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Tittacheri Formation
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Tittacheri Fm base reconstruction

Tittacheri Fm


Period: 
Neogene

Age Interval: 
Miocene-Pliocene (Neogene); Subsurface - southern basins


Province: 
E.India Cauvery Basin

Type Locality and Naming

SUBSURFACE: The type section is located at exploratory well Karaikal-A (depth interval: 432-0 m), in the Nagapattinam subbasin. The hypostratotype is in the well Mandapam-A (depth interval: 40-0 m). It was named after the Tittacheri village by ONGC team steered by Venkatarengan et al. (1993) and issued as Document-VII by KDMIPE, ONGC, Dehradun (1993).

[Figure 1: Type-section Map of Subsurface Formations]


Lithology and Thickness

Clayey sandstone. It consists of unconsolidated gravelly sandstone and earthy clay. Sandstone has alternations of coarse, gritty, poorly-sorted sand grains, clays and claystones. Claystone is gray to dark gray, moderately hard with incipient fissility; occasionally calcareous and micaceous and pyrite and silt are seen. Its thickness varies from 10-700 m. Part of Naraimanam Gr.

[Figure 2: Generalized Stratigraphy and Petroleum System of Cauvery Basin (from dghindia.gov.in)]

[Figure 3: Generalized Stratigraphy of Cauvery Basin (Provided by A. Nallapa Reddy & R. Nagendra)]


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

Unconformable with the Madanam Fm / Shiyali Fm / Vedaranniyam Fm / Niravi Fm depending on sub-basin.

Upper contact

Alluvial or Pleistocene.

Regional extent

Entire Basin: Present in most parts of the basin, but grades into Cuddalore Fm sandstone in the outcrops.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[80.06,11.96],[78.4,8.99],[79.03,9.011],[79.96,9.95],[80.14,10.3],[80.32,11.26],[80.06,11.96]]]]}}

Fossils

Globigerinoides ruber, Sphaeroidinella dehiscens, Pulleniatina obliquiloculata and Ammonia umbonata.


Age 

Miocene-Pliocene.

Age Span: 

    Beginning stage: 
Langhian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
15.99

    Ending stage: 
Piacenzian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
2.58

Depositional setting

Inner neritic.


Depositional pattern:  


Additional Information

This formation grades into Cuddalore Fm in the outcrops.


Compiler:  

A. Nallapa Reddy & R. Nagendra