Sillakkudi Formation
Geologic formation in Tamil Nadu, India
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The Sillakkudi Formation is a Late Cretaceous (Campanian) geological formation located in Tamil Nadu, India it forms part of the Ariyalur Group. It dates to the Campanian of the Late Cretaceous.[1][2]
| Sillakkudi formation | |
|---|---|
| Stratigraphic range: Early Campanian ~ | |
| Type | Geological formation |
| Unit of | Ariyalur Group |
| Underlies | Kallakurichi Formation |
| Overlies | Anaipadi Formation |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Location | Sillakkudi |
| Region | Tamil Nadu |
| Country | India |
| Type section | |
| Coordinates | 11°05′50″N 79°02′15″E |
  Sillakkudi Formation (India)  Sillakkudi Formation (Tamil Nadu) | |
Description
The formation was deposited in a Shallow Marine setting as it shows signs of a mobile deposition of substrate. The diversity of the Mollusc fauna of the formation also indicates a shallow marine deposition.[3]
Fossil content
Lamellibranchs and echinoid fragments have been reported from the Sillakkudi formation.[3]
| Molluscs from the Sillakkurdi formation | ||||
|---|---|---|---|---|
| Genus | Species | Material | Notes | Member |
| Inoceramus[3] | I. sp. | |||
| Karapadites[3] | K. karapadense | |||
| Foraminiferas from the Sillakkudi formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | |
| Globotruncana | G. arca[3] | ||||
| G. ventricosa[3] | |||||
| G. elevata[3] | |||||