澎湖火山噴發的產物，當玄武岩隨著地殼隆起，或因海水下降的變化而露出地表之後，就開始不斷的接受風吹雨打、日晒蟲蛀之苦。而最嚴重的是海蝕作用，海蝕是指海水運動對玄武岩的破壞作用。海蝕的力量來自波浪，澎湖氣候是高溫雨少、季風特強，深色的玄武岩在長年陽光照射、強烈季風吹襲下，玄武岩石礫在玄武岩盤上不斷來回滾動，由於海水在運動的時候，本身的質量和速度都很大，其侵蝕的方式有：水力的撞擊、空氣的壓縮、磨蝕、擦蝕、溶蝕等。若有颱風來襲時，巨大的風浪使得海岸崩落的玄武岩相互撞擊而粉碎，經年累月後就變成細小的黑色碎屑砂。在澎湖海岸所看見的黑色砂粒可說全是玄武岩碎屑砂。本中心收藏的標本是採集於馬公市鎖港里。
澎湖火山噴發的產物，當玄武岩隨著地殼隆起，或因海水下降的變化而露出地表之後，就開始不斷的接受風吹雨打、日晒蟲蛀之苦。而最嚴重的是海蝕作用，海蝕是指海水運動對玄武岩的破壞作用。海蝕的力量來自波浪，澎湖氣候是高溫雨少、季風特強，深色的玄武岩在長年陽光照射、強烈季風吹襲下，玄武岩石礫在玄武岩盤上不斷來回滾動，由於海水在運動的時候，本身的質量和速度都很大，其侵蝕的方式有：水力的撞擊、空氣的壓縮、磨蝕、擦蝕、溶蝕等。若有颱風來襲時，巨大的風浪使得海岸崩落的玄武岩相互撞擊而粉碎，經年累月後就變成細小的黑色碎屑砂。在澎湖海岸所看見的黑色砂粒可說全是玄武岩碎屑砂。本中心收藏的標本是採集於馬公市鎖港里。
Basalt debris is a product of volcanic eruptionin Penghu. From the moment when basalt is exposed to the earth surface due to the uplift of the earths crustthe dropping of seawater, itstortureby wind, rain, sunlightinsects begins.In fact, the most serious damage is caused by marine erosion, which refers to the damage to basaltcaused by seawater movement. The strength of marine erosion is affected by waves. Penghu has a climate characterized by hightemperature, little rainstrong monsoon. The dark basalt is formed under the long-term exposure to sunlightstrong monsoon, causing the basalt gravel to roll backforth on the basalt plate. As seawater can move in huge masshigh speed, it can erode the basalt by means of hydraulic impact, air compression, erosion, abrasion, dissolution,so on. When a typhoon hits, the huge windwaves can even cause the basalt that have already collapsed from the coast to smash into piecesturn into fine black sand over the years. It can be said that the black sand grains seen on the Penghu coast are all basalt debris. The specimens in this center were collected fromSuogang Village, MagongCity.
