It's possible because the mycelium produces oxalic acids, and many other acids and enzymes, pockmarking rock and grabbing calcium and other minerals and forming calcium oxalates.
它是可能的，因为菌丝产生草酸 和许多其它的酸和酶， 风化岩石和攫取钙和其它矿物质 形成草酸钙。