Penghu Marine Geopark


     Penghu Marine Geopark is famous for its basaltic landscape and significant marine ecology. Magnificent volcanic landforms are found everywhere, such as hexagonal or pentagonal basaltic rock pillars and lava platforms. Unique cultural landscapes and economic activities nurtured by Penghu’s particular geology, geomorphology, abundant marine ecology and historical geography, are characteristic and charming. These are the entire geological and geographical milieu that gives Penghu Marine Geopark special value and socio-economic meaning.

     Penghu Islands are located in the Taiwan Strait and are made of basic basaltic rocks, as a result of gradually cooled down magma that erupted from the ground. The physical characteristics of basic basaltic magma are less viscous and with high mobility, making them different from other volcanic islands with towering hills or mounds; Penghu Islands are mainly platform-based. In addition, large numbers of columnar jointed basalt cliffs surround the border of Penghu islands in distinctive ways, attracting many visitors. With the combination of special geological features, marine ecology, and human activities nurtured by maritime history, the uniqueness and importance of Penghu Marine Geopark are beyond words.

     Penghu islands have the oldest volcanic geology of Taiwan as a result of the collision between the Indian plate and Eurasian continental plate, and the subduction of the Pacific plate after the late Mesozoic. The effect of the collision was sea-floor spreading and plate divergent. It was mainly due to these divergent activities that large amount of lava flow oozed out into the Penghu archipelago area.The cooling of the basaltic lava flow formed highly regular columnar joints. These now display various slopes and shapes as a result of tectonic activity. Together with weathering and erosion, these basaltic columns exhibit diversity in forms. 

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