Chanda Limestone Fm
Period:
Ectasian
Age Interval:
Late Ectasian
Province:
Proterozoic S.India Pranhita-Godavari west basin
Lithology and Thickness
Limestone (deep-water carbonate platform). Bedded lithographic limestone with intervals of siliceous limestone and chert with local Mn-deposits, and a very distinctive marker horizon of black limestone. Debris flow deposits of lime pebble conglomerate are also common.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Overlies the Pranhita Sandstone Fm
Upper contact
Overlain by Satnala Shale Fm
Regional extent
Approximately coeval with Chalamala Sandstone Fm (shallow-shelf) in Pranhita-Godavari east basin
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[79.21,19.16],[79.59,19.1],[81.35,16.61],[81,16.43],[79.21,19.16]]]]}}
Fossils
Age
Age Span:
Beginning stage:
Ectasian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
1,300.00
Ending stage:
Ectasian
Fraction up in the ending stage:
1.0
Ending date (Ma):
1,200.00
Depositional setting
Deep-water carbonate platform with oxic to anoxic conditions.
Depositional pattern:
Additional Information
Compiler:
From: Saha D. (Dilip), Patranabis-Deb, S., and Colllins, A.S. (2016) Proterozoic stratigraphy of southern Indian cratons and global context. In: Stratigraphy & Timescales, 1: 1-59.