Beachrock as sea-level indicator – A case study at the coastline of Oman (Indian Ocean)
Beachrock as sea-level indicator – A case study at the coastline of Oman (Indian Ocean)
复制标题
海滩岩石作为海平面指示器 â 阿曼(印度洋)海岸线的案例研究
DOI:
10.1016/j.quascirev.2019.01.003
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发表时间:
2019
影响因子:
4
通讯作者:
Hoffmann
中科院分区:
文献类型:
--
作者:
Falkenroth;Schneider;Hoffmann
Future sea level changes are a threat to coastal communities worldwide. Therefore, reliable methods for the reconstruction of past relative sea-level variations are essential to make predictions of future developments. Beachrocks are a widely distributed indicator of Quaternary paleo-coastlines, with a high potential for preservation. Nevertheless, their use as sea-level indicator faces challenges in the determination of the exact elevation of beachrock formation with respect to paleo sea level. This information is crucial to the establishment of a sea-level index point.Our study area on the northeastern coastline of Oman shows a set of twelve marine terraces that reach a height of 500 m above mean sea level. While the upper terraces are erosional, the lowest three are depositional. On the erosional terraces beachrocks are the only sediment-cover that withstood erosion. On the depositional terraces however, beachrocks occur alongside other sediments, which can be fluvial, alluvial, or marine in origin. The coastal development of the area is of high interest as uplift and tectonic activity are ongoing.Fieldwork and petrographic methods on eight outcrops on three terrace levels led to the identification of eight lithofacies in six facies associations. We used facies analysis to improve the information on paleo sea level as derived by the sole use of geomorphological indicators. Here, we demonstrate that facies analysis (so far applied exclusively on sandy deposits) is applicable also to gravel-dominated systems. The results contribute to knowledge on local changes in the depositional environment and help to reconstruct uplift rates.
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DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
G. Hoffmann;M. Meschede;A. Zacke;Mohammed Hilal Al Kindi
通讯作者:
Mohammed Hilal Al Kindi
DOI:
10.1127/1860-1804/2013/0002
发表时间:
2013
影响因子:
1.1
作者:
Hoffmann;Rupprechter;Mayerhofer
通讯作者:
Mayerhofer
DOI:
--
发表时间:
1999
期刊:
Geological Society Special Publication
影响因子:
--
作者:
F. Bezerra;F. P. Lima;R. Amaral;Luciano Henrique de Oliveira Caldas;Leão X. Costa
通讯作者:
Leão X. Costa
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
A. Baucon;F. Felletti
通讯作者:
F. Felletti
DOI:
--
发表时间:
1969
期刊:
影响因子:
--
作者:
H. Edward Clifton
通讯作者:
H. Edward Clifton