Sedimentary features show that sedimentary structure generally occur in shallow lakes and creature genesis structure growing, waterplane rise→decline depositoinal cycle obviously.
湖泊沉积构造发育，生物富集，
进→退沉积旋回
明显。
(位)面，线(平)面；
机Sedimentary features show that sedimentary structure generally occur in shallow lakes and creature genesis structure growing, waterplane rise→decline depositoinal cycle obviously.
湖泊沉积构造发育，生物富集，进→退沉积旋回明显。
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