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Fenestella Shale Formation
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Fenestella Shale Fm base reconstruction

Fenestella Shale Fm

Period: 
Carboniferous

Age Interval: 
Early Carboniferous–Lower Middle Carboniferous (Late Visean to late Bashkirian


Province: 
NW Himalaya Kashmir Basin

Type Locality and Naming

The type location is in Dahwot-Naigpur section Liddar Valley. [Original Publication: Middlemiss, C.S. 1910. A revision of Silurian-Trias sequence in Kashmir. Record Geological Survey of India, 40(3): 206-260.] Fenestella is a genus of extinct bryozoans.

Synonyms: Middlemiss, 1910 “Fenestella series” Kumar et al., 1980 “Fenestella Shale Formation (Ganeshpura Formation, Srikantia and Bhargava, 1983)


Lithology and Thickness

Claystone to sandstone. Bryozoan-rich (Fenestella) shale, siltstone, quartz-arenite successions. 850 m thick


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

Conformably overlies the Syringothyris Limestone Fm.

Upper contact

Conformably overlain by Pindabol Fm.

Regional extent

Kashmir Basin


GeoJSON

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Fossils

Bryozoa: Fenestella plebei, F. aff. fossula, F. aff. internata, Protoretepora ampla. Brachiopod: Dielasma sp, Langella sp, Schuchertella sp, ?Werrai dorosoplana, ?W. conjectura, Streptorhynchcus humilis, Pustula sp, Chonetes planatus, Globosochonetes tibetensis, Tornquistia sp, ?Avonia percostata, ?Tomilia sp, ?Flexiaria stiensisp, ?Setigerites sp, Dowahatania dohatensis, Paruncinella middlemissi, Adminiculoria middlemissi, Balakhonia sp, Papilionlinus eishmukami, Camarotoechia sp, Goniophoria sp, Rotaia dowhatensis, Hemiplethorhynchnus kashmirensis, Voiseyella sp, Ambocoelia sp, Reticularia, Eomartinopsis sp, Syringothyris lydekkeri, ?Alispirifer sp, Spiriferellina sp, Productus cora, P. sabriculus, P. undatus, P. spitiensis, Sprifer lydekkeri, S. triangularis, S. Varuna. Bivalve: Aviculopecten middlemissi, ?Ehteripecten sp, ?Myalina sp, Modiola, , Pinna sp,


Age 

Early Carboniferous – Lower Middle Carboniferous (Late Visean to late Bashkirian. Waterhouse et al., (1985) suggest Viséan-Serpukhovian age to the Fenestella Shale (Ganeshpur Fm).

Age Span: 

    Beginning stage: 
Visean

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
338.54

    Ending stage: 
Bashkirian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
315.15

Depositional setting

Sandstone shows low-angled cross-bedding, festoon type cross-bedding and locally parallel bedding. The Ganeshpur Formation constitutes combination of several shoaling cycles commencing from mid-shelf and culminating in upper shore face to a deposit of beach-lagoon barrier bar complex.


Depositional pattern:  


Additional Information


Compiler:  

O.N. Bhargava & Birendra Singh