Author: Maine Geological SurveyPublisher:
ISBN:
Category : Coasts
Languages : en
Pages : 17
Book Description
Evidence for Late Holocene and Recent Sea Level Rise Along Coastal Maine Utilizing Salt Marsh Data
Author: Maine Geological SurveyPublisher:
ISBN:
Category : Coasts
Languages : en
Pages : 17
Book Description
Evidence for Late Holocene Sea-level Rise in New England
Author: R. Scott AndersonPublisher:
ISBN:
Category : Sea level
Languages : en
Pages : 22
Book Description
Diversity and Complexity in Prehistoric Maritime Societies
Author: Bruce J. BourquePublisher: Springer Science & Business Media
ISBN: 0585275742
Category : Social Science
Languages : en
Pages : 418
Book Description
New England archaeology has not always been everyone's cup of tea; only late in the Golden of nineteenth-century archaeology, as archaeology's focus turned westward, did a few pioneers look northward as well, causing a brief flurry of investigation and excavation. Between 1892 and 1894, Charles C. Willoughby did some exemplary excavations at three small burial sites in Bucksport, Orland, and Ellsworth, Maine, and made some models of that activity for exhibition at the Chicago World's Fair. These activities were encouraged by E Putnam, director of the Harvard Peabody Museum and head of anthropology at the "Columbian" Exposition. Even earlier, another director of the Peabody, Jeffries Wyman, spawned some real interest in the shellheaps of the Maine coast, but that did not last very long. Twentieth-century New England archaeology, specifically in Maine, was--for its first fifty years--rather low key too, with short-lived but important activity by Arlo and Oric (a Bates Harvard student) prior to World War Later, I. another Massachusetts institution, the Peabody Foundation at Andover, took some minor but responsible steps toward further understanding of the area's prehistoric past.
Neotectonics of Maine
Author: Walter A. AndersonPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 244
Book Description
Salt Marshes
Author: Duncan M. FitzGeraldPublisher: Cambridge University Press
ISBN: 1316946835
Category : Science
Languages : en
Pages : 499
Book Description
Salt marshes are highly dynamic and important ecosystems that dampen impacts of coastal storms and are an integral part of tidal wetland systems, which sequester half of all global marine carbon. They are now being threatened due to sea-level rise, decreased sediment influx, and human encroachment. This book provides a comprehensive review of the latest salt marsh science, investigating their functions and how they are responding to stresses through formation of salt pannes and pools, headward erosion of tidal creeks, marsh-edge erosion, ice-fracturing, and ice-rafted sedimentation. Written by experts in marsh ecology, coastal geomorphology, wetland biology, estuarine hydrodynamics, and coastal sedimentation, it provides a multidisciplinary summary of recent advancements in our knowledge of salt marshes. The future of wetlands and potential deterioration of salt marshes is also considered, providing a go-to reference for graduate students and researchers studying these coastal systems, as well as marsh managers and restoration scientists.
Extension of the Late Holocene Sea-level Record in North Carolina, USA
Author: Jessica KegelPublisher:
ISBN:
Category : Cedar Island (Carteret County, N.C. : Island)
Languages : en
Pages : 83
Book Description
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.
Publications of the Maine Geological Survey
Author: Maine Geological SurveyPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 44
Book Description
Sea-level research: a manual for the collection and evaluation of data
Author: O. van de PlasschePublisher: Springer
ISBN: 940094215X
Category : Science
Languages : en
Pages : 631
Book Description
An editorial by Wanless (1982), entitled "Sea level is rising - so what?", tells the case of an executive editor of a major city newspaper, who, when confronted with evi dence for a recent sea-level rise, replied: "That just means the ocean is six inches deeper, doesn't it?". Whether his "so what?" attitude was real or put on to dike a threat of sensation, there is at present a wide and deepening interest in ongoing and future global sea-level change. This interest has grown along with the concern over global warming due to increasing levels of C02 and trace gases. A stage has been reached where investigators of climat- sea-level relationships call for long-term measurement programmes for ice-volume changes (using satellite altimetry) and changes in temperature and salinity of the oceans (ther mal expansion). This manual, however, is primarily concerned with sea level changes in the past, mainly since the end of the last glaciation. Its major objective is to help answer the ques tion: "how?", which, of course, is little else but to assist in the gathering of fuel for the burning question: "why?" Good fuel, hopefully, for the less smoke and ashes, and the more heat and light produced by that fire, the better scientists are enabled to develop a quantitative under standing of past, and hence of future, sea-level changes on different spatial and temporal scales.
Publications
Author: Maine Geological SurveyPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 72
Book Description
A Late Holocene Reconstruction of Coastal Salt Marsh Net Accretion Rates and Environmental Change from Three Sites in Southern Californa
Author: Lauren Nicole BrownPublisher:
ISBN:
Category :
Languages : en
Pages : 38
Book Description
Coastal marshes are complex ecogeomorphic feedback systems that require further investigation on the Southern California coast to understand potential responses to sea level rise (SLR). Long-term accretion rates - deposition and erosion of mineral and organic matter - form a basis of understanding processes in the marsh related to SLR responses. From sediment cores, I reconstruct the net accretion rates of three marshes using radiocarbon dating methods and analyze loss on ignition (LOI) data to understand the physical properties of the sedimentary record in the three marshes. Average net accretion rates for Tijuana Estuary are 1.0 ± 0.94 mm yr¬-1, for Upper Newport Bay are 1.0 ± 0.4 mm yr-1, and for Morro Bay are 8.0 ± 8.3 mm yr-1. Over the past 2000 cal YBP, all net accretion rates kept pace or exceed rates of SLR (when compared to historic SLR of 0.6 to 2 mm yr-1); however, only Morro Bay exhibits historic net accretion rates high enough to compare to possible rates of SLR associated with projected sea level gains of 0.3 to 1.6 m on the Pacific coast through 2100. Core stratigraphies indicate marsh conditions change frequently and the current Spartina spp. and Salicornia spp. marsh vegetation communities are geologically recent features in their present locations, existing from 700 to 1000 cal YBP. The future under continued human modification of coastal systems, climate change, and accelerated SLR merit continued research into the dynamics of coastal salt marsh systems on the California coast.