Peat Formation Tidal

BIOSTRATINOMIC PROCESSES IN COASTAL MARINE SETTINGS

BIOSTRATINOMIC PROCESSES IN COASTAL MARINE SETTINGS

Mangrove peat formation is dependent on the mangrove type and its position within the tidal zone. Mangroves contribute to autochthonous peat, comprised mainly of intertwined rootlets and soft (parenchymatous) parts of larger roots. Mangroves may contribute debris to allochthonous peat, which may be distinguished by the presence of marine invertebrate shells intermixed with finely divided ...

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Global carbon sequestration in tidal, saline wetland soils

Global carbon sequestration in tidal, saline wetland soils

In mangrove swamps peat formation primarily occurs through deposition and slow turnover of mangrove roots as aboveground tissues rapidly decay or are transported from the system [Middleton and McKee, 2001]. The global importance of wetlands as carbon sinks is widely recognized [Adams et al., 1990; Watson et al., 2000]. Due to their great expanse, the role of peatlands as carbon sinks has ...

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C T O

C T O

highest tidal range in the world, at Avonmout h. The result is a very extensive intertidal zone, 6km wide at Goldcliff during the Lowest Astronomical Tide. The Holocene sediment sequence is 1015m thick (Allen 2001). The stratigraphy, as typified by the Goldcliff sequence (Fig. 312), comprises a basal preinundation palaeosol with trees of a Lower Submerged Forest, a thin peat which ...

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The Origin of Roddons

The Origin of Roddons

The theory of roddon formation ... is the "roddon," a bank of laminated silt meandering through the peat fens. Major Fowler suggested that the raised form of the roddons was due to differential shrinkage or wastage, as between the silt which had been deposited in their beds when they were active waterways, and the deep peat through which they once flowed. The detailed explanation suggested by ...

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A Comparison of Peat Formation Processes over Recent and ...

A Comparison of Peat Formation Processes over Recent and ...

Peat formation processes are strongly linked to watershed processes as well as anthropogenic disturbance including landuse change, urbanization, and hydraulic gold mining during the past 150 years. The SacramentoSan Joaquin Delta, which is found at the landward edge of the San Francisco Estuary, was once a vast temperate peatland with 1400 km2 of tidal marshes and .

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Intertidal peats and the archaeology of coastal change in ...

Intertidal peats and the archaeology of coastal change in ...

Abstract Dates for the beginning and end of intertidal and coastal peat formation are reviewed in the Severn Estuary, Bristol Channel and Pembrokeshire. Peat fo

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Frontiers | Understanding the Coastal Ecocline: Assessing ...

Frontiers | Understanding the Coastal Ecocline: Assessing ...

 · The former soil surface now resembles a lake bottom surface, with the possible formation of a gyttja (a characteristic layer composed of either organic or mineral material that can be typically found beneath fen peats, which is considered as the initiation stage of fen peat formation). The ongoing sealing process at the soil surface limits the vertical infiltration, thus, possibly changing the ...

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4 Vecht region

4 Vecht region

and peat formation continued, tidal and salt water influence in the study area decreased. Three phases of marine calcareous clay deposition are registered in the Noordoostpolder. During the first phase at c. BC clay was deposited in the southern and southcentral area of the Noordoostpolder (Older Unio clay; see fig. ).1 During that phase the environment was comparable with a ...

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Peat Formation Concentrates Arsenic Within Sediment ...

Peat Formation Concentrates Arsenic Within Sediment ...

Peat also facilitates the formation of potentially stable arsenian pyrite in anoxic sediments through microbially mediated processes (Huertadiaz and Morse, 1992; Schoonen, 2004). Thus, the role of peat in regulating arsenic partitioning, reactivity, and mobility in sediments of the .

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Comparison of Chemical Properties of Peats under Different ...

Comparison of Chemical Properties of Peats under Different ...

The formation of the South Sumatra peats can be generally explained in three ways of formation, namely the coastal peats, basin or chment peats (lebak peats) and high region peats. Peats occur near the coastal area with the altitude level of – m above sea level. The coastal peats are usually shallow (thickness of less than < 3 m) and

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The oldest extant tropical peatland in the world: a major ...

The oldest extant tropical peatland in the world: a major ...

 · This tidal influence and salt water intrusion are exacerbated by anthropological peat drainage and sea level rise, ... Around 15–7 ka, we observed a cluster of peat initiation events at Ketapang and Gunung Palung. This peat formation was possibly caused by an increase in precipitation through the early Holocene, when the northern hemisphere warmed and the ITCZ advanced .

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The formation of coastal peat marshes under an upward ...

The formation of coastal peat marshes under an upward ...

 · The upward growth of a tidal mudflatmarsh within the tidal frame is determined theoretically by the rates of minerogenic sediment supply, organogenic sediment supply, longrange sediment compaction and movement of relative sealevel. Where the movement of relative sealevel is upward, a marsh can achieve a state of dynamic equilibrium in which the composition of the sediment accumulating on ...

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Chapter 7: Simulations of Holocene coastal stratigraphy ...

Chapter 7: Simulations of Holocene coastal stratigraphy ...

backbarrier basins, with formation of peat on the landward side and deposition of tideinfluenced sediments on the seaward side (Pons et al., 1963, Zagwijn, 1986). The size of the tidal backbarrier basins varied alongshore (Beets et al., 1992). The greater part of the sediment in the backbarrier basins originated from the Pleistocene substrate offshore and from erosion of offshore ...

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VU Research Portal

VU Research Portal

hand corings: peat formation due to Holocene sealevel rise, fluvial sy stems in the peat landscape, peat digging and polder formation, tidal and lagoonal deposits related to the Holocene transgression, coastal barriers and dunes. Fig. 1 Excursion route . Geological and paleogeographical development . The Netherlands are situated in a delta formed by the Rhine, Maas, Schelde and, before the ...

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Persistence and Change in a Coastal Lowland

Persistence and Change in a Coastal Lowland

situated between former tidal inlets at Romney and Rye which were instrumental in driving Foreland and Marshland environmental change during the last 2000 years. Peat formation commenced c. 4500 cal. yr BP at Sandyland and after 3700 cal. yr BP at Lydd. At Sandyland, eutrophic fen carr communities were replaced by acidic, nutrientpoor Myricadominated vegetation from c. 4100 cal. yr BP, a ...

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