Buran Fm
Period:
Paleogene
Age Interval:
Early Oligocene
Province:
Zaisan (Zaysan) Basin - East
Lithology and Thickness
Upper part is 9.5 m of Greenish-gray, green, and locally brown clays with iron oxide spots and interlayers of light gray siltstones and fine-grained light greenish-gray sands. Lower part is 10.1 m of Light gray sands, locally heavily ferruginous - brown, variably grained with interlayers of greenish-gray clays, locally brown with iron crusts.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Unconformable onto the Aksyir Fm
Upper contact
Unconformably overlain by the Oshagan Fm
Regional extent
GeoJSON
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Fossils
Age
Early Oligocene (Rupelian); bound by minor hiatuses of uncertain extent (not included in age span here)
Age Span:
Beginning stage:
Rupelian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
33.90
Ending stage:
Rupelian
Fraction up in the ending stage:
1.0
Ending date (Ma):
27.29
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Information provided by Nariman Jamikeshev from Kazakh-language sources and from other publications.