Chalamala Sandstone Fm
Period:
Ectasian
Age Interval:
middle Ectasian
Province:
Proterozoic S.India Pranhita-Godavari east basin
Lithology and Thickness
Sandstone. Medium- to fine-grained subarkosic sandstone with common ripple laminations, cross-stratification, wrinkle marks and current crescents.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Underlain by Tippapuram Shale Fm
Upper contact
Unconformable below the Nambi Breccia Fm of lowermost Usur Gr
Regional extent
Approximately coeval with upper Chanda Limestone Fm and Sat Nala Shale Fm of Pengnaga Gr in Pranhita-Godavari west basin
GeoJSON
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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:
0.75
Ending date (Ma):
1,250.00
Depositional setting
Storm-and-tide dominated shallow shelf
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.