Download or read book Application of Intertidal Salt marsh Foraminifera to Reconstruct Late Holocene Sea level Change at Kariega Estuary South Africa written by Kate Leigh Strachan and published by . This book was released on 2013 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantifying Holocene Sea level Change Using Intertidal Foraminifera written by Benjamin P. Horton and published by . This book was released on 2006 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salt-marsh foraminifera have been used to reconstruct Holocene sea-level changes from coastlines around the world. In this work, we compile the results of surface foraminiferal surveys from fifteen study sites located on the east, south and west coasts of Great Britain, and the west coast of Ireland. These data, which comprise 236 samples and 84 species, are used to summarize the contemporary distributions of intertidal foraminifera around the British Isles, and to examine the environmental controls governing them.

Download or read book Salt Marsh Foraminiferal Proxy Record of Late Holocene Sea level Rise South Island New Zealand written by Brigida Orioli Figueira and published by . This book was released on 2012 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Marsh Foraminifera to Construct a Late Holocene Sea Level History of the Raritan Estuary New Jersey written by Steven B. Lomax and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Extension of the Late Holocene Sea level Record in North Carolina USA written by Jessica Kegel and published by . This book was released on 2015 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Future sea-level rise will dramatically affect coastal landscapes and populations. The coast of North Carolina (USA) is particularly vulnerable to sea-level rise because its low-lying coastal plain is expansive, has a low gradient, provides significant ecosystem services and is economically important. In order to understand how future sea-level rise may affect the coast, it is necessary to study past sea-level rise. Widespread salt-marshes compose much of North Carolina's coastal system, providing an excellent environment from which to produce relative sea-level reconstructions using salt-marsh foraminifera, whose distribution is controlled by tidal elevation. Distinctive assemblage zones related to different tidal ranges can be recognized in salt-marsh foraminiferal assemblages, allowing them to be used as a proxy for reconstructing sea level as sea-level indicators. Foraminiferal assemblages from surface samples along two transects at Sand Hill Point on Cedar Island, North Carolina added to an existing modern training set of paired observations of foraminiferal assemblages and tidal elevation; these data provide local analogues for interpreting fossil assemblages using a locally weighted-weighted average (LWWA) regression model. Foraminiferal assemblages preserved in a radiocarbon-dated core of salt-marsh peat from Sand Hill Point were used to produce a continuous, high-resolution late Holocene relative sea-level reconstruction. The existing late Holocene RSL reconstruction from North Carolina is based on two sites: Sand Point on Roanoke Island and Tump Point on Cedar Island. The Sand Point record spans the last ~2200 years, but the Tump Point record spans only the last ~1000 years. Therefore, the sea-level history described from 200 BC to 1000 AD is based on only one site. The new sea-level reconstruction from Sand Hill Point extends the existing record from nearby Tump Point, NC by 1400 years, producing a high resolution, continuous record of sea-level change spanning 1500 BC - 1915 AD. This new record tests whether patterns and rates of late Holocene sea-level changes reconstructed elsewhere in North Carolina are consistent throughout the region. The calculated average rate of relative sea-level rise for Sand Hill Point of 0.7 mm/year is consistent with patterns of regional rates along the US Atlantic coast, which may be partly attributed to isostatic response to deglaciation of the Laurentide Ice Sheet.

Download or read book Agglutinated Foraminifera as Indicators of Salt Marsh Development in Relation to Late Holocene Sea Level Rise Great Marshes at Barnstable Massachusetts written by Sacha Rijk and published by . This book was released on 1995 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Intertidal Salt marsh Foraminifera as Sea level Indicators written by Kate Leigh Strachan and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distributions and Population Dynamics of Marsh Estuarine Foraminifera with Applications to Relocating Holocene Sea Level written by David B. Scott and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconstruction of Holocene Sea level Changes Using Foraminifera and Vertical Tectonic Movements Ohiwa Harbour Bay of Plenty New Zealand written by Emma Wiggins and published by . This book was released on 2002 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Reconstruction of Holocene Sea Level Change Between 6 180 to 3 640 Cal Years BP for the Gordano Valley Using Foraminifera written by Joel Pimm and published by . This book was released on 2007 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative vertical zonation of salt marsh foraminifera for reconstructing former sea level an example from New Jersey USA written by A.C. Kemp and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Salt marsh Foraminifera and Their Potential for Sea level Studies in the North Sea Region written by Katharina Müller-Navarra and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Foraminiferal Sedimentological and Geochemical Indications of Holocene Environmental Change in Pamlico Sound North Carolina written by Jennifer A. Foley and published by . This book was released on 2007 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book LATE HOLOCENE SEA LEVEL CHANGE written by Cheuk-Yan Tam and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Late Holocene Sea Level Changes in the East Coast of the Malay-Peninsula" by Cheuk-yan, Tam, 譚卓欣, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: The relative sea level (RSL) history of Terengganu, east coast of the tectonically stable Malay-Peninsula, of the last 2500 years was reconstructed from dated mangrove sediments. Microfossils, particularly pollens, were used for estimating the indicative meaning of each sea-level index point. Pollen assemblages representing the top end of mangrove zone and the low end of swamp zone have an indicative meaning of 0.260.23 m and 0.330.26 m above local mean sea level respectively. The sea-level index points produced have all shown negative tendency of change, as the pollen assemblages have revealed a general environmental change towards a more freshwater condition. The more saline mangrove vegetation was graded into lagoon/riverine Nypa frusticans, or freshwater swamp Myrtaceae or Cyperaceae, depending on the distance of sampling sites from the palaeo-beach ridges. The reconstructed RSL has indicated a RSL fall to below the present mean sea level roughly since the last 1500 years, reaching a lowstand with a minimal value of -1.280.26 m at 920-750 cal. year BP, before a transgression took place between 920-280 cal. year BP, for RSL to return back to the present level. This observation departs from the steady RSL decline to present as predicted by geophysical model. This RSL fall suggests that, in addition to ocean siphoning and continental levering, the late Holocene RSL change in the far-field regions is also influenced by climatic driving forces such as Neo-glacial ice sheet expansion. The effects of these climatic factors have been recorded in some near- and intermediate- field regions. This is the first time that these effects are reported from a far-field region, the Malay-Peninsula. DOI: 10.5353/th_b5576757 Subjects: Sea level - Malay Peninsula Paleoceanography - Holocene

Download or read book Quantifying Holocene Sea leval Change Using Intertidal Foraminifera written by Benjamin P. Horton and published by . This book was released on 2006 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Taphonomy of Foraminifera and Bioturbation in Marshes written by Scott P. Hippensteel and published by . This book was released on 2000 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Viability of Using Foraminifera from Mersey Estuary Saltmarsh Sediments to Reconstruct Former Sea Level written by Hayley Mills and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The viability of using a foraminifera-based transfer function method to reconstruct the local relative sea-level for the Mersey Estuary was assessed in this study, which has not been previously investigated in the UK in the context of application in a strongly macrotidal setting. A total of 105 surface samples were collected across two saltmarshes. Foraminiferal analysis was carried out, along with several environmental variables (organic matter content, salinity, pH, and grain size) to establish the species distribution of foraminifera and their relationship with elevation. Two main zonations were found: a high-to-middle marsh zone occupied by Haplophragmoides spp., J. macrescens and M. fusca; and a low marsh zone composed of increasing numbers of calcareous species including Elphidium spp.; and Haynesina spp. Foraminiferal distributions along each transect were found to be controlled predominantly by elevation and distance from tidal influence, whilst combined datasets reflected intra- and inter-site variability in the assemblages. Elevation was still found to have an important control over the distributions, with a strong relationship between the species zonations and elevation (r2 = 0.8). Therefore, the dataset (82 samples) formed a local training set in which a transfer function for the relationship between foraminifera species and elevation was developed. WAPLS was used as it produced the highest predictive ability (r2 jack = 0.85) and lowest prediction errors (RMSEPjack = 0.11 m). Regional and combined (local plus regional) transfer functions were also developed but the local transfer function produced the most accurate and reliable reconstruction. Reconstructions were carried out for both saltmarshes with reference to a sediment chronology which was established using radionuclides and pollution indicators. The reconstructions demonstrated the vast difference in the saltmarsh development and record of sea level between the sites. Oglet Bay developed as a result of increased accommodation space arising from changing estuary morphology, resulting in rapid accretion (2.34 cm year-1) and was found to be strongly influenced by tidal channel migration. Decoy Marsh accreted at a slower pace (0.32 cm year-1) and was less affected by tidal or morphological changes. Both reconstructions were affected by decalcification resulting in the reconstructions dating back to 1978 at the most. The reconstructed rates of sea-level change were 1.8 cm year-1 for Oglet Bay and 1.1 cm year-1 for Decoy Marsh, both of which over-estimate the trend from the monthly instrumental record (1.04 cm year-1) over the same period. The study highlights the problems which may arise when conducting research in an inner estuary which is strongly macrotidal, including tidal range changes, tidal asymmetry, and decalcification, but also demonstrates that a relatively precise and reliable reconstruction is achievable.