TERTIARY TERRESTRIAL一MARINE TRANSITIONAL CARBONATIES IN KUQA BASIN,XINJIANG

Fiuqa Basin, a R4esozoic and Cainozoic basin,is situated in the northern margin of the Tarim Basin and south of the Tianshan Mountians. There were only terrigenous detrital rock assemblage in the Triassic, Jurassic and Cretaceous beds, The Early Tertiary ingression to Kuqa Basin too(c place in the Tethys and brought marine fossils(Modiolus elegans, Podamides sp. Corbula sp. Podamidae, etc.)into the T ertiary carbonatitec deposits. So we call the carbonatites terrestrial- marine transitional carbonatites.