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Godavari Limestone Formation
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Godavari Limestone Fm base reconstruction

Godavari Limestone Fm

Period: 
Silurian

Age Interval: 
early Silurian


Province: 
Nepal Lesser Himalaya

Type Locality and Naming

Katmandu region (Tethyan sequence)


Lithology and Thickness

"The Godavari Limestone is the youngest sequence of the Tethyan rocks, constituting the Phulchauki Gr in central Nepal. The lower section of the Godavari Limestone is represented by well-bedded argillaceous limestone of green and purple colors with wave ripples. A number of these beds are packed with crinoids. Overlying the fossiliferous limestone is a massive, coarsely crystalline, white to light brown dolomite, which comprises the main part of the formation." Ca. 300 m thick.


Lithology Pattern: 
Dolomite


Relationships and Distribution

Lower contact

The slates of Chitlang Fm transitionally pass into the lower part of the Godavari Limestone Fm containing crinoids (Stöcklin and Bhattarai 1977, p. 32).

Upper contact

Quaternary?

Regional extent

The Godavari Limestone forms the summit of Phulchauki. It also forms the core of the Phulchauki syncline as well as the Mahabharat Synclinorium.


GeoJSON

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Fossils


Age 

Martin (2017) suggests a facies correlation to the limestone facies of the upper two-thirds of the Dark Band Fm of the Tethyan Himalaya, which is early Silurian.

Age Span: 

    Beginning stage: 
Aeronian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
440.49

    Ending stage: 
Telychian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
432.93

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Descriptions from Megh Raj Dhital (2015, Geology of Nepal: Regional Perspective of the Classic Collided Orogen, Springer Publ., 499 pp.). Age spans estimated from correlation diagrams in Martin, A.J. (2017, "A review of Himalayan stratigraphy, magmatism, and structure", Gondwana Research, 49: 42-80; http://dx.doi.org/10.1016/j.gr.2017.04.031), but these are often controversial.