Ramdurg Fm
Type Locality and Naming
Lowermost formation (1 of 9) of Kaladgi Gr and of its Lokapur Subgroup (1 of 6)
Lithology and Thickness
Sandstone: Basal conglomerate, immature feldspathic-to-quartz sandstone.
[Figure: Ramdurg Fm, Kaladgi Gr, field photographs illustrating lithology and sedimentary structures. (A) Basal conglomerate, massive, ungraded with subrounded to well-rounded clasts floating in very coarse-grained sandstone matrix, (B) coarse-grained feldspathic sandstone from the lower part of the succession, (C) planar parallel beds of quartz arenite alternating with mud rich intervals, representing successive coarsening up cycles. (from Saha et al., 2016)]
Relationships and Distribution
Lower contact
Major angular unconformity on Dharwar schist, Hungund schist belt, Closepet granite (Archean)
Upper contact
Overlain by Malaprabha Fm shale
Regional extent
GeoJSON
Fossils
Age
Depositional setting
Fan-delta, pro-delta to shallow shelf. The rifting stage of the basin evolution is attested by the deposition of texturally and mineralogically immature sandstone deposited in a major fault-controlled basin, and was followed by the early subsidence stage. Extensive tidal shelf sandstone bars were deposited when the basin went through quiescent phase of basin development.
Additional Information