Mattur Fm
Period:
Cretaceous
Age Interval:
late Campanian-earliest Maastrichtian (outcrop at Vridhachalam area)
Province:
E.India Cauvery Basin
Type Locality and Naming
VRIDHACHALAM OUTCROP: Named after Mattur village, Vridhachalam area, TamilNadu. Type locality = Only in water wells at Mattur village.
[Figure 1: Geologic map of Vridhachalam area]
Lithology and Thickness
Sandstone. Un-cemented medium- to coarse-grained sandstone with interlayers and lenses of cemented grainstone (calcarenite) and thin seams of coquina limestone (Sundaram et al., 2001).
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Conformable with Patti Fm.
Upper contact
Conformable with Aladi Fm.
Regional extent
not available.
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[78.42,10.98],[78.39,9.75],[78.61,9.7],[79.29,10.96],[78.42,10.98]]]]}}
Fossils
Foraminifer Globotruncana tricarinata Zone and macrofossils
Age
late Campanian- earliest Maastrichtian
Age Span:
Beginning stage:
Campanian
Fraction up in beginning stage:
0.8
Beginning date (Ma):
74.47
Ending stage:
Maastrichtian
Fraction up in the ending stage:
0.5
Ending date (Ma):
69.11
Depositional setting
Shallow shelf (Sundaram et al., 2001).
Depositional pattern:
Additional Information
Compiler:
A. Nallapa Reddy & R. Nagendra