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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Europe
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Alps
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Eastern Alps
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Dinaric Alps (1)
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Carpathians (1)
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Southern Europe
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Dinaric Alps (1)
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Greece
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Hellenic Arc (1)
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Pindus Mountains (1)
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Italy
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Calabria Italy (1)
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Vardar Zone (1)
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Western Europe
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United Kingdom
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Great Britain
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England
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Lake District (1)
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fossils
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Invertebrata
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Protista
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microfossils (1)
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Plantae
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algae
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nannofossils (1)
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thallophytes (1)
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geochronology methods
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paleomagnetism (2)
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geologic age
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Cenozoic
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Quaternary
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Pleistocene (1)
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Mesozoic
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Jurassic (1)
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Triassic
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Middle Triassic
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Ladinian (1)
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Paleozoic
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Ordovician
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Upper Ordovician
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Caradocian
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Borrowdale Volcanic Group (1)
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Primary terms
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Cenozoic
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Quaternary
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Pleistocene (1)
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deformation (1)
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Europe
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Alps
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Eastern Alps
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Dinaric Alps (1)
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Carpathians (1)
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Southern Europe
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Dinaric Alps (1)
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Greece
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Hellenic Arc (1)
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Pindus Mountains (1)
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Italy
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Calabria Italy (1)
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Vardar Zone (1)
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Western Europe
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United Kingdom
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Great Britain
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England
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Cumbria England (1)
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Wales
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Welsh Basin (1)
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Invertebrata
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Protista
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Foraminifera (1)
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Mesozoic
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Jurassic (1)
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Triassic
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Middle Triassic
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Ladinian (1)
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metasomatism (1)
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paleogeography (3)
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paleomagnetism (2)
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Paleozoic
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Ordovician
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Upper Ordovician
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Caradocian
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Borrowdale Volcanic Group (1)
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Plantae
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algae
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nannofossils (1)
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plate tectonics (2)
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sea-floor spreading (1)
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sea-level changes (1)
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sedimentary rocks
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clastic rocks
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mudstone (1)
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sedimentation (1)
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sediments
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clastic sediments (1)
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tectonics
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sedimentary rocks
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sedimentary rocks
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clastic rocks
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mudstone (1)
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siliciclastics (1)
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sediments
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sediments
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clastic sediments (1)
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siliciclastics (1)
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Oligocene–Miocene magnetostratigraphy of deep-sea sediments from the equatorial Pacific (IODP Site U1333)
Abstract We present palaeomagnetic results from the Oligocene through Miocene part of the Integrated Ocean Drilling Program Site U1333 (1030.996′N, 138°25.159′W), which is located in 4853 m-deep water over seafloor with an estimated crustal age of 46 Ma. Detailed magnetostratigraphic investigations are essential to provide a sound age model for the study of the palaeoclimatic and palaeo-oceanographic history of the Cenozoic of the Equatorial Pacific and to improve the database of Pacific magnetostratigraphy. Rock magnetic measurements were carried out at 1 cm resolution on 81 U-channel samples from the spliced section with the goal of extracting a high-resolution record of the magnetostratigraphy. Stepwise demagnetization of the natural remanent magnetization yielded a well-defined magnetostratigraphy over a time interval of approximately 10 Ma between the base of Chron C6n (19.722 Ma) and the middle of Chron C11r (>29.9 Ma) and identification of the Oligocene–Miocene transition at the base of Subchron C6Cn.2n. The palaeomagnetic data are characterized by shallow inclinations, and by 180° alternations in declinations downhole, reflecting magnetic polarity zones. The relatively high temporal resolution allowed for the identification of three possible excursions previously not identified on the geomagnetic polarity time scale, which were recorded in Subchrons C8n.1r and C11n.2n and in Chron C11r.
Abstract A c. 50 m thick section located in the Crotone Basin (southern Italy) was investigated using oxygen isotopes, pollen and planktonic foraminifera. The section records two complete transgressive-regressive cycles mainly driven by glacio-eustasy. Biostratigraphy and oxygen isotope chronology indicate that the section spans from Marine Isotope Stage (MIS) 22 ( c. 0.87 Ma) to MIS 18.3 ( c. 0.73 Ma), thus straddling the Matuyama-Brunhes (M-B) boundary which occurs in the middle of MIS 19. The rich pollen assemblages provide a unique record of the vegetation in the central Mediterranean during the Early-Middle Pleistocene climatic transition. Interglacials are characterized by a mesothermic vegetation similar to the present day, whereas a rain-demanding conifer forest dominates the glacials of MIS 20 and MIS 18. This is unexpected because it is generally considered that during the Pleistocene, glacials in central Mediterranean were characterized by steppe (arid) conditions. By contrast, arid conditions occur during the deglaciations. These results are inconsistent with the widespread practice of linking glacials with arid conditions in the central Mediterranean during Pliocene and Early Pleistocene times. This study emphasizes the need to establish more accurate land-sea correlation.