scholarly journals Recognition of subaerial exposure surface and relative sea-level change in Pleistocene shallow-marine carbonates in the southern part of Miyako Island, southwestern Japan

2011 ◽  
Vol 70 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Takashi Nanjo ◽  
Ayumi Mizota ◽  
Hiroki Matsuda
Keyword(s):  
Sea Level ◽  
Sea Level Change ◽  
Relative Sea Level ◽  
Shallow Marine ◽  
Level Change ◽  
Subaerial Exposure ◽  
Marine Carbonates

Eifelian–Givetian (Middle Devonian) high-paleolatitude storm- and wave-dominated shallow-marine depositional systems from the Bidouw Subgroup (Bokkeveld Group) of South Africa

2019 ◽  
Vol 89 (11) ◽  
pp. 1140-1170 ◽  
Author(s):  
Cameron R. Penn-Clarke ◽  
Bruce S. Rubidge ◽  
Zubair A. Jinnah
Keyword(s):  
South Africa ◽  
Sea Level ◽  
Middle Devonian ◽  
Large Scale ◽  
Sea Level Change ◽  
Relative Sea Level ◽  
Shallow Marine ◽  
Sequence Stratigraphic ◽  
Level Change ◽  
Depositional Systems

ABSTRACT The sedimentology of the Eifelian–Givetian (Middle Devonian) Bidouw Subgroup in the Clanwilliam Sub-basin of South Africa has been reassessed. Four distinct lithofacies associations are recognized (A–D) and are representative of the deposits of offshore (Os), offshore transition zone to distal lower shoreface (OTZ-dLSF), proximal lower shoreface (pLSF), and upper shoreface–beach (USF-Beach) paleoenvironments. These paleoenvironments are arranged as several T-R-controlled storm- and wave-dominated shallow-marine depositional systems. The presence of storm- and wave-dominated shallow-marine depositional systems in the Bidouw Subgroup, as well as the preceding Emsian–Eifelian (Early–Middle Devonian) Ceres Subgroup provides an alternative explanation to storm- and wave-dominated delta and mixed wave- and-tide-dominated delta models that have previously been proposed for the Bokkeveld Group. Sequence-stratigraphic analysis of the Bidouw Subgroup suggests that although sedimentation occurred during two large-scale second-order transgressive events, the succession was predominantly regressive. Third-order and fourth-order transgressive–regressive (T-R) sequences are more numerous with respect to the preceding Ceres Subgroup, suggesting that the driver for T-R cyclicity and relative sea-level change was more active during the Eifelian–Givetian than in the Emsian–Eifelian of South Africa. These data are important since relative sea-level change and its effects on paleoenvironmental change at high paleolatitudes during the Devonian Period are poorly known.

scholarly journals Corrigendum: Late Devensian and Holocene relative sea-level change in North Wales, UK

2011 ◽  
Vol 26 (7) ◽  
pp. 768-768
Author(s):  
M. J. Roberts ◽  
J. D. Scourse ◽  
J. D. Bennell ◽  
D. G. Huws ◽  
C. F. Jago ◽  
...  
Keyword(s):  
Sea Level ◽  
Sea Level Change ◽  
Relative Sea Level ◽  
Level Change ◽  
North Wales

scholarly journals Relative sea‐level change and postglacial isostatic adjustment along the coast of south Devon, United Kingdom

2008 ◽  
Vol 23 (5) ◽  
pp. 415-433 ◽  
Author(s):  
Anthony C. Massey ◽  
W. Roland Gehrels ◽  
Dan J. Charman ◽  
Glenn A. Milne ◽  
W. Richard Peltier ◽  
...  
Keyword(s):  
United Kingdom ◽  
Sea Level ◽  
Sea Level Change ◽  
Relative Sea Level ◽  
Level Change ◽  
Isostatic Adjustment

Historical rates of salt marsh accretion on the outer Bay of Fundy

2001 ◽  
Vol 38 (7) ◽  
pp. 1081-1092 ◽  
Author(s):  
Gail L Chmura ◽  
Laurie L Helmer ◽  
C Beth Beecher ◽  
Elsie M Sunderland
Keyword(s):  
Salt Marsh ◽  
Sea Level ◽  
Sea Level Change ◽  
Bay Of Fundy ◽  
Relative Sea Level ◽  
Early 19Th Century ◽  
Level Change ◽  
Pollen Stratigraphy ◽  
Accretion Rates ◽  
Marsh Accretion

We examine rates of salt marsh accumulation in three marshes of the outer Bay of Fundy. At each marsh we selected a site in the high marsh with similar vegetation, and thus similar elevation. Accretion rates were estimated by 137Cs, 210Pb, and pollen stratigraphy to estimate rates of change over periods of 30, 100, and ~170 years, respectively. These rates are compared with records from the two closest tide gauges (Saint John, New Brunswick, and Eastport, Maine) to assess the balance of recent marsh accretion and sea-level change. Averaged marsh accretion rates have ranged from 1.3 ± 0.4 to 4.4 ± 1.6 mm·year–1 over the last two centuries. Recent rates are similar to the rate of sea-level change recorded at Eastport, Maine, suggesting that they are in step with recent sea-level change but very sensitive to short-term variation in relative sea level. Based on the pollen stratigraphy in the marsh sediments, the marsh accretion rate was higher during the late 18th to early 19th century. Higher rates probably were due to local increases in relative sea level as a result of neotectonic activity and may have been enhanced by increased sediment deposition through ice rafting.

scholarly journals Postglacial relative sea level change and glacier activity in the early and late Holocene: Wahlenbergfjorden, Nordaustlandet, Svalbard

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Anders Schomacker ◽  
Wesley R. Farnsworth ◽  
Ólafur Ingólfsson ◽  
Lis Allaart ◽  
Lena Håkansson ◽  
...  
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Sea Level Change ◽  
Relative Sea Level ◽  
Level Change
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