Diuri Fm
Period:
Permian
Age Interval:
earliest Permian
Province:
Bhutan
Type Locality and Naming
Lesser Himalaya
Lithology and Thickness
Pebbly mudstone; extremely thick. Green-gray, pebble- to cobble-, slate-matrix diamictite (Gansser, 1983; Tangri, 1995b; Long et al., 2011A). Conglomerate at base along Kuri. Thickness of 2.3 to 3.1 km (Long et al., 2011A).
Lithology Pattern:
Glacial till
Relationships and Distribution
Lower contact
Major unconformity (Ordovician through Carboniferous are absent) onto Phuentaholing Fm (upper Baxa Gr).
Upper contact
Conformably (?) overlain by Jaishidanda Fm.
Regional extent
GeoJSON
null
Fossils
Age
Earliest Permian (and maybe latest Carboniferous?)
Age Span:
Beginning stage:
Asselian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
296.21
Ending stage:
Artinskian
Fraction up in the ending stage:
0.5
Ending date (Ma):
286.91
Depositional setting
Glacio-marine; similar to formations of same late-Artinskian through Sakmarian elsewhere in northern India, Himalayas, Thailand, Yunnan, etc.
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.