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Papaghni Gr
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Papaghni Gr base reconstruction

Papaghni Gr

Period: 
Orosirian

Age Interval: 
middle Orosirian


Province: 
Proterozoic S.India – Cuddapah basin

Type Locality and Naming

Named after the Papaghni sub-basin.


Lithology and Thickness

Lower Group of the Cuddapah SuperGroup. Contains a lower Gulcheru Quartzite Fm and upper Vempalle Fm (dolomite, etc.). Total of 2110 m.

[Figures: Field photographs showing lithology and sedimentary features in the Papaghni Gr of the Cuddapah Supergroup. Gulcheru Quartzite Fm - (A) basal conglomerate overlying granitic basement off Parnapalli; and (B) pebbly grit grading to rough cross-stratified coarse sandstone. (C) Heterolithic sandstone-shale at Gulcheru Quartzite Fm / Vempalle Fm transition. (D) Vempalle Fm - stromatolitic limestone, (E) Pulivendla Quartzite Fm - basal conglomerate; note silicified stromatolite remnant in a large pebble. Tadpatri Fm - (F) silicified stromatolite (hemispheroidal forms) intercalated with basaltic flow (dark band). (from Saha et al., 2016)]


Lithology Pattern: 
Sandy limestone


Relationships and Distribution

Lower contact

Major unconformity onto weathered basement. Exposed on the arcuate western boundary of the Papaghni sub-basin where arkosic sandstones and conglomerates of the Gulcheru Quartzite Fm unconformably overlie the weathered granitic gneiss of the Dharwar batholith with slivers of greenstone belts (Archean)

Upper contact

Terminates in an unconformity; then overlain by Pulivendla Quartzite Fm (lower Chitravati Gr)

Regional extent

Relatively older part of the sedimentary succession is restricted to the Papaghni subbasin and constitutes the bulk of the Cuddapah Supergroup


GeoJSON

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Fossils


Age 

None given. Constrained by ca. 1900 Ma base of overlying group; yet being classified as Paleoproterozoic. Arbitrary put here as 1950 to 1920 Ma for graphic purposes

Age Span: 

    Beginning stage: 
Orosirian

    Fraction up in beginning stage: 
0.4

    Beginning date (Ma): 
1,950.00

    Ending stage: 
Orosirian

    Fraction up in the ending stage: 
0.52

    Ending date (Ma):  
1,920.00

Depositional setting

Alluvial at base to inner shelf at top


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.