Chunabali Fm
Period:
Neogene
Age Interval:
Early Miocene?
Province:
Bhutan
Type Locality and Naming
Lesser Himalaya
Lithology and Thickness
Implied by correlation and similar facies-pattern to Dumri Fm of Nepal to be sandstone and shale.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Major unconformity (ca. 200 Myr) onto Jaishidanda Fm (Permian)
Upper contact
Disconformably overlain by the Siwalik Gr (Lower Siwalik Fm) foreland basin fill
Regional extent
GeoJSON
null
Fossils
Age
Early Miocene. Age span based on correlation to Dumri Fm, in turn to Pakistan units by K.S. Valdiya (2016; The Making of India; Springer Publ.)
Age Span:
Beginning stage:
Aquitanian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
23.04
Ending stage:
Burdigalian
Fraction up in the ending stage:
0.5
Ending date (Ma):
18.22
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Age spans estimated from correlation diagrams in Martin, A.J. (2017, "A review of Himalayan stratigraphy, magmatism, and structure", Gondwana Research, 49: 42-80; http://dx.doi.org/10.1016/j.gr.2017.04.031), but these are often controversial.