毕竟煤炭矿床本身就是石化的泥炭沼泽，而泥炭的成份是腐烂的植物。当粘土泥浆逐渐硬化成页岩石，腐烂的植物则在上面留下了它们的印记。
Coal deposits, after all, are petrified peat swamps, and peat is made from decaying plants, which leave their imprints in mud and clay as it hardens into shale stone.
矿泉水、粘土、膨润土、泥炭土、建筑用砂等资源也都十分丰富。
Natural resources as mineral water, clay, swell soil, peaty soil and building sand are also quite rich in amount.
应避免在粘土中加入泥炭，否则会保持太多水份，导致根系溺毙或腐烂。
Avoid adding peat moss to clay soils since it may retain so much water that the roots drown or rot.
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