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J4 ›› 2011, Vol. 17 ›› Issue (4): 620-627.

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The Formation Mechanism and Coastal Evolution of Tangdao Bay, Qingdao, Eastern China

LUO Qin-min, QIN Yong-peng, JIA Zhen-zhen   

  1. 1. School of Geosciences, China University of Petroleum, Qingdao 266555, China;
    2. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China
  • Received:2011-03-14 Revised:2011-07-18 Online:2011-12-20 Published:2011-12-20

Abstract:

Integrated with field observations and analysis of fault structures this study investigated the formation mechanism and
coastal evolution of Tangdao Bay in Qingdao, eastern China. The result indicates that three elements are essential for the formation of Tangdao Bay (1) NNE-NE trending faults coutrolled the structural framework and extendsional direction; (2) Quaternary glacial erosion casted a profile that is charaterized by lowlands in the middle and high terrains on both sides; (3) Around 10 ka BP, as a large-scale transgression occurred, sea water flooded the lowlands and Tangdao Bay was formed. After the transgression, Tangdao Bay has experienced three geological evolution stages since Holocene, while sea level changes, waves and tides are dominating factors for coastal changes, respectively. With the connection of a tombolo between Liujiadao and Shilingzi in Song Dynasty, Tangdao Bay evolved into a semi-enclosed bay. By the Qing Dynasty, the coastal landforms became similar to what they are today

Key words: bay;coastal evolution;formation mechanism;Tangdao Bay;Shandong Peninsula

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