Manuel Quiring

化石拍卖

一块来自马达加斯加的极为完好保存的化石木片。地质时期：下侏罗纪。颜色美丽，木纹清晰并得到极好保存，质量确实优秀。

注意在数百万年的时间里木材裂缝中形成的美丽矿物晶体。

这是来自马达加斯加安比洛布（Ambilobe）的一块宽圆形的石化木（Araucaria）。Araucaria是一科的针叶树，包含现代的Monkey Puzzle tree（猴谜树/猴谜树属）。这块1500万年前的石化木已在两面被切割并打磨，能够轻松看到令人惊叹的内部木纹细节和美丽的着色。

石化木（petrified wood）指经过矿物置换过程而变成石头的木材。在这一过程中，所有有机物被矿物质所取代，而原有的结构（如树轮）在保留的大部分情况下仍得以保留。要实现这一点，木材需要埋入氧气含量低、且有流动、富含矿物质的水的环境中，以便矿物取代结构。着色则由在化石化过程中水中存在的各种矿物/杂质所致。例如，红色在很多情况下可归因于铁化合物，绿色则与铜有关，等等。）

A really well preserved fossil wood slice from Madagascar. Period Lower Jurassic. Beautiful colors, evident and beautifully preserved wood texture, truly excellent quality. 
Note the beautiful mineral crystallization created over millions of years inside the cracks of the wood
This is a wide round of petrified wood (Araucaria) from Ambilobe, Madagascar. Araucaria is a coniferous tree in the family that includes the modern Monkey Puzzle tree. This 220 million year old petrified wood has been sliced and polished on both sides, allowing the stunning inner wood detail and beautiful coloration to easily be seen.
Petrified wood is the name given to wood that has been turned into stone (fossilized) through the process of permineralization. In this process, all of the organic matter becomes replaced by minerals, while much of the original structure, such as tree rings, is retained. For this to happen, the wood needs to be buried in an environment low in oxygen to prevent decomposition and with flowing, mineral-laden water, so minerals may replace structures. The coloration is caused by various minerals/impurities present in the water during fossilization. For example, red colors in many cases can be attributed to iron compounds, greens due to copper, and so on

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木化石 - 化石木材 - 42 cm - 31 cm

侏罗纪， 下 （2.013 - 1.741 亿年） - 马达加斯加

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木化石 - 化石木材 - 42 cm - 31 cm

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