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Mulug Gr
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Mulug Gr base reconstruction

Mulug Gr

Period: 
Calymmian

Age Interval: 
early Calymmian


Province: 
Proterozoic S.India Pranhita-Godavari west basin

Type Locality and Naming


Lithology and Thickness

Conglomerate, sandstone and minor chert. Upward succession of Jakaram Conglomerate Fm, Ramgundam Sandstone Fm, Enchencheruvu Chert Fm, and Rajaram Fm. Up to 700 m. (Fig. – images C and D)

[Figure: Pranhita-Godavari valley basin Field photographs illustrating lithology and sedimentary structures. (A) Bollapalli Fm - Sandstones. (B) Pandikunta Limestone Fm - Stromatolites. (C) Jakaram Conglomerate Fm (Damala Gutta Conglomerate Fm) in lower part of Mulug Gr lower part of Mulug Gr - Intercalated conglomerate and sandstone. (D) Rajaram Fm - Limestones. (E) Sullavai Gr Venkatpur Sandstone Fm - Large aeolian cross-strata. (F) Albaka Gr - Cross-stratified sandstone. (G) Somandevara Quartzite Fm - Rippled unit. (H) Bodela Vagu Fm - Laminated lime mudstone. (from Saha et al., 2016)]


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Unconformity, overlies Karlai Shale Fm (Pandikunta Shale Fm) at top of Mallamapalli Gr

Upper contact

Unconformity, overlain by Nalla Gutta Sandstone Fm of Pengnaga Gr

Regional extent

Approximately coeval with Somanpalli Gr in Pranhita-Godavari east basin


GeoJSON

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Fossils


Age 


Age Span: 

    Beginning stage: 
Calymmian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
1,600.00

    Ending stage: 
Calymmian

    Fraction up in the ending stage: 
0.25

    Ending date (Ma):  
1,550.00

Depositional setting

Basal alluvial fan, upward deepening through tidal flat, chert-dominated outer shelf, then shallowing to back-lagoon 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.