Baoquanling Fm
Type Locality and Naming
Songliao Basin. The naming section is located in the No. 59-2 well section in the Second Farm of the Baoquanling Farm, Luobei County northeast of Hegang City, Heilongjiang Province. Named by the Bureau of Geology, Heilongjiang Bureau of Fuel Industry in 1965 and published in the Regional Stratigraphic Table of Heilongjiang Province in 1979.
Lithology and Thickness
Grayish green, gray or grayish white sandy conglomerate, sandstone, siltstone and mudstone with several beds of lignite and oil shale. The thickness is 800–1400 m in the Baoquanling area; the formation is 2788 m thick when extending southward to the vicinity of Zhenxing Township, Tangyuan County, and 714 m thick when extending southward to the Daxing Farm, Fujin County.
Relationships and Distribution
Lower contact
The formation is overlain by the Neogene Fujin Fm or the Quaternary.
Upper contact
Underlain unconformably by the Late Cretaceous Songmuhe Fm.
Regional extent
No outcrop is found at the surface; all the rocks are encountered by the wells. It is mainly distributed in the Baoquanling area.
GeoJSON
Fossils
It has the plant Zelkova ungeri etc. and sporopollen.
Age
Depositional setting
It is a sequence of fluvio-lacustrine-swampy fine clastic deposits with coals formed at the warm-wet climate.
Additional Information