Kaigenbulak Fm
Period:
Carboniferous
Age Interval:
middle Carboniferous (mid-Visean to Serpukhovian?)
Province:
Zaisan (Zaysan) Basin - East, Zaisan (Zaysan) Basin - Central
Type Locality and Naming
Synonym: Kaigenbulakskaya; C2kg
Lithology and Thickness
Ca. 450 m (bottom not reached) of Compact tuff, tuff breccia, andesite and andesite-basalt porphyry. Low (3-5% porosity. Sandstone and claystone in sharp subordinate volume.
Lithology Pattern:
Volcanic ash
Relationships and Distribution
Lower contact
Unknown (not penetrated)
Upper contact
Unconformably overlain by Akansai Fm.
Regional extent
Not given; but assigned here to entire basin.
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[83.93,48.26],[84.45,48.03],[84.98,47.95],[85.39,47.97],[85.51,47.51],[85.46,47.38],[85.22,47.33],[84.8,47.34],[84.32,47.42],[84.01,47.58],[83.87,47.54],[83.83,47.42],[83.99,47.29],[84.57,47.2],[84.65,47.05],[84.4,47.04],[84.02,47.13],[83.8,47.23],[83.53,47.36],[83.36,47.5],[83.16,47.41],[82.79,47.61],[82.38,47.83],[82.2,48.07],[82.3,48.19],[82.33,48.36],[82.44,48.4],[82.71,48.35],[82.84,48.41],[82.91,48.64],[83.19,48.7],[83.56,48.55],[83.93,48.26]]]]}}
Fossils
Age
middle Carboniferous (mid-Visean to Serpukhovian?); hiatus at top (latest Serpukhovian?) included in age span here.
Age Span:
Beginning stage:
Visean
Fraction up in beginning stage:
0.65
Beginning date (Ma):
336.08
Ending stage:
Serpukhovian
Fraction up in the ending stage:
1.0
Ending date (Ma):
323.40
Depositional setting
Depositional pattern:
Additional Information
No oil shows or heightened gas evidence has been noted.
Compiler:
Information provided by Nariman Jamikeshev from Kazakh-language sources and from other publications.