Larji Gr
Period:
Mesoproterozoic
Age Interval:
(ca. 1500-1460 Ma); middle Calymmian
Province:
N.India Lesser Himalaya
Type Locality and Naming
Deoban Basin, [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
Glacial till. The Larji Gr broadly comparises an upward sequence of quartz arenite (Hurla Fm) and dolomitic limestone (Aut Fm).
Lithology Pattern:
Sandy limestone
Relationships and Distribution
Lower contact
Non-conformable with a younger Chandpur Fm (due to thrust fault?) in Larji Window.
Upper contact
Unconformity and no deposition in the Larji Window.
Regional extent
GeoJSON
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Fossils
Age
Mesoproterozoic. Age span estimate 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:
1.0
Ending date (Ma):
1,400.00
Depositional setting
Depositional pattern:
Compiler:
O.N. Bhargava & Birendra Singh.