Mawozi Fm

Northeast Sichuan-Southwest Shaanxi. The Mawozi Fm was named by the No.3 Party of Regional Geological Survey, Sichuan Bureau of Geology in 1961. The type section is in Guanba-Majiaya, Nanjiang County, Sichuan Province. It is the lower formation of the Huodiya Gr.

Synonym: （麻窝子组）

In the typical section, the Mawozi Fm consists of five parts. Lower part is an interbedding of grey, grey-white metamorphosed conglomerate with quartz sandstone. Upward it is replaced by grey-white and grey thick-bedded siliceous-dolomitic marble (264 m thick). Lower-Middle part is composed of dark-grey biotite halleflinta (=a type of metamorphic rock, formed from volcanic tuff and rich in quartz and feldspars), grey- to greyish medium- to thick-bedded dolomitic marble and dolomite sandwiched with thin-bedded laminated dolomitic marble, carbonaceous slate and silty slate (1454 m thick). Middle-Middle part consists of purple quartz silty phyllite and siliceous chlorite schist; upward it is replaced by thick-bedded banded dolomitic marble (237 m thick). Upper-Middle part is purple calcareous slate and dark-grey slate; upward it is replaced by pale grey and grey-white thin-medium-thick-bedded muddy dolomitic marble intercalated with dolomitic crystalline limestone (583 m thick). Upper part has a metamorphosed conglomerate in the base, then consists of dark-grey carbonaceous slate, purple-red slate; upward there is medium- to thick-bedded dolomitic marble (645 m thick). The dolomites and dolomite marble both in lower-middle and upper-middle parts of the formation bear stromatolites.

Conophyton f., Anabaria f., Jurusania f., Tielingella f., Inzeria f., Baicalia f., Minjaria f., Kussiella f., etc.