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Showing 1 to 13 of 13 for “"Late Neogene"”.
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Quantitative Studies of Late Neogene Coastal Environments Using Bivalve Subfossil and Fossil Assemblages
Coastal environments are important in many ways: they provide food and energy for coastal communities, have a variety of unique biologic habitats, and influence global climate. These environments can change due to either anthropogenic or natural phenomena over a wide range of time scales. However, …
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Sequence stratigraphic, paleoenvironmental, and chronological analysis of the late neogene Wanganui River section, Wanganui basin
… and offers the potential to examine the entire late Miocene to late Pliocene succession in the western half of Wanganui Basin. For the first time the Wanganui River section has been divided into five predominantly planktic foraminiferal biozones (Globorotalia conomiozea zone, G. punticulata …
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<em>Vitis</em> Seeds (Vitaceae) from the Late Neogene Gray Fossil Site, Northeastern Tennessee, USA.
… recovered from the Gray Fossil Site (7-4.5 Ma, latest Miocene-earliest Pliocene) northeastern Tennessee. Morphologically, all fossil seeds correspond to the extant subgenus <em>Vitis</em> (genus <em>Vitis</em>) of the Vitaceae based on the smooth dorsal surface with a centrally positioned …
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Analysis of the central Hawke's Bay sector of the Late Neogene forearc basin, Hikurangi margin, New Zealand
… Island, New Zealand, that developed during the Late Miocene to present. An area of about 5 700 kmsup2; in central Hawke's Bay has been geologically mapped at 1:50 000 scale as part of an analysis of the Late Miocene-Early Pleistocene basin fill. A substantially revised lithostratigraphic …
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The Dynamics of the Late Neogene Antarctic Ice Sheets in the Central Ross Sea using a Multianalytical Approach
… sheet history in the central Ross Sea since the late Miocene, the provenance of glacial till from IODP expedition 374 site U1522 was assessed using a suite of three analyses. A total of 3,869 zircons, between 250-63 microns in size, from sixteen different cores were measured for U-Pb isotopes via …
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Characteristics and evolution of a dynamic prograding continental margin: the late Neogene Giant Foresets Formation, northern Taranaki Basin, New Zealand
… of a region-wide unconformity between Miocene (Late Tongaporutuan to Late Kapitean) and Pliocene (Early to mid Opoitian) strata, prior to deposition of the Giant Foresets Formation. This is expressed as a paraconformity across much of the northern part of the Western Stable Platform (Ariki …
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Late Neogene Uplift of the Fairweather Ground on the Basis of Bathymetric and Seismic Data from the Gulf of Alaska
… using public domain seismic reflection data. The late Tertiary and early Quaternary sections of the Yakataga Formation record a glacial/ interglacial climate change sequence with increasing rates of sedimentation (175 meters per million years to 4000 meters per million years). The foreland basin …
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A multi-proxy study of the Kalkkop impact Crater Lake deposits in south-central South Africa: implications for late neogene climate evolution
The Kalkkop Crater Lake deposit formed as a result of a meteorite impact, and is situated ~51 km southwest of Graaff-Reinet in the Southern part of South Africa. The structure is about 650 m wide, and contains 90 m of lake deposits that are mainly carbonate precipitates. A 90 m sediment core from …
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Correlation of earthquakes with seismogenic faults along the Northern Arizona Seismic Belt, southwestern margin of the Colorado Plateau.
… near Kanab in southernmost Utah to the Mogollon Plateau south of Flagstaff, Arizona. The NASB defines the seismic boundary between the Colorado Plateau and the Basin and Range Provinces. This research attempts to spatially correlate four M≥4.0 earthquakes that had epicenters in the Kanab-Fredonia …
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Deciphering climatic controls on sedimentation in a tectonically active area, Cyprus
The late Neogene to Quaternary of Cyprus is considered to be a tectonically active period coeval with major climatic change. Uplift, associated with the activities of the supra-subduction zone to south of island was concomitant with global cooling, the expansion of the Northern Hemisphere Ice …
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LATE MIOCENE AND PLIOCENE PALEOCEANOGRAPHY OF THE LOW LATITUDE NORTHERN HEMISPHERE AND ITS IMPLICATIONS FOR FUTURE CLIMATE CHANGE
The late Neogene represents an exceptionally dynamic period in Earth history during which the Northern Hemisphere has transitioned from a warmer, more equable climate to a cooler, more transient state characterized by waxing and waning continental ice sheets. While geographical distal, the tropical …
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Cenozoic Sedimentary Evolution of the Helmville Basin, West-Central Montana
… sedimentary and volcanic fill of Paleogene and Neogene age, along with abundant Quaternary sediment. The purpose of this study is to document the geologic evolution of the Helmville basin through a combination of field-based geologic mapping and sedimentologic characterization and to assess the …
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Cenozoic Sedimentary Evolution of the Helmville Basin, West-Central Montana
… sedimentary and volcanic fill of Paleogene and Neogene age, along with abundant Quaternary sediment. The purpose of this study is to document the geologic evolution of the Helmville basin through a combination of field-based geologic mapping and sedimentologic characterization and to assess the …