Ashutas Fm
Period:
Paleocene
Age Interval:
Late Oligocene
Province:
Zaisan (Zaysan) Basin - Central
Type Locality and Naming
Synonym: Ashutasskaya, E3as
Lithology and Thickness
Ca. 70 m of Aleurite (silty) clay interfingering with aleurite (silt); Non-calcareous grey rocks.]
Lithology Pattern:
Siltstone
Relationships and Distribution
Lower contact
Overlies the Tuzkabak Fm
Upper contact
Underlies the Aral Fm with a very gradual contact.
Regional extent
GeoJSON
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Fossils
Age
late Oligocene (shown as upper third of Oligocene)
Age Span:
Beginning stage:
Chattian
Fraction up in beginning stage:
0.25
Beginning date (Ma):
26.22
Ending stage:
Chattian
Fraction up in the ending stage:
1.0
Ending date (Ma):
23.04
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Information provided by Nariman Jamikeshev from Kazakh-language sources and from other publications.