Sangtamu Fm
Period:
Ordovician
Age Interval:
Katian, (19)
Province:
Xinjiang
Type Locality and Naming
The type section is in Lunnan area of Tarim basin. It was named by … [waiting for details]
Synonym:
Lithology and Thickness
"The 5-6159 m well section is typical for the Sangtamu Formation Profile, for large set of gray, gray-green clastic deposits. The bottom is carbonate rock, and the middle-upper part is sandwiched with multi-layer limestone, with a thickness of 720 m." [from: XU Lun-xun, XIAO Chuan-tao, ZHU Zhong-de, HU Ming-yi, LI Xiang ming, 2004. Correlation and Classification of Upper Ordovician Sangtamu Formation in Lunnan Area, Tarim Basin. Xinjiang Petroleum Geology, 25(4)]
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
It overlies the Lianglitag Fm.
Upper contact
The next younger unit is the Kepingtag Fm of early Silurian.
Regional extent
GeoJSON
null
Fossils
Age
Katian.
Age Span:
Beginning stage:
Katian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
449.73
Ending stage:
Hirnantian
Fraction up in the ending stage:
1.0
Ending date (Ma):
443.07
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Jianpo Wang and Xiaofeng Wang