North Zaisan Fm
Period:
Paleogene
Age Interval:
Paleocene
Province:
Zaisan (Zaysan) Basin - Central
Type Locality and Naming
Synonym: North Zaysan Fm, North Zaisanskaya, E1nz
Lithology and Thickness
Ca. 75 m of Sandy clay.
Lithology Pattern:
Siltstone
Relationships and Distribution
Lower contact
Unconformable (Late Jurassic through Cretaceous is absent, partly due to regional erosion) onto the Middle Jurassic sands of the Kustin Fm.
Upper contact
Underlies the Zimunai Fm
Regional extent
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[82.65,48.87],[82.85,48.54],[82.61,48.18],[82.25,48.02],[83.07,47.29],[83.97,47.33],[84.52,48.24],[84.6,48.4],[84.1,48.36],[83.67,48.66],[83.49,48.97],[82.65,48.87]]]]}}
Fossils
Age
Paleogene (Danian-Thanetian); although base is not clarified
Age Span:
Beginning stage:
Danian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
66.04
Ending stage:
Thanetian
Fraction up in the ending stage:
1.0
Ending date (Ma):
56.00
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Information provided by Nariman Jamikeshev from Kazakh-language sources and from other publications.