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Pumice Collection Image, Figure 1, Total 28 Figures
Pumice Collection Image, Figure 2, Total 28 Figures
Pumice Collection Image, Figure 3, Total 28 Figures
Pumice Collection Image, Figure 4, Total 28 Figures
Pumice Collection Image, Figure 5, Total 28 Figures
Pumice Collection Image, Figure 6, Total 28 Figures
Pumice Collection Image, Figure 7, Total 28 Figures
Pumice Collection Image, Figure 8, Total 28 Figures
Pumice Collection Image, Figure 9, Total 28 Figures
Pumice Collection Image, Figure 10, Total 28 Figures
Pumice Collection Image, Figure 11, Total 28 Figures
Pumice Collection Image, Figure 12, Total 28 Figures
Pumice Collection Image, Figure 13, Total 28 Figures
Pumice Collection Image, Figure 14, Total 28 Figures
Pumice Collection Image, Figure 15, Total 28 Figures
Pumice Collection Image, Figure 16, Total 28 Figures
Pumice Collection Image, Figure 17, Total 28 Figures
Pumice Collection Image, Figure 18, Total 28 Figures
Pumice Collection Image, Figure 19, Total 28 Figures
Pumice Collection Image, Figure 20, Total 28 Figures
Pumice Collection Image, Figure 21, Total 28 Figures
Pumice Collection Image, Figure 22, Total 28 Figures
Pumice Collection Image, Figure 23, Total 28 Figures
Pumice Collection Image, Figure 24, Total 28 Figures
Pumice Collection Image, Figure 25, Total 28 Figures
Pumice Collection Image, Figure 26, Total 28 Figures
Pumice Collection Image, Figure 27, Total 28 Figures
Pumice Collection Image, Figure 28, Total 28 Figures
Pumice Collection Image, Figure 1, Total 28 FiguresPumice Collection Image, Figure 2, Total 28 FiguresPumice Collection Image, Figure 3, Total 28 Figures
Pumice Collection Image, Figure 4, Total 28 FiguresPumice Collection Image, Figure 5, Total 28 FiguresPumice Collection Image, Figure 6, Total 28 Figures
Pumice Collection Image, Figure 7, Total 28 FiguresPumice Collection Image, Figure 8, Total 28 FiguresPumice Collection Image, Figure 9, Total 28 Figures
Pumice Collection Image, Figure 10, Total 28 FiguresPumice Collection Image, Figure 11, Total 28 FiguresPumice Collection Image, Figure 12, Total 28 Figures
Pumice Collection Image, Figure 13, Total 28 FiguresPumice Collection Image, Figure 14, Total 28 FiguresPumice Collection Image, Figure 15, Total 28 Figures
Pumice Collection Image, Figure 16, Total 28 FiguresPumice Collection Image, Figure 17, Total 28 FiguresPumice Collection Image, Figure 18, Total 28 Figures
Pumice Collection Image, Figure 19, Total 28 FiguresPumice Collection Image, Figure 20, Total 28 FiguresPumice Collection Image, Figure 21, Total 28 Figures
Pumice Collection Image, Figure 22, Total 28 FiguresPumice Collection Image, Figure 23, Total 28 FiguresPumice Collection Image, Figure 24, Total 28 Figures
Pumice Collection Image, Figure 25, Total 28 FiguresPumice Collection Image, Figure 26, Total 28 FiguresPumice Collection Image, Figure 27, Total 28 Figures
Pumice Collection Image, Figure 28, Total 28 Figures
Pumice
  • reservation_info
    • serial_no2:RI11-039
    • title_en:Pumice
    • amount:1
    • :2004/04/12
  • gdesc_info
    • GDESC:　　標本RI11-039為浮石，為一種特殊的火成岩形態，浮石源自於火山噴發時含有空氣的岩漿，於噴發過程中空氣因減壓與降溫作用在岩漿中形成了大量的氣孔，但岩漿於空氣逸散前便冷卻凝固，因此形成具有許多孔洞，如海綿狀的岩石外觀。
      　　浮石並無固定的色澤，其顏色經常為棕色、黃色或灰色等淺色，成分通常為火山玻璃質，主要礦物包含石英、長石、角閃石或灰石等。浮石與火山渣的外觀相似，但浮石一般由長英質岩漿組成，而火山渣一般由鐵鎂質較高的岩漿組成，浮石的孔洞相對之下可能會比較小且孔洞外壁較薄，此外，浮石的比重通常小於1而火山渣大於1，因此浮石可浮於水面，而火山渣會沉沒於水中。
      　　浮石的分布範圍廣泛，世界上噴出性火成岩地質的地區經常可以發現浮石，臺灣於北部棉花嶼及東部蘭嶼一帶具有含浮石之沉積岩/火山碎屑岩層，於本島海濱亦可發現自外地飄來的浮石。
      　　於用途方面，浮石於工業上可以作為過濾器，此外浮石也是輕質的隔熱絕緣材料。
      　　本標本之原產地不詳，共包含多塊浮石，最大者長寬約12 x 9公分，呈現不規則塊狀並帶有許多孔洞，結晶顆粒細小，顏色為棕黑色、褐色至灰色。
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