Hurla Fm
Period:
Mesoproterozoic
Province:
N.India Lesser Himalaya
Type Locality and Naming
Himachal Pradesh-Uttarakhand, Deoban Basin, named after Hurla stream. [Original Publication: Sharma, V.P. (1977). Geology of the Kulu-Rampur Belt, Himachal Pradesh. Mem. Geol. Surv. India, In: Stratigraphy and Structure of parts of Simla Himalaya. Mem. Geol. Surv. India, 106, 235-407.]
[Figure: Geological map of Larji Gr (Aut Fm and Hurla Fm) (provided by O.N. Bhargava & Birendra Singh)]
Lithology and Thickness
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Non-conformable with Chandpur Fm (due to thrust fault?)
Upper contact
Conformable with Aut Fm
Regional extent
Exclusively within the Larji Window.
GeoJSON
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Fossils
Unfossiliferous
Age
1500-1480 Ma. Age span estimates partly taken from Miller, C., Klötzli, U., Frank, W., Thoni, M., Grasemann, B. 2000. Proterozoic crustal evolution in the N.W. Himalaya (India) as recorded by circa 1.80 Ga mafic and 1.84 Ga granitic magmatism. Precambrian Research, 103, 191-206.
Age Span:
Beginning stage:
Calymmian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
1,500.00
Ending stage:
Calymmian
Fraction up in the ending stage:
0.6
Ending date (Ma):
1,480.00
Depositional setting
Shallow marine, sandy tidal flats.
Depositional pattern:
Additional Information
Correlated with the Khira Fm (Simla region) and Jainti Fm
Compiler:
O.N. Bhargava & Birendra Singh.