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Khreuh Formation
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Khreuh Fm base reconstruction

Khreuh Fm

Period: 
Triassic

Age Interval: 
Anisian to Ladinian


Province: 
NW Himalaya Kashmir Basin

Type Locality and Naming

[Original Publication: Middlemiss, C.S. 1910. A revision of Silurian-Trias sequence in Kashmir. Record Geological Survey of India, 40(3): 206-260.]


Lithology and Thickness

Clayey limestone. This buff-colored formation consists of nodular limestone, bedded limestone, cherty shale, clay shale and calcareous sandstone. 265-300 m.


Lithology Pattern: 
Clayey limestone


Relationships and Distribution

Lower contact

Overlies Tindara Fm.

Upper contact

Underlies Wuyan Fm. [disconformity – no early Carnian recorded]

Regional extent

Kashmir Basin


GeoJSON

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Fossils

The Khreuh Formation encloses Paraceratites trinodosus, Sibirites sp., Isculites sp., Pinacoceras sp., Ptychites sp., Gymnites sankara, G. vasantsena, Grypocera sp. In Pastanah section this formation has yielded Daonella sp., (Verma and Sastry, 1963), Retzia himiaca, Rhynchomella griesbachi and Durgaites dieneri (Kapoor, 1987).


Age 

It possibly represents an Anisian (Sahni and Chhabra, 1981) to Ladinian age (Kapoor, 1987).

Age Span: 

    Beginning stage: 
Anisian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
245.65

    Ending stage: 
Ladinian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
237.00

Depositional setting

Presence of thin-shelled Daonella seems to suggest a foreshore environment of deposition, possibly shallower than that of the Khunamuh Fm (of latest Permian-earliest Triassic).


Depositional pattern:  


Additional Information


Compiler:  

O.N. Bhargava & Birendra Singh