Tirathgarh Fm
Period:
Calymmian
Age Interval:
late Calymmian
Province:
Proterozoic S.India Indravati Basin
Lithology and Thickness
Conglomerate, sub-arkose sandstone, quartz arenite.
[Figure: Indravati basin field photographs illustrating lithology and sedimentary structures in different formations. (A) Tiratgarh Fm (Chitrakot Sandstone Member) - laterally persistent wavy bedded mature quartz arenite. (B) Jagadalpur Fm - Birsaguda tuff. (from Saha et al., 2016)]
Lithology Pattern:
Coarse-grained sandstone
Relationships and Distribution
Lower contact
Major unconformity on basement of granite gneiss and greenstone belt
Upper contact
Overlain by Cherakur Fm siltstone
Regional extent
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Calymmian
Fraction up in beginning stage:
0.75
Beginning date (Ma):
1,450.00
Ending stage:
Calymmian
Fraction up in the ending stage:
1.0
Ending date (Ma):
1,400.00
Depositional setting
Alluvial fan, followed by shallow shelf (mainly beach and tidal flat)
Depositional pattern:
Additional Information
Compiler:
From: Saha D. (Dilip), Patranabis-Deb, S., and Colllins, A.S. (2016) Proterozoic stratigraphy of southern Indian cratons and global context. In: Stratigraphy & Timescales, 1: 1-59.