Results have shown that the TONSTEINS are all synsedimentary acid volcanic ash,which were turned to relatively pure kaolinitic mudstone through hydrolysis and diagenesis in peat moor environment.

• 结果表明 ,它们都是同沉积的酸性火山灰 ,在泥炭沼泽环境下 ,经过水解和后期成岩作用 ,转变成质地较纯的高岭石粘土岩。