Ara Gr
Period:
Ediacaran, Cambrian
Age Interval:
late Ediacaran – Fortunian, On1
Province:
Oman
Type Locality and Naming
Column: Oman Subsurface. Upward succession of Birba Fm, U Fm, Athel Fm, Al Noor Fm and Dhahaban Fm
Synonym:
Lithology and Thickness
Alternating bands of Limestone and Anhydrite. Upward succession of Birba Fm, U Fm, Athel Fm, Al Noor Fm and Dhahaban Fm Further divided into Ara A6 Carb, Ara A6 Evap, Ara A5 Carb, Ara A5 Evap, Ara A4 Carb, Ara A4 Evap, Ara A3 Carb, Ara A3 Evap, Ara A2 Carb, Ara A2 Evap, Ara A1 Carb, Ara A1 Evap, Ara A0 Carb
Lithology Pattern:
Evaporite
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Nafun Gr
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Karim Fm
Regional extent
GeoJSON
null
Fossils
Age
Late Ediacaran – early Fortunian
Age Span:
Beginning stage:
Ediacaran
Fraction up in beginning stage:
0.9
Beginning date (Ma):
548.42
Ending stage:
Fortunian
Fraction up in the ending stage:
0.5
Ending date (Ma):
533.90
Depositional setting
Depositional pattern:
Additional Information
Compiler:
From Forbes, G.A., Hansen, H.S.M., and Shreurs, J., 2010. Lexicon of Oman: Subsurface Stratigraphy. Gulf Petrolink, 371 pp. (plus enclosures and CD); and Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13. no. 4