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| 題 名 | 頭嵙山地層石化硬木研究 |
|---|---|
| 作 者 | 陳玉秀; | 書刊名 | 林產工業 |
| 卷 期 | 9:3 1990.09[民79.09] |
| 頁 次 | 頁49-56 |
| 分類號 | 359.411 |
| 關鍵詞 | 石化; 地層; 硬木; 頭嵙山; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究取材自新竹縣關西鎮頭嵙山地層發現之石化硬木(petrified hardwood)。其地質年代為上新世(Pliocene)至更新世(Pleistocene)之間,距今約一百八十萬年。此石化木經X-光粉末繞射(X-ray powder diffraction)分析顯示,其主要成分為石英(quartz)。即二氧化矽,不含有色金屬礦物,且鐵灰色之燧石(flint)狀態,其質硬堅如鐵,以鐵鎚擊之,即避自火花。此石化木雖已矽化(silicification),且失去原有木材之物理及化學性質,但從外形上仍可觀察到木材原有之特徵,如生長輸(growth ring)、木質線(wood ray)及木理(grain)等。而將其磨成薄片,在光學顯徵鏡下可追蹤到木材之細胞如導管(vessel)及填充體(tyloses)之輪廓。 |
| 英文摘要 | A chunk of the petrified hardwood was studied by light microscopy and X- ray powder diffraction method. It was found that the organic chemical components of the natural wood tissues of the petrified wood studied were almost completely substituted by silicon dioxide during long period of silicification. Nevertheless, some of the gross and minute features of the original hardwood could still clearly be seen by the naked eye or with the assistance of a microscope. The petrified hardwood for this study was hard and grey in color with the appearance of rock or slint, although this wood fossil showed the grain-like figure on the lateral view and the growth rings-like concentric rings on the transverse view similar to the natural wood. The vessel elements which are characteristic to the hardwood were found to be solitary or 2-3 in series with or withouttyloses included or even occluded in the pores. Tyloses were found to be uniseriate, branched or sclerostic, with thin- or thick-walled. |
本系統中英文摘要資訊取自各篇刊載內容。