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Milam Formation
Click to display on map of the Ancient World at:
Milam Fm base reconstruction

Milam Fm

Period: 
Cambrian

Age Interval: 
Early-Middle Cambrian (??)


Province: 
NW Himalaya Kumaun-Garhwal Tethyan Himalaya

Type Locality and Naming

Reference section: Milam Village, Gori-Ganga Valley, Pithoragarh . Name derived from Milam Village (Gori-Ganga Valley). [Original Publication: Kumar, S., Singh, I.B., Singh, S.K. 1977. Lithostratigraphy, structure, depositional environment, palaeocurrent and trace fossils of the Tethyan sediments of Malla Johar area, Pithoragarh-Chamoli districts, Uttar Pradesh, India. Jour. Pal. Soc. India, 20, 396-435]

[Figure 1: Location of the Kumaun-Garhwal region (from Celerier et al., GSA Bull 2009)]

[Figure 2: Geologic map of the Kumaun-Garhwal region (from Celerier et al., GSA Bull 2009)]


Lithology and Thickness

Siltstone. Comprise greenish siltstone, phyllite and quartzite with lenses of limestone. >500 to 3000 m thick


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

Conformable with underlying the Bilju Fm.

Upper contact

Unconformable (angular unconformity) with the overlying Ralam Fm.

Regional extent

Kumaun to Garhwal regions


GeoJSON

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Fossils

Trilobite: Redlichia sp. (Kackar and Srivastava, 1996; Jamwal et al., 1990; Myrow et al., 2018). Trace fossils are Planolites sp., P. serpense; P. vergatus; P. reticulates; ?Chondrite sp. (Jamwal et al., 1990)


Age 

Cambrian (and maybe latest Precambrian). No specific age within the Cambrian system is assigned. Considering it is up to 3 km thick of clayey siltstone, then shown as extending to base-Cambrian for graphic purposes.

Age Span: 

    Beginning stage: 
Cambrian Stage 2

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
529.00

    Ending stage: 
Drumian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
500.50

Depositional setting

Marine shallow water environment.


Depositional pattern:  


Additional Information


Compiler:  

Birendra Singh & O.N. Bhargava.