Pangsari Fm
Period:
Statherian, Calymmian
Age Interval:
latest Statherian-earliest Calymmian
Province:
Bhutan
Type Locality and Naming
Lesser Himalaya
Lithology and Thickness
Dark-green to dark-gray, thin-bedded to laminated, locally talcose phyllite interbedded with white, pink, and green, medium- to thick-bedded dolostone and marble, and green, fine- to medium-grained, thin-bedded quartzite (Bhargava, 1995; Tangri, 1995a). Maximum exposed thickness is 2,400 m (Tangri, 1995a).
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Major unconformity (ca. 400 Ma) onto Daling Fm
Upper contact
Conformably (?) below Sikkim Dolostone Fm
Regional extent
GeoJSON
null
Fossils
Age
Martin (2017) shows equivalence to clayey sandstone of Nourpui Fm of Nepal Lesser Himalaya; and his same schematic age span at ca. 1600 Ma is used here.
Age Span:
Beginning stage:
Statherian
Fraction up in beginning stage:
0.95
Beginning date (Ma):
1,610.00
Ending stage:
Calymmian
Fraction up in the ending stage:
0.05
Ending date (Ma):
1,590.00
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extract from Legend to "Geologic Map of Bhutan" (Long, S., McQuarrie, N., et al., 2011, Journal of Maps). 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.