Late Holocene salt marsh development under a regime of rapid relative-sea-level rise: Chezzetcook Inlet, Nova Scotia. Implications for the interpretation of palaeomarsh sequences

1993 ◽  
Vol 30 (7) ◽  
pp. 1374-1384 ◽  
Author(s):  
S. C. Jennings ◽  
R. W. G. Carter ◽  
J. D. Orford
Keyword(s):  
Nova Scotia ◽  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
Late Holocene ◽  
Environmental Gradients ◽  
Relative Sea Level ◽  
Spatial Changes ◽  
Relative Sea Level Rise ◽  
Outer Estuary

Pollen data illustrating a 2000-year record of salt marsh development have been obtained from a variety of outer-estuarine settings in close proximity to the present gravel-dominated coastal barriers at Chezzetcook Inlet, Nova Scotia. The relationship between the biostratigraphic and lithostratigraphic data and relative-sea-level movement is complex. In the outer estuary, temporal and spatial changes to the floral and sedimentological composition of the salt marsh reflect principally processes of estuarine and back-barrier sedimentation that resulted in steep environmental gradients and the development of regressive marsh–sediment complexes, despite a relative-sea-level rise of up to 3.8 mm/a during the late Holocene. Our results contrast with those from the inner estuary at Chezzetcook Inlet, where salt marsh has developed only over the last 200 years as a result of sediment inwash due to European land use, and followed a prolonged episode (approx. 5000 years) of tidal flat conditions. This contrast highlights differences in sediment input and distribution between the outer and inner estuary.

scholarly journals Rapid inundation of southern Florida coastline despite low relative sea-level rise rates during the late-Holocene

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Miriam C. Jones ◽  
G. Lynn Wingard ◽  
Bethany Stackhouse ◽  
Katherine Keller ◽  
Debra Willard ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Late Holocene ◽  
Relative Sea Level ◽  
Relative Sea Level Rise ◽  
Southern Florida

Trends in Chesapeake Bay Sedimentation Rates during the Late Holocene

1990 ◽  
Vol 34 (1) ◽  
pp. 33-46 ◽  
Author(s):  
Joseph F. Donoghue
Keyword(s):  
Sea Level Rise ◽  
Chesapeake Bay ◽  
Sea Level ◽  
Late Holocene ◽  
Tide Gauge ◽  
Past Century ◽  
Sedimentation Rates ◽  
Relative Sea Level ◽  
The Past ◽  
Relative Sea Level Rise

AbstractTrends are discernible in the estimates of late Holocene rates of sedimentation and sea-level rise for the Chesapeake Bay. During most of the Holocene Epoch sedimentation rates and relative sea-level rise were equal, within the limits of measurement, at approximately 1 mm yr−1. Sedimentation rates measured over the past century, however, are nearly an order of magnitude higher, while the rate of relative sea-level rise for the Chesapeake Bay now averages 3.3 mm yr−1, as measured on long-term tide gauge records. When the acceleration in these rates occurred is uncertain, but it appears to have been confined to the past millennium, and probably to the past few centuries. The rapid sedimentation rates recorded during historic time may be a temporary disequilibrium that has resulted from a recent acceleration in the rate of relative sea-level rise.

Middle to late Holocene relative sea level rise, climate variability and environmental change along the Colombian Caribbean coast

The Holocene ◽  
2014 ◽  
Vol 24 (8) ◽  
pp. 898-907 ◽  
Author(s):  
Maria I Velez ◽  
Jaime Escobar ◽  
Mark Brenner ◽  
Orlando Rangel ◽  
Alejandra Betancourt ◽  
...  
Keyword(s):  
Climate Variability ◽  
Environmental Change ◽  
Sea Level Rise ◽  
Sea Level ◽  
Late Holocene ◽  
Relative Sea Level ◽  
Caribbean Coast ◽  
Relative Sea Level Rise

Evidence of relative sea level rise along the coasts of central Apulia (Italy) during the late Holocene via maritime archaeological indicators

2017 ◽  
Vol 439 ◽  
pp. 65-78 ◽  
Author(s):  
G. Mastronuzzi ◽  
F. Antonioli ◽  
M. Anzidei ◽  
R. Auriemma ◽  
C. Alfonso ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Late Holocene ◽  
Relative Sea Level ◽  
Relative Sea Level Rise

The Goldenville–Halifax transition, Mahone Bay, Nova Scotia: relative sea-level rise in the Meguma source terrane

