Although the scientists don't understand how the blackmineral converts into the red one, they think it's due to a chemical reaction with the eroded sand.
尽管科学家们不理解黑色的矿物如何转变为红色的矿物，他们认为这是由于对于侵蚀的砂子的一种化学反应。
2
A black magnetic mineral consists of magnesium carbonate.