Usur Sandstone Fm
Period:
Tonian
Age Interval:
late Tonian
Province:
Proterozoic S.India Pranhita-Godavari east basin
Type Locality and Naming
Upper formation (3 of 3) of User Gr.
Lithology and Thickness
Sandstone
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Overlies Doli Sandstone Fm
Upper contact
Unconformably overlain by Gondwana Supergroup (which begins with early Permian glacial Talchir Fm)
Regional extent
Approximately coeval with Venkatpur Sandtstone Fm of Sullavai Gr in Pranhita-Godavari west basin
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[79.28,20.07],[79.69,19.75],[81.77,16.74],[81.4,16.64],[79.6,19.08],[79.27,19.75],[79.28,20.07]]]]}}
Fossils
Age
Age Span:
Beginning stage:
Tonian
Fraction up in beginning stage:
0.83
Beginning date (Ma):
767.60
Ending stage:
Tonian
Fraction up in the ending stage:
0.9
Ending date (Ma):
748.00
Depositional setting
Fluvial to shallow coastal
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.