Evidence of emergence including sabkha dolostone, algal mat, bird-eyes and fenestral structure, mudcracks and crustose limonite has been found in the top of the Changhsingian reefs in Ziyun, Guizhou province.

 
  • 貴州紫云長(cháng)興期生物礁頂部存在的出露證據有:(1)形成于薩勃哈蒸發(fā)環(huán)境的白云巖,(2)藻紋層沉積,(3)鳥(niǎo)眼和窗格構造,(4)干裂縫和褐鐵礦風(fēng)化殼,等等。
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