Taklinobo Fm
Type Locality and Naming
Southwestern-most Inner Mongolia. The Taklinobo Fm was named by the No. 3 Party of Geology, Ningxia Hui Autonomous Region Bureau of Geology in 1973. The type locality is in Taklinobo- Aduzhangmeng Mountain, Bayanxibie area, Alxa Zuoqi, Inner Mongolia. Uppermost formation in Nuorgong Gr.
Synonym: （塔克林敖包组）; Tekelin’aobao Fm
Lithology and Thickness
Lower part is dark thin-bedded quartzite intercalated with muddy limestone. Middle part consists of variegated slate, phyllite with fine-grained quartz sandstone. Upper part of the formation is composed of stromatolite-bearing blue-grey, brown-yellow dolomite, dolomitic limestone and thin-bedded limestone. It is stable in lithology but changeable in thickness laterally, for example, it is about 4000 m thick in Zhonggashun, but only 1600 m around Aduzhangmeng Mountain-Taklinobo.
Relationships and Distribution
Lower contact
It is in conformable contact with underlying Shabugengci Fm.
Upper contact
It is in conformable contact with Bayingxibie Gr.
Regional extent
Southwestern-most Inner Mongolia. It is distributed only around Bayanxibie, Alxa Zuogi.
GeoJSON
Fossils
The main taxa of stromatolites found in the upper part are Stratifera f., and Kussiella f.
Age
Depositional setting
Additional Information
Reliable isotopic chronological data was lacking as of this 2019 Lexicon entry.