Jimunai Fm
Type Locality and Naming
The type section lies at Sarbulak Gully, southwest of Harjiawu, Jimunai (Jeminay) County, Xinjiang. It was named by Zhang Zixin in 1986.
Lithology and Thickness
Volcanics and Sandstone. A suite of continental pyroclastic rocks, clastic rocks and intermediate-acid lava, intercalated with mineable coal seams. At the named locality, it is composed of feldspar porphyry volcanics, diabase-porphyrite, andesitic porphyrite, acid volcanic breccia, pebble sandstone, fine-grained sandstone and siliceous siltstone. Exposed thickness 592 m.
In the Nalinkalatawu area, it is composed of dark green thick-bedded tuffs and basalt porphyrite in the upper part, and gray thick-bedded calcareous lithic sandstone intercalated with fine-grained conglomerate and sandy limestone in the lower part, also containing Ancara flora. Exposed thickness 1416.6 m; neither the top nor the bottom are seen.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Lower Carboniferous (either Hongshanzui Fm or coeval Nalinkala Fm)
Upper contact
Conformable contact with the overlying Qiaqihai Fm
Regional extent
Distributed at the north slope of Sawuer Mt. and around Nalinkalatawu.
GeoJSON
Fossils
Plants Angoropteridium cardiopteroides and Calamites cistipormis
Age
Depositional setting
It is interpreted as a
Additional Information