Yamne Fm
Period:
Permian
Age Interval:
Upper Permian
Province:
Arunachal Pradesh
Type Locality and Naming
Yamne Valley. Arunachal Pradesh, Southern slope of Dalbuing village in the Yamne nala, Arunachal Pradesh. [Original Publication: (Kumar, G., 1997. Geology of Arunachal Pradesh. Geol. Soc. Ind. Bangalore: 1-217]
Lithology and Thickness
Claystone. Pale brown ferruginous shale. Its thickness is about 5 m.
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Unconformably underlain by Abor Volcanic Fm.
Upper contact
Unconformably overlain by Geku Fm (Paleocene). This seems to imply a hiatus (or erosional removal of cover) spanning the entire Mesozoic.
Regional extent
Easternmost Lesser Himalayas. Southern slopes of the Dalbiung in the Yamne Valley.
GeoJSON
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Fossils
Bivalves: Aviculopecten sp., Burmesia sp.; Brachiopods: Productus sp., Spirifer sp.; Gastropods: Loxonema sp., Neilsonia sp.
Age
Upper Permian
Age Span:
Beginning stage:
Capitanian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
261.94
Ending stage:
Wuchiapingian
Fraction up in the ending stage:
0.5
Ending date (Ma):
256.89
Depositional setting
Depositional pattern:
Additional Information
Compiler:
D.S.N Raju