Liushugou Fm
Type Locality and Naming
The type section is located at Liushugou of the Urümqi−Daxihe area, Xinjiang. It was named by Tan Deyao et al. in 1965, and formally cited in Regional Stratigraphic Scale of Xinjiang in 1981.
Lithology and Thickness
Volcaniclastics and Volcanics. Dominated by gray−green andesitic volcanic breccia, agglomerate and tuffs, followed by andesitic porphyrite, felsite to porphyry, dacitic tuffaceous lava and basalt porphyrite. Exposed thickness 2196 m. Going eastward, normal clastic rocks and limestones increase while volcanic lavas decrease, and thickness reduced to 1181 m.
Relationships and Distribution
Lower contact
Unknown: Underlying stratum not seen
Upper contact
Unconformable contact with the overlying Qijiagou Fm
Regional extent
Distributed on the west end of Bogda, extending in a nearly E-W trend.
GeoJSON
Fossils
Containing Brachiopod Dictyoclostus sp.; Corals Tachylasma sp., Lophophyllidium sp., Bradyphyllum sp.; Fastropods Paromphalus sp., Omphalonema multispiralis, Bellerophon sp. as well as bivalves, cephalopods, etc.
Age
Depositional setting
It is interpreted as a neritic intermediate-acid to intermediate pyroclastic rock intercalated with lava.
Additional Information