For several hundred thousand years after this rain forest was entombed , tree ferns , lycopsids and other plants competed for dominance - " a kind of vegetational chaos , " says dimichele .

在这片雨林被埋葬前的几十万年里，数蕨、石松和其他植物争先恐后抢夺这里的生存优势dimichele表示：“那里的植被有点混乱。”

They think that the climate change from wet-hot , warm-wet , little cold-wet , to cold-drought , and the vegetational evolution from forest , bush , to grassland in zhada area .

结果表明，札达地区上新世-早更新世气候经历了从湿热-温暖潮湿-偏冷潮湿-寒冷干旱的变化，以及植被从森林-灌木-草原的逐渐演化。