Home Multi-Country Search About Admin Login
Cenozoic
Mesozoic
Paleozoic
Neoproterozoic
Mesoproterozoic
Paleoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Syringothyris Limestone Formation
Click to display on map of the Ancient World at:
Syringothyris Limestone Fm base reconstruction

Syringothyris Limestone Fm

Period: 
Carboniferous

Age Interval: 
Tournaisian to Early Visean


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.] Syringothyris is a brachiopod.

Synonyms: Aishmuqam Fm (Srikantia and Bhargava, 1983)


Lithology and Thickness

Limestone and Shale. 600 m thick comprises of shale, siltstone, sandstone and grey limestone. Singh et al., 1982 divided it into Member C (Limestone, shale, siltstone and sandstone intercalations), Member-B (Grey limestone), Member A (limestone + sandstone).


Lithology Pattern: 
Clayey limestone


Relationships and Distribution

Lower contact

Conformably overlies the Wazura Fm in the Liddar Valley. In other places it unconformably overlies directly the Muth Fm quartzite.

Upper contact

With increase in the arenaceous contents towards top, the Aishmuqam Formation passes in to the Ganeshpur Fm (Fenestella Shale Fm).

Regional extent

Kashmir Basin


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[76.46,33.21],[75.58,34.05],[74.97,34.3],[74.17,34.3],[74.09,33.87],[74.39,33.24],[75.71,32.87],[76.46,33.21]]]]}}

Fossils

Conodonts: Clydagnathus gilwernensis, Polygnathus comunis, Bispathodus stabilis, B. aculeatus, Neoprioniodus confluens, Ozarkodina macer, O. sp, Hindeodella subtilis, H. corpulenta, H. sp, Hibbardella cf. milleri, H. ortha, Prioniodina cf. latericrescens, Angulodus sp, Lonchodina sp, and Lingonodina sp (Savage, 1977).

Brachiopod: Syringothyris cuspidate. Bivalves: Modiola liderensis. Algae: ?Eolithoporella sp, Crinoid: Agassizocrinus sp. Coral: Caninophyllum archaiaci, Nemistium edmonsi, Palaeosmilia regia, Lopophyllum interuptum, Dibunophyllum bristolense, Pseudocaninia cf. longisepta. Bryozoa: Fenestella spp,

Plant fossils are Lepidodendropsis, Lepidosigillaria, Archaeosigillaria, ?Cyclostigma, Archaocalamites, Rhacopteris and sphenopterids are reported from the sandstone of the basal and middle parts (Pal and Chaloner, 1979),


Age 

Tournaisian to ?early Visean (Waterhouse et al., 1985).

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
359.30

    Ending stage: 
Visean

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
338.54

Depositional setting

The sandy beds are strongly cross-bedded, varying from hummocky to low-angled type. The Aishmuqam Formation represents several shoaling cycles commencing from subtidal to intertidal zone and locally supratidal, with paralic conditions (?) in basal and middle parts when plants grew in the vicinity of the basin.


Depositional pattern:  


Additional Information


Compiler:  

O.N. Bhargava & Birendra Singh