scholarly journals Present‐Day Subsidence in the Ganges‐Brahmaputra‐Meghna Delta: Eastern Amplification of the Holocene Sediment Loading Contribution

2019 ◽  
Vol 46 (19) ◽  
pp. 10764-10772 ◽  
Author(s):  
Y. Krien ◽  
M. Karpytchev ◽  
V. Ballu ◽  
M. Becker ◽  
C. Grall ◽  
...  
Keyword(s):  
Sediment Loading ◽  
The Holocene ◽  
Holocene Sediment ◽  
The Ganges

scholarly journals Observations on Palaeogeographical Evolution of Akrotiri Salt Lake, Lemesos, Cyprus

Geosciences ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 321
Author(s):  
Miltiadis Polidorou ◽  
Niki Evelpidou ◽  
Theodora Tsourou ◽  
Hara Drinia ◽  
Ferréol Salomon ◽  
...  
Keyword(s):  
Climate Change ◽  
Landscape Evolution ◽  
Salt Lake ◽  
Active Tectonics ◽  
Scientific Interest ◽  
Progressive Change ◽  
The Holocene ◽  
Holocene Sediment ◽  
First Time ◽  
The City

Akrotiri Salt Lake is located 5 km west of the city of Lemesos in the southernmost part of the island of Cyprus. The evolution of the Akrotiri Salt Lake is of great scientific interest, occurring during the Holocene when eustatic and isostatic movements combined with local active tectonics and climate change developed a unique geomorphological environment. The Salt Lake today is a closed lagoon, which is depicted in Venetian maps as being connected to the sea, provides evidence of the geological setting and landscape evolution of the area. In this study, for the first time, we investigated the development of the Akrotiri Salt Lake through a series of three cores which penetrated the Holocene sediment sequence. Sedimentological and micropaleontological analyses, as well as geochronological studies were performed on the deposited sediments, identifying the complexity of the evolution of the Salt Lake and the progressive change of the area from a maritime space to an open bay and finally to a closed salt lake.

scholarly journals Holocene Sediment Production in Lillooet River Basin, British Colombia: A Sediment Budget Approach

2007 ◽  
Vol 45 (1) ◽  
pp. 45-57 ◽  
Author(s):  
Peter Jordan ◽  
Olav Slaymaker
Keyword(s):  
Sediment Yield ◽  
Debris Flows ◽  
Sediment Budget ◽  
Sediment Supply ◽  
Volcanic Complex ◽  
Minor Importance ◽  
The Holocene ◽  
Sediment Production ◽  
Clastic Sediment ◽  
Holocene Sediment

ABSTRACTA sediment budget approach is used to investigate the sources, storage, and yield of clastic sediment in Lillooet River watershed, in the southern Coast Mountains. The 3150 km2basin is heavily glacierised, and includes a Quaternary volcanic complex which has been active in the Holocene. The sediment yield has been determined from the rate of advance of the delta at the basin outlet. The floodplain of the main river valley is aggrading as the delta advances, and probably has been through most of the Holocene. Major sediment sources in the basin include glaciers and Neoglacial deposits, debris flows, and landslides in the Quaternary volcanic complex. Soil and bedrock creep, bank erosion of Pleistocene glacial deposits, and sediment from logging and agriculture are probably of minor importance. Estimates of sediment production from these sources explain only about half the observed clastic sediment yield plus the rate of valley aggradation. The unexplained sediment production may be associated with paraglacial sediments exposed by glacial retreat from the nineteenth century Neoglacial maximum; alternatively the frequency of occurrence of intermediate scale debris flows and landslides has been seriously underestimated. Sediment supply is highly episodic over time scales of centuries to thousands of years. Major factors in the temporal pattern of Holocene sediment supply are periods of volcanism, large landslides, the retreat of glaciers from the Neoglacial maximum, and recent river engineering works.

Contributions of a Strengthened Early Holocene Monsoon and Sediment Loading to Present‐Day Subsidence of the Ganges‐Brahmaputra Delta

2018 ◽  
Vol 45 (3) ◽  
pp. 1433-1442 ◽  
Author(s):  
M. Karpytchev ◽  
V. Ballu ◽  
Y. Krien ◽  
M. Becker ◽  
S. Goodbred ◽  
...  
Keyword(s):  
Early Holocene ◽  
Sediment Loading ◽  
The Ganges

scholarly journals Evaluating the quality of clay on the VL1 core Vinh Long and apply for making brick

2013 ◽  
Vol 16 (2) ◽  
pp. 64-72
Author(s):  
Tuan Huu Le ◽  
Hoang Minh Truong ◽  
Uyen Thi Phuong Ngo
Keyword(s):  
Agricultural Development ◽  
Geotechnical Properties ◽  
River Delta ◽  
Mekong River ◽  
The Holocene ◽  
Mekong River Delta ◽  
Holocene Sediment

The Holocene sediment commonly covers the Mekong River Delta. The most is the fine materials including silt, clay; they are very plentiful. There are a lot of researches about Holocene sediment that study about sediment, formal origin, and pedology, applying for minerals survey and the agricultural development. Aim of this topic to know the characteristics of minerals in the clay and basic geotechnical properties for using the materials to make brick in the Vinhlong province.

scholarly journals Thickness of marine Holocene sediment in the Gulf of Trieste (Northern Adriatic Sea)

2017 ◽  
Author(s):  
Ana Trobec ◽  
Martina Busetti ◽  
Fabrizio Zgur ◽  
Luca Baradello ◽  
Alberto Babich ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Sedimentary Cover ◽  
Data Repository ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
The Holocene ◽  
Gulf Of Trieste ◽  
Sedimentary Sequences ◽  
Holocene Sediment ◽  
Topographic Depressions

Abstract. We use various geophysical datasets (multibeam and singlebeam echosounder data, sub-bottom profiling Chirp and sonar data and very high resolution boomer seismic data) along with published sedimentological data and depth data from nautical charts in order to create models of the depth of the seafloor and the base of Holocene marine sediment in the Gulf of Trieste. The two models are later used in order to calculate the thickness of marine Holocene sediment which has been depositing on the Late Pleistocene alluvial plain since the Holocene transgression in the Italian and Slovenian part of the gulf. Thicker Holocene marine sedimentary sequences averaging at around 5 meters are characteristic for the SE part of the gulf. In other parts of the gulf the Holocene marine sedimentary cover is very thin or even absent, except in close proximity of the shoreline and fluvial sediment sources, in the area of the Trezza Grande paleodelta and above topographic depressions of the Late Pleistocene base. The presented datasets available from the OGS SNAP data repository (https://doi.org/10.6092/6ad9b1e6-c977-cec9-8a2d-db10c7f90adc) represent a valuable reference for a wide variety of research disciplines dealing with the dynamic Earth system in the Gulf of Trieste and could use as a valuable tool for designing sampling and geophysical campaigns in the studied area.

scholarly journals Thickness of marine Holocene sediment in the Gulf of Trieste (northern Adriatic Sea)

2018 ◽  
Vol 10 (2) ◽  
pp. 1077-1092 ◽  
Author(s):  
Ana Trobec ◽  
Martina Busetti ◽  
Fabrizio Zgur ◽  
Luca Baradello ◽  
Alberto Babich ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Sedimentary Cover ◽  
Data Repository ◽  
Northern Adriatic Sea ◽  
Southeastern Part ◽  
Northern Adriatic ◽  
The Holocene ◽  
Gulf Of Trieste ◽  
Sedimentary Sequences ◽  
Holocene Sediment

Abstract. We use various geophysical datasets (multibeam and singlebeam echosounder data, sub-bottom profiling Chirp and sonar data and very high-resolution boomer seismic data) along with published sedimentological data and depth data from nautical charts in order to create models of the depth of the seafloor and the base of Holocene marine sediment in the Gulf of Trieste. The two models are later used in order to calculate the thickness of marine Holocene sediment which has been depositing on the Late Pleistocene alluvial plain since the Holocene transgression in the Italian and Slovenian parts of the gulf. Thicker Holocene marine sedimentary sequences averaging at around 5 m are characteristic for the southeastern part of the gulf. In other parts of the gulf the Holocene marine sedimentary cover is very thin or even absent, except in close proximity to the shoreline and fluvial sediment sources, in the area of the Trezza Grande paleodelta and above topographic depressions of the Late Pleistocene base. The presented datasets available from the OGS SNAP data repository (http://doi.org/cpz2) represent a valuable reference for a wide variety of research disciplines dealing with the dynamic Earth system in the Gulf of Trieste and could be used as a valuable tool for designing sampling and geophysical campaigns in the studied area.

scholarly journals Conservation Paleobiology as a Tool to Define Reference Conditions in Naturally Stressed Transitional Settings: Micropaleontological Insights from the Holocene of the Po Coastal Plain (Italy)

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3420
Author(s):  
Giulia Barbieri ◽  
Veronica Rossi ◽  
Anupam Ghosh ◽  
Stefano Claudio Vaiani
Keyword(s):  
Coastal Plain ◽  
Diversity Index ◽  
Reference Conditions ◽  
Biological Indicators ◽  
Physical Parameters ◽  
Ecological Groups ◽  
The Holocene ◽  
Holocene Sediment ◽  
Conservation Paleobiology ◽  
Definition Of

The key role of paralic environments as providers of ecosystem services, associated with their increasingly threatened state, led to the definition of international water management policies aimed to improve ecological quality status (EcoQs). Restoration actions rely on the definition of reference conditions, which is a particularly challenging task in naturally stressed transitional environments. In the present work, we apply the diversity index Exp(H’bc) on benthic foraminifer assemblages from two anthropogenically unimpacted transitional to coastal Holocene sediment successions of the Po coastal plain, in order to assess past EcoQs (PaleoEcoQs). Ostracod ecological groups provided detailed insights on naturally stressful paleoenvironmental conditions. We show that “poor” to “moderate” PaleoEcoQs are recorded by biological indicators at reference conditions under fluctuations of chemical-physical parameters and organic matter enrichment. We emphasize the importance of a site-specific paleobiological approach, as significant differences in diversity occur even on a short spatial scale. This study illustrates that early to mid-Holocene sediment successions resulted to be appropriate for conservation paleobiological purposes, providing a high-resolution paleoecological record under the influence of the Holocene sea-level rise in analogy with the present-day global change.

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