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Book Brackish Estuarine Marsh Sediments in the Raritan River Estuary and Their Relationship to Sea Level During the Late Holocene

Download or read book Brackish Estuarine Marsh Sediments in the Raritan River Estuary and Their Relationship to Sea Level During the Late Holocene written by Oliver K. Kenen and published by . This book was released on 1999 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Extension of the Late Holocene Sea level Record in North Carolina USA

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.

Book Application of Intertidal Salt marsh Foraminifera to Reconstruct Late Holocene Sea level Change at Kariega Estuary South Africa

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:

Book Agglutinated Foraminifera as Indicators of Salt Marsh Development in Relation to Late Holocene Sea Level Rise Great Marshes at Barnstable Massachusetts

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:

Book Bibliography and index of micropaleontology

Download or read book Bibliography and index of micropaleontology written by and published by . This book was released on 1995 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Distributions and Population Dynamics of Marsh Estuarine Foraminifera with Applications to Relocating Holocene Sea Level

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:

Book Taphonomy of Foraminifera and Bioturbation in Marshes

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:

Book Late Holocene Sea level Reconstructions on the Atlantic Coast of Florida USA

Download or read book Late Holocene Sea level Reconstructions on the Atlantic Coast of Florida USA written by Simin Liu and published by . This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Holocene Geologic History of the Maurice River Cove and Its Marshes Eastern Delaware Bay New Jersey

Download or read book The Holocene Geologic History of the Maurice River Cove and Its Marshes Eastern Delaware Bay New Jersey written by Carol Myrna Chase and published by . This book was released on 1979 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Using The Past As The Key To The Present

Download or read book Using The Past As The Key To The Present written by Benjamin David DeJong and published by . This book was released on 2015 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rising sea levels present an ongoing threat to communities and resources around the Chesapeake Bay, east coast, USA, where tide gauges indicate that the relative rise of sea level is approximately twice the rate of average, eustatic sea-level rise. This has significantly compromised the health and viability of salt marsh habitat on the Eastern Shore during the 20th century, and the biologists who are charged with managing coastal resources in the coming decades need to understand the nature and causes of high rates of regional sea-level rise to develop suitable adaptation plans. Dated geologic deposits and geophysical models suggest that sea-level rise is relatively high on mid-Atlantic coastlines because the land surface is subsiding due to a collapsing glacial forebulge following the Last Glacial Maximum (LGM). To fully understand this process, past sea-level indicators such as dated shoreline deposits are needed to reconstruct regional sea-level behavior in the past, but rigorous age control on geologic deposits is largely restricted to the Holocene and to marine isotope stage (MIS) 5, so the rates and timescales over which these processes operate remain unknown. This research provides long-term paleoenvironmental records from ancient environments under east-central Chesapeake Bay to place the current sea-level threats into the context of a long geologic history of sea-level fluctuations. First, the Pleistocene geologic framework of the region is reconstructed through borehole drilling. Sediments from boreholes provided material for interpreting depositional environments, and for establishing age control for deposits, so that the entire stratigraphy was constrained both in space and time. The geologic framework and ages indicate that Chesapeake Bay alternated between a deeply incised fluvial system and a filled estuary repeatedly in response to major climate fluctuations since at least the early Pleistocene, ~2 Ma. The ages and sedimentology indicate that the field area was submerged intermittently in a shallow estuary until nearly the end of marine isotope stage 3. Because global sea-level proxies suggest that sea level was ~40-80 meters lower than present at that time, these ages suggest that the penultimate glacial forebulge must have remained significantly lowered for nearly 100 ky following the retreat of ice. The implication of this time lag is that mid-Atlantic coastlines are still in a relatively early state of forebulge collapse, and subsidence following retreat of ice from the Last Glacial Maximum will likely continue for the foreseeable future. Ongoing subsidence will continue to exacerbate projected eustatic sea-level rise due to changing global climate, and coastal adaptation plans must remain focused on encouraging the migration of vital habitat toward higher elevations in the landscape.

Book A Reconstruction of Holocene Sea Level Change Between 6 180 to 3 640 Cal Years BP for the Gordano Valley Using Foraminifera

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: