Shanhuhe Fm
Type Locality and Naming
The type section is located at Shanhuhe, Macala, Riwoqê, Tibet. It was named by the No. 1 Geological Party of the Tibetan Bureau of Geology in 1971.
Lithology and Thickness
Sandstne, Claystone, Coal and Sandy Limestone. A suite of clastic rocks of littoral-neritic facies and locally lagoon facies. Lower part is composed of gray-yellow and gray-black moderately thick-bedded quartz sandstone, intercalated with carbonaceous-sandy shales, calcareous sandstone and clayey-sandy limestones. Middle part comprises gray-black thin- to moderately thick-bedded carbonaceous-sandy shales, clayey- carbonaceous sandstones interbedded with quartz sandstone, intercalated with multiple layers of commercial anthracite as well as carbonaceous shale and siderite-bearing sandstone (with wave ripples); 318.3 m thick. Upper part consists of gray-black thin-bedded clayey-sandy limestones as well as quartz sandstone, shale and sandy shale. Total thickness >915 m.
Relationships and Distribution
Lower contact
Unknown: The bottom is unexposed. Regionally, the next older unit is upper Devonian Dongla Gr
Upper contact
Conformable contact with the overlying Dongfengling Fm
Regional extent
Besides its distribution at Macala of Riwoqê, it is also exposed in areas such as Zijiapu, 140 km northwest of Dêngqên County, and Jagka of Zogang, but is best developed at Macala of Riwoqê, where there are mineable coal seams
GeoJSON
Fossils
Lower part yielding coral Syringopora sp. and bryozoan Fenestella sp. Middle part yields Brachiopods Antiquatonia antiquata, Punctospirifer malevkensis and Schellwienella cf. repsinki, Coral Aspidophyllum sp., and fossil plants. Upper part contains Brachiopods Gigantoproductus sp., Echinoconchus elegangs and Antiquatonia serenensis, as well as Coral Syringopora sp.
Age
Depositional setting
It is interpreted as a littoral-neritic facies and locally lagoon facies
Additional Information