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Tilicho Lake Formation
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Tilicho Lake Fm base reconstruction

Tilicho Lake Fm

Period: 
Carboniferous

Age Interval: 
earliest Carboniferous (Tournaisian)


Province: 
Nepal Tethyan Himalaya

Type Locality and Naming

Tilicho Lake Fm (Bordet et al., 1967).

Synonym: Ice Lake Fm (Bodenhausen et al., 1964); Bangba Gompa Fm (Bordet et al., 1975).


Lithology and Thickness

Ramp carbonate. "richly bioclastic shallow-water limestones"


Lithology Pattern: 
Limestone


Relationships and Distribution

Lower contact

Disconformably overlies the Tilicho Pass Fm mudstone (late Devonian)

Upper contact

Disconformably overlain by the Marsyandi Fm

Regional extent

"reduced to a few metres in central Dolpo and completely eroded during the subsequent rifting stage in western Dolpo (Fuchs, 1977). The unit is also locally missing in the Burhi Gandaki/Shiar area (Fuchs and Paudel, 1998)."


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[80.9,29.9],[81.03,29.45],[82.61,28.65],[84.89,27.99],[85.62,27.89],[86.24,27.65],[87.74,27.11],[87.96,26.99],[87.9,27.71],[87.23,27.61],[86.24,27.74],[85.64,28.03],[84.46,28.38],[82.74,29.23],[80.9,29.9]]]]}}

Fossils


Age 

Earliest Carboniferous (Tournaisian)

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
359.30

    Ending stage: 
Tournaisian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
346.73

Depositional setting


Depositional pattern:  


Additional Information

"widespread deposition of fossiliferous ramp carbonates took place at earliest Carboniferous times [Tilicho Lake Fm]. The second part began with continental rifting in the Early Carboniferous ("rift stage''). … After the major transgression recorded in the Late Devonian from Nepal to Spiti and as far as N. Karakorum (Talent and Yolkin, 1987, in Flügel and Tintori, 1993), shelf limestones deposited in warm tropical climates finally became widespread all along the Tethys Himalaya in the Tournaisian."


Compiler:  

Extracted from Garzanti (1999, "Stratigraphy and sedimentary history of the Nepal Tethys Himalaya passive margin", Jour. Asian Earth Sci., 17: 805-827]