Some fossil bones have all the interstitial spaces filled with foreign minerals, including the marrow cavity, if there is one, while others have taken up but little from their surroundings.

• 一些石化的骨头的所有裂缝的空隙,包括骨髓空腔,都充满了外来的矿石,如果这儿还有有一个空腔当其他的空腔都已被占据,填充物很少是来源于他们的环境。