Fig. 3From: First record of ostracods from the Upper Ordovician red-coloured marine sandstones of the Tierekeawati Formation in Tarim Basin, NW China: implications on palaeoenvironment and palaeobiogeographya Field overview for the Arisu red beds of the lower Tierekeawati Formation; b Field photo shows the disconformity contact between the Yingan Formation and the Arisu red beds of the Tierekeawati FormationBack to article page