Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 79 for “"Early Holocene"”.
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Variability in the Debitage of the Early Holocene Lithic Assemblages of the Sanders (45KT315) Site
This thesis applies an analytic strategy based on a Darwinian evolutionary theoretical framework to measure variation in the cost and performance of stone tool manufacture and use at the Sanders (45KT315) site over time. Using this model, this thesis identified the selective conditions present in …
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The Relationship Between Paleoindian Site Location and Terminal Pleistocene/Early Holocene Lake-Level Fluctuations in the Lahontan basin, Nevada
… with extinct lakes and wetlands, suggesting that early groups had a special affinity for lacustrine settings. The Lahontan basin of western Nevada contains a rich record of Terminal Pleistocene and Early Holocene (TP/EH) (~16,000 - 8300 cal BP) lake-level fluctuations and Paleoindian occupation. …
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Archaeobotanical and palaeoecological assessment of three freshwater shell middens dating to the early Holocene, Yongjiang River, Guangxi, southern China
… studied shell middens were all used during the early Holocene between c. 10,100-9000 cal BP. Each shell midden was used for a maximum of 390 years to 1110 years, although probably for much shorter occupation periods. The periods of use for the three sites show significant overlaps. Phytolith and …
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Archaeobotanical and palaeoecological assessment of three freshwater shell middens dating to the early Holocene, Yongjiang River, Guangxi, southern China
… studied shell middens were all used during the early Holocene between c. 10,100-9000 cal BP. Each shell midden was used for a maximum of 390 years to 1110 years, although probably for much shorter occupation periods. The periods of use for the three sites show significant overlaps. Phytolith and …
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A central Texas drying event identified at the Younger Dryas-early Holocene transition using coupled speleothem 𝛿¹³C-¹⁴C analysis
… warming/drying trend from the YD through the Holocene, however, the timing and magnitude of changes in regional moisture and temperature conditions are poorly constrained. We use moisture proxies from a central Texas stalagmite record (McN-1) collected in the Edwards aquifer (an important …
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Late Pleistocene and Early Holocene Small Mammals in South West Britain: Environmental and Taphonomic Implications, and their role in Archaeological Research
… changes taking place in the Late Pleistocene and early Holocene:<br/>- To understand the processes by which small mammal remains were deposited in the caves examined:<br/>- To demonstrate the value of small mammal studies as an archaeological tool.<br/><br/>All identifiable small mammal remains …
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An investigation into the causes for the reduction in the variability of the El Niño-Southern Oscillation in the early Holocene in a global climate model
A large body of evidence shows that during the early Holocene the variability on interannual timescales in the tropical Pacific was much reduced in comparison to today. We investigate a possible cause for this using output from a Global Climate Model forced by present day and early Holocene …
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Paleoindian technological provisioning in the western Great Basin
… aims to understand human adaptation during the early Holocene through characterization of the lithic assemblages from two stemmed point sites in western Nevada, the Sadmat and Coleman sites. These sites are located in the Lahontan basin and possess data sets unique and compelling in addressing …
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Late Pleistocene Sciurids from Kokoweef Cave
… were identified from the late Pleistocene-early Holocene Kokoweef Cave paleofauna. This fauna was the first documentation of T. minimus, T. palmeri and S. townsendii from the Pleistocene of the Mohave Desert. The 30-ft sedimentary sequence apparently recorded the mid-to late-Wisconsian …
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Holocene sea-level changes along the Channel coast of South-west England
A Holocene relative sea-level (RSL) history for the south Devon coast is reconstructed through an analysis of twelve cores extracted from the coastal back-barrier environments of Bantham Sands, North Sands, Slapton Sands and Blackpool Sands. Foraminifera preserved in the sediments are assigned an …
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Holocene Fire History Reconstruction of a Mid-Evaluation Mixed-Conifer Forest in the Eastern Cascades, Washington
… Charcoal results show low fire activity in the early Holocene and the first half of the middle Holocene. After ca. 6000 calendar years before present (cal yr BP) fire activity was high until ca. 500 cal yr BP. Pollen analysis indicates a woodland environment existed at the site in the early …
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Pleistocene geology of the Comstock-Sebeka area, west-central Minnesota
… Pleistocene glacial sediment and Pleistocene and Holocene fluvial, lacustrine, eolian, and bog sediment.</p> <p>Four geomorphic districts are recognized. The flat Lake-Plain District is underlain by sand, silt, and clay that was deposited as offshore sediment in the Lake Agassiz basin in Early …
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Palaeoceanographic conditions and palaeoproductivity changes from the sub-Antarctic island South Georgia since the late deglacial, using marine micropalaeontology and geochemistry
… shelf spanning the late deglacial through the Holocene. South Georgia lies within the path of the Antarctic Circumpolar Current (ACC) and the Southern Hemisphere Westerly Winds (SWW), south of the current position of the Antarctic Polar Front and encircled by the Southern ACC Front (SACCF). …
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The record of magma storage conditions in mineral compositions below a glacial to ice-free Askja volcano, Iceland
… classified into one preglacial, six glacial, one Early Holocene and thirteen historical eruptive units. The purpose of this study was to use mineral compositions and textures from basaltic lavas to reconstruct magma chamber conditions before, during and after glaciation. In this study, 36 lava …
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Environmental and climatic aspects of the early to mid Holocene calcareous tufa and land mollusc fauna in southern Sweden
… to have occurred at several sites during the early Preboreal and Boreal [11,500-7,800 calibrated years BP (cal. BP)]. A tufa deposit was also recorded at one site dating to the Subboreal period (5,600-5,400 cal. BP). These periods were characterised by low lake levels in southern Sweden, …
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High-Resolution Record of Vegetation and Climate Change During the Holocene in Southwestern Québec
… history of the region over the course of the Holocene. The record shows an initial open spruce woodland, the establishment of the boreal and mixed conifer-hardwood forest into the area, as well as the expansion and contractions of tree populations in response to climate variability during the …
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Algal and protozoan response to Holocene climate change and anthropogenic impact: a case study from Sluice Pond, MA
… contains a diverse dinocyst record since the early Holocene. High dinocyst concentrations, including morphotypes not previously described, as well as the preservation of several specimens of cellulosic thecae are attributed to low dissolved oxygen (DO) in the basin. The fossil protozoan record …
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An Experimental Program to Evaluate Proposed Functions of Crescents from the Western United States
… bifaces associated with terminal Pleistocene/early Holocene assemblages in the western U.S. and are commonly found near relict lakeshores, marshes, and the Pacific Coast. Many hypotheses regarding crescents' function have been proposed but it has remained a mystery for over a century. This …
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The Geologic and Archaeological History of the Dickie Carr Site 41PR26
… were identified that record the Pleistocene-Holocene transition. The buried lower unit is comprised of terrace, floodplain, and channel deposits with extensive pedogenesis. The unit is Late Pleistocene in age and contains the remains of Mammuthus columbi. The upper stratigraphic unit is …
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