"Anachronistic facies" refers mainly to carbonate sediments that reflect peculiar marineenvironments,most of which are related to microbial activities.
在藏北比如县南牙乡玛双布在玛双布一带,上三叠统波里拉组发育震积事件的沉积记录。波里拉组是发育于羌南一保山地层区索县一左贡地层分区最南缘与斑一怒带的结合处,呈北西西向展布,岩性为浅灰一灰色块状白云质灰岩、泥晶灰岩及灰色结晶灰岩等,为滨浅海相碳酸盐台地沉积,含六射珊瑚Montlivaltiatenuse Deng et Zhang 等化石,时代为晚三叠世。