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Hasa Gr
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Hasa Gr base reconstruction

Hasa Gr

Period: 
Paleogene

Age Interval: 
Eocene-Paleocene


Province: 
Qatar

Type Locality and Naming

The name Hasa Series was first proposed by N.J. Sander, 1952, and published by him in 1962. Meanwhile, it had been adopted by R.M.S. Owen and S.N. Nasr, 1958, R.C. van Bellen, 1959, and other workers as the Hasa Group.

The name is applied to the complete sequence which