scholarly journals Re-examination of buried peat deposits at the Desaki Coast (Tamano City, Okayama Prefecture) in the central part of the Seto Inland Sea, with special reference to Mid-Holocene relative sea-level variation

2011 ◽  
Vol 50 (1) ◽  
pp. 61-69
Author(s):  
Hiroshi Sato ◽  
Sigeyuki Suzuki ◽  
Mariko Matsushita ◽  
Arata Momohara ◽  
Yayoi Ueda ◽  
...  
Keyword(s):  
Special Reference ◽  
Sea Level ◽  
Seto Inland Sea ◽  
Level Variation ◽  
Relative Sea Level ◽  
Sea Level Variation ◽  
Peat Deposits ◽  
The Seto Inland Sea ◽  
Okayama Prefecture

scholarly journals Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes

2015 ◽  
Vol 45 (suppl 1) ◽  
pp. 79-95 ◽  
Author(s):  
Vinícius Ribau Mendes ◽  
Paulo César Fonseca Giannini ◽  
Carlos Conforti Ferreira Guedes ◽  
Regina DeWitt ◽  
Helena Asmar de Abreu Andrade
Keyword(s):  
Sea Level ◽  
Age Distribution ◽  
Coastal Dunes ◽  
Level Variation ◽  
Santa Catarina ◽  
Relative Sea Level ◽  
The Past ◽  
Sea Level Variation ◽  
Climatic Control

ABSTRACTDuring the past decades, there have been contrarian explanations for the formation and stabilization of coastal dunefields: while many authors believe the dunes formation would be enhanced by falling sea level, others argue that a rising or stable sea level context would be favorable. For Brazilian coastal dunefields, the second hypothesis seems to be more consistent with the luminescence ages found so far; however, most of these data were obtained without using the SAR protocol. Another point of concern is the role of climate change in the aeolian system, which is still not very clear. The aim of this paper is to try to clarify these two questions. To this end, five coastal dunefields were selected in central Santa Catarina coast. The remote sensing and dating results allowed the discrimination and mapping of at least four aeolian generations. Their age distribution in relation to the global curve of relative sea level variation during the Late Pleistocene allows us to suggest that the formation of Aeolian dunefields in the coastal context is supported by stable relative sea level. However, relative sea level is not the only determinant for the formation and preservation of the aeolian coastal dunes. Evidences of climatic control indicate that the initiation of dunefields would be favored by periods of less humidity while their stabilization would occur preferably during the periods of rain intensification, connected to monsoon activity.

High-frequency relative sea level variation cycles recorded in sedimentary discontinuities

2005 ◽  
Vol 176 (1) ◽  
pp. 57-68 ◽  
Author(s):  
Youri Hamon ◽  
Gilles Merzeraud ◽  
Pierre-Jean Combes
Keyword(s):  
Sea Level ◽  
High Frequency ◽  
Level Variation ◽  
Relative Sea Level ◽  
Mud Mounds ◽  
Synsedimentary Tectonics ◽  
Sea Level Variation ◽  
Southwestern Margin ◽  
Regressive Phase ◽  
Flooding Period

Abstract In the Lodève region (“Caussenard High” southwestern margin of the South-East Basin), upper Hettangian to Lotharingian carbonate series shows more than twenty sedimentary discontinuities of various types. Some of these discontinuities are polyphase surfaces, which record high-frequency sea-level variation cycles. One of these discontinuities has been studied in detail, in order to understand its origin (processes, chronology of formation). Several stages of formation have been recognized. A transgressive erosion occurred first. Next, development of Skolithos and Diplocraterion burrows, associated with iron mineralizations, could be indicative of a condensation phase corresponding to the subsequent maximum-flooding period. The burrows sparitic fills may characterize the highstand period following the maximum-flooding period. Next, alteration and corrosion observed on the surface and in the burrows may indicate an emersion related to a regressive phase and the subsequent lowstand period. Finally, micro mud-mounds (formed by pelecypods and corals trapping fine lime sediment) may indicate a new condensation phase, associated with the transgression and the following maximum-flooding period. Thus, this discontinuity records one and a half relative sea level variation cycle. Counting sequences observed in the deposits and in the discontinuities leads to an estimate of 100,000 years duration for these cycles. That could correspond to the eccentricity variation cycles. Moreover, the local synsedimentary tectonics may have influenced the formation of this type of discontinuity, by forming shallow restricted environments favourable to their development. Recognition and understanding of these particular discontinuities are essential because they may be laterally correlated with other surfaces in continental settings (paleokarst) or with classical sequences in marine environments.

scholarly journals Dynamic Sea Level Variation from GNSS: 2020 Shumagin Earthquake Tsunami Resonance and Hurricane Laura

2020 ◽  
Author(s):  
Kristine M. Larson ◽  
Thorne Lay ◽  
Yoshiki Yamazaki ◽  
Kwok Fai Cheung ◽  
Lingling Ye ◽  
...  
Keyword(s):  
Sea Level ◽  
Level Variation ◽  
Sea Level Variation ◽  
Dynamic Sea Level

scholarly journals ESTIMATION OF LONG-TERM SEA LEVEL VARIATION TAKING INTO CONSIDERATION GROUND DEFORMATION BY GNSS SURVEY

2018 ◽  
Vol 74 (2) ◽  
pp. I_145-I_150
Author(s):  
Ryoji NAITO ◽  
Kazunori SAMESHIMA ◽  
Yasunori KONDOU ◽  
Naokazu ITO ◽  
Koji KAWAGUCHI
Keyword(s):  
Sea Level ◽  
Ground Deformation ◽  
Level Variation ◽  
Sea Level Variation
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