Sarybulak Fm
Period:
Neogene
Age Interval:
middle Miocene
Province:
Zaisan (Zaysan) Basin - East
Type Locality and Naming
Synonym: N1sr
Lithology and Thickness
Upper unit is 20.0 m of Green, greenish-gray, and brownish-green clays with interbeds of light greenish-gray sands, locally ferruginous, yellowish-brown in color, fine- and medium-grained, and green, light greenish-gray siltstones. Lower unit is 18.3 m of Quartz-feldspar, micaceous (polymictic) sands, light greenish-gray, brownish-yellow, fine- and very fine-grained with occasional interbeds of green clays, light gray sandstones, gray gravel-pebble conglomerates, and siltstones and sandstones.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Unconformable onto the Zaisan Fm
Upper contact
Unconformably overlain by the Kalmakpai Fm
Regional extent
GeoJSON
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Fossils
Age
middle Miocene; bound by minor hiatuses of uncertain extent (not included in age span here)
Age Span:
Beginning stage:
Serravallian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
13.82
Ending stage:
Tortonian
Fraction up in the ending stage:
0.5
Ending date (Ma):
9.44
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Information provided by Nariman Jamikeshev from Kazakh-language sources and from other publications.