Spots:桶盤考察後 地質公園研討劃下句點20061113
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桶盤考察後 地質公園研討劃下句點
澎湖地質公園研討會昨日進行最後一天行程,由承辦單位中國地理學會帶領五十位學員前往離島桶盤實地考察,並說明桶盤特色與澎湖推動地質公園潛力,希望能引起地方上更多共鳴。
昨日進行的研討會最後一天行程,主要考察離島桶盤嶼,桶盤嶼位於馬公港西南方,距馬公市約七公里,因外型酷似桶盤而得名。東、南、西三面海岸均圍繞著巨大玄武岩柱,奇岩怪石星羅棋布,素有「澎湖黃石公園」之雅號。
島形仿如一個覆蓋在海上的桶盤,為標準的方山小島。島的四周都有垂直的柱狀玄武岩圍繞,極為壯觀。西南方的海蝕平台上有一處似火山口的環狀構造,中央穹起的岩塊,有如一個蓮花台,隨潮水的漲退循環顯沒,是澎湖極特殊的地形景觀。
雖然參加野外考察行程的學員多數為澎湖人,對於桶盤嶼景觀十分熟悉,但透過解說還是不禁讓人讚嘆澎湖地質地形的特色與壯闊。
積極推動澎湖設置地質公園的澎縣農漁局說,澎湖群島的玄武岩,據地質學者研究,係玄武岩熔岩多次經過地底裂隙湧出地表冷卻而成的,目前已知最古老的玄武岩在望安島的天台山,熔岩約在一千八百萬年前開始流出,熔岩流出後,岩體會因冷卻而龜裂成五、六角形的柱狀節理。
由於澎湖群島的玄武岩溶岩是歷經數次不連續的噴發形成的,其柱狀節理的形態種類變化甚多,岩石的色澤、質感及熔岩規模更是全國僅有,也是全世界少見的地質地形景觀,政府於民國八十四年將全縣列為國家級的風景特定區,其中最珍貴的三個島嶼|小白沙嶼、雞善嶼、錠鉤嶼於民國八十一年公告為玄武岩自然保留區,澎湖玄武岩地質地貌更在二00二年被中央文建會提報登錄「世界遺產」的潛力點之一。
透過這一次研討會舉行,農漁局希望讓更多人瞭解澎湖地質地貌的特殊性與稀有,凝聚共識,成為推動地質公園的最大力量。
資料來源:澎湖時報[2006/11/13]