Rangmal Fm
Type Locality and Naming
The type location is in Rangmal village northern limb of the Liddar anticline. [Original Publication: Srikantia, S.V., Bhargava, O.N. 1983. Geology of the Palaeozoic sequence of the Kashmir Tethys Himalaya in the Lidder Valley. Journal Geological Society of India, 24 (7): 363-377.]
Synonyms: Karihul Fm (Kumar et al., 1987)
Lithology and Thickness
Claystone to Sandstone. 400 m The Rangmal Formation consists of shale, siltstone, quartz arenite and limestone with bivalve and gastropod shell and algal remains.
Relationships and Distribution
Lower contact
Conformably overlies the Shumal Fm with a gradational contact.
Upper contact
Unconformably overlain by the Hallamulla Fm.
Regional extent
The Shumal Fm and the Rangmal Fm together form equivalent of the Kunzam La Fm of the Spiti Valley—the Rangmal Formation is thicker equivalent of the Parahio Member of the Kunzam La Fm.
GeoJSON
Fossils
Trilobite: Damesella shergoldi (Changhian) in basal part, and Cyclolorenzella sp, Monkapsis cf M. serrata and Blackwederia sp.
Age
Depositional setting
The common bedding features include lenticular bedding, flaser bedding, low-angled cross-bedding, festoon bedding and subparallel bedding. It represents several prograding cycles from subtidal to supratidal environment.
Additional Information