1992 ◽  
Vol 29 (5) ◽  
pp. 1091-1105 ◽  
Author(s):  
John W. F. Waldron
Keyword(s):  
Nova Scotia ◽  
Sea Level Rise ◽  
Sea Level ◽  
Source Area ◽  
Submarine Fan ◽  
Relative Sea Level ◽  
Sea Floor ◽  
Sand Supply ◽  
Relative Sea Level Rise ◽  
Organic Productivity

In the Meguma Group of Nova Scotia, the transition from sand-rich turbidites of the Goldenville Formation to overlying mud-rich turbidites of the Halifax Formation shows unusually rapid vertical facies variations. The Tancook member of the Goldenville Formation is divided into four laterally continuous units. Unit 1 consists of generally thinly bedded classical turbidites interpreted as lobe facies. Unit 2 comprises mottled (bioturbated) and laminated muds. Units 3 and 4 contain packets of thick amalgamated sandstone beds, alternating with more thinly bedded muddy sections. A unique bioclastic bed occurs near the top of unit 3. In unit 4, burrowed sandstone packets traced along strike (across paleocurrent) are not significantly incised into underlying muds. Laminated slates and siltstones of the overlying Mosher's Island member (Halifax Formation) are enriched in manganese and trace metals and contain diagenetic concretions of manganoan carbonate rimmed by metamorphic garnet. The overlying Cunard member comprises dark grey to black, strongly cleaved, carbon-rich slates, interbedded with thin, pyrite-rich, graded siltstones.Changes in the transition zone can be explained by a relative sea-level rise in the Gondwanaland source area of the Meguma Group. During deposition of the Tancook member, turbidite sand supply was progressively and intermittently interrupted as sand became trapped on the shelf. In unit 1, deposition occurred in a submarine-fan system; in higher units, deposition of sandstone packets was probably controlled by transgressions and regressions in the source area. Expanded shelves, briefly colonized by a shelly fauna, led to high organic productivity and eventual anoxia. During deposition of the Mosher's Island member, manganese was concentrated in reducing waters, delivered to the sea floor close to the oxic–anoxic boundary, and trapped as carbonate during early diagenesis. Expansion of fully anoxic conditions led to deposition of black, sulphide-rich shales of the Cunard member.

Late Holocene relative sea level rise and the Neoglacial history of the Greenland ice sheet

2009 ◽  
Vol 24 (4) ◽  
pp. 345-359 ◽  
Author(s):  
Antony J. Long ◽  
Sarah A. Woodroffe ◽  
Sue Dawson ◽  
David H. Roberts ◽  
Charlotte L. Bryant
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Late Holocene ◽  
Ice Sheet ◽  
Greenland Ice Sheet ◽  
Relative Sea Level ◽  
Relative Sea Level Rise ◽  
History Of

scholarly journals Salt marsh ecosystem restructuring enhances elevation resilience and carbon storage during accelerating relative sea-level rise

2019 ◽  
Vol 217 ◽  
pp. 56-68 ◽  
Author(s):  
Meagan Eagle Gonneea ◽  
Christopher V. Maio ◽  
Kevin D. Kroeger ◽  
Andrea D. Hawkes ◽  
Jordan Mora ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
Carbon Storage ◽  
Relative Sea Level ◽  
Relative Sea Level Rise

scholarly journals Late Holocene differential subsidence and relative sea level rise in the Tabasco Delta, Mexico

2020 ◽  
Vol 382 ◽  
pp. 149-153
Author(s):  
Kees Nooren ◽  
Kim M. Cohen ◽  
Jaap H. Nienhuis ◽  
Wim Z. Hoek
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Late Holocene ◽  
Gulf Coast ◽  
Time Windows ◽  
River Mouth ◽  
Beach Ridge ◽  
Relative Sea Level ◽  
Southern Mexico ◽  
Relative Sea Level Rise

Abstract. Coastal subsidence owing to compaction of Holocene strata and deeper-rooted components affects large delta plains such as the Tabasco delta in southern Mexico (Gulf coast). For this system, GNSS3-PPP ground-truthed LiDAR imagery of high-resolution dated beach-ridge series reveals considerable differential subsidence on either side of the present Usumacinta-Grijalva River mouth. Collected field-data allows for quantification of differential subsidence over several time windows and reconstruction of relative sea-level rise back to 5000 years ago. Observed differential subsidence of 1–1.5 m is regarded to be syn-sedimentary delta-subsurface compaction of buried strata in response to the accumulating overburden of the prograding beach-ridge complex.

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