facies change造句

• The usually called " kongtong conglomerate " , possiblely aged middle - late of late triassic , is the facies change sediment of the yangchang formation in the west margin of ordos basin , and its component are mainly pebbles of limestone and sandstone
  摘要“崆峒山砾岩”是延长组在盆地西缘的相变产物，可能形成于延长组中晚期（长7 -长1期） ,对应于鄂尔多斯西南缘前陆盆地形成期。