into a polarity chronostratigraphic scale for the Dapingian to Hirnantian interval. The new data are derived from the Backside Beck and Cheney Longville sections in Britain, the Mojcza section in Poland and two cores from Poland and Lithuania. The chronology is provided by existing biostratigraphy, principally based on chitinozoans and conodonts for the Ordovician. Correlations between sections are supported by carbon isotope stratigraphy linked to Baltic isotopic zonations, along with lithological and local magnetic susceptibility correlations in Polish cores. The palaeomagnetic signal is carried by both haematite and magnetite, with haematite dominating in red-coloured lithologies (marls and limestones) and magnetite in non-red mudstones and limestones. A positive reversal test (class C) in the Cheney Longville section and positive fold tests in the Backside Beck section provide validation of the isolation of a primary palaeomagnetic signal. Palaeomagnetic directions from cores were re-oriented using Kiaman-age and Brunhes overprints. These new datasets in combination with existing Middle Ordovician data provides a near-complete magnetic polarity chronostratigraphic scale through the Middle and Upper Ordovician. Brief normal-polarity magnetozones extend well into the later parts of what has been considered the Moyero Superchron, which started in the late Tremadocian. Reversal frequencies for the mid and late Ordovician are 1.7 and 1.5 Myr−1 respectively, although that for the late Ordovician may be an underestimate.

وصف الملف: application/pdf; text

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9fb40006eab3a555dd2ab8ae7593d8aTest
http://eprints.esc.cam.ac.uk/5997/1/1-s2.0-S0031018221000109-main.pdfTest