|
|
Huayanpeng boulder beach of Putuo Island, southeast coast of China: characteristics and explanation |
Bin CHEN1(), Zhongyuan CHEN2 |
1. Department of Geography, East China Normal University, Shanghai 200062, China; 2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China |
|
|
Abstract Huayanpeng boulder beach is located at the Cape of Putuo Island, southeast coast of China. From 6000 years ago, sea level changed little and turned steady, which was prone to forming the boulder beach. Since then, numerous storm surges propagated from the West Pacific Ocean have imposed on the bedrock of the eastern coast of Putuo Island, resulting in a large amount of rocks fallen from the hill-slope onto the beach. The similarity of rock lithology between the bedrock and the boulders of the study area supports the hypothesis of Holocene steady sea-level controls on the formation of the beach. Long-term littoral currents, including storm weather and normal weather conditions, have greatly sorted the boulder beach vertically and transversely. From east to west, the beach turns wider and gradient becomes gentler, and the boulders reduce its size, from, on average, 1.0 m to 0.5 m, with a decrease in flattening and an increase in sphericity and psephicity. The sizes of the boulders and flattening turn bigger from supra-littoral to inter-littoral zone, while sphericity and psephicity turn smaller and lower. These basal characteristics of boulders highlight the linkage of beach formation to the high-storm energy propagated from the open seas during the typhoon season.
|
Keywords
boulder beach
sea-level change
storm surge
Putuo Island
|
Corresponding Author(s):
CHEN Bin,Email:bchen1983@yahoo.cn
|
Issue Date: 05 September 2009
|
|
1 |
Chen H D, Yan Q S, Xiang L S (1982). Recent coastal sediments of Zhujiajian Island, Zhoushan Archipelago. Journal of East China Normal University Natural Science Edition , 2: 77-91
|
2 |
Chen J Y, Wang B C, Yu Z Y (1989). Developments and Evolution of China’s Coast. Shanghai: Shanghai Scientific & Technical Publishers, 566
|
3 |
Chen Z Y, Stanley D J (1998). Rising sea level on Eastern China’s Yangtze Delta. Journal of Coastal Research , 14(1): 360-366
|
4 |
Hall A M, Hansom J D, Williams D M, Jarvis J (2006). Distribution, geomorphology and lithofacies of cliff-top storm deposits: Examples from the high-energy coasts of Scotland and Ireland. Marine Geology , 232: 131-155 doi: 10.1016/j.margeo.2006.06.008
|
5 |
Oakey R J, Green M, Carling P A, Lee M W, Sear D A, Grain J W (2005). Shape analysis—a new method for determining representative particle shapes for populations of natural grains. Journal of Sedimentary Research , 75: 1065-1073 doi: 10.2110/jsr.2005.079
|
6 |
Paul J H (1997). Boulder deposits from large waves during the Last Interglaciation on North Eleuthera Island, Bahamas. Quaternary Research , 48: 326-338 doi: 10.1006/qres.1997.1926
|
7 |
Sneed E D, Folk R L (1958). Pebbles in the Lower Colonado River, Texas, a study in particle morphogenesis. Journal of Geology , 66: 114-150
|
8 |
Song Y M (2001). Hydrographic feature of Zhoushan Archipelago. Hydrology , 21 (6): 59–62
|
9 |
Wang Y Z (1995). On geologic tectonic background in Zhoushan Aarchipelago area, South China. Journal of Seismology , 15(1): 55-61
|
10 |
Wentworth C K (1922). A scale of grade and class terms for clastic sediments, Journal of Geology , 30: 377-392
|
11 |
Zhang G D, Wang Y Y, Zhu J C, Yan J P (1987). Modern coastal storm deposits of Putuo Island and Zhujiajian Island, Zhoushan. Acta Sedimentologica Sinica , 5(2): 17–28
|
12 |
Zhang X L, Qiu J S, Wang D Z, Wang R C, Xu X S, Chen X M (2005). Geochemistry and magmatic mixing of the Putuoshan biotite moyites and their enclaves, Zhejiang Province. Acta Petologica Et Mineralogica , 24(2): 81–91
|
13 |
Zhao X T, Di X S, Zhang J S (1979). Sea level change in the eastern of China from 20000 a BP. Acta Oceanologica Sinica , 1(2): 269–281
|
14 |
Zingg T (1935). Beitra¨ge zur Schotteranalyse: Schweizerische Mineralogische und Petrologische Mitteilungen, 15: 39-140
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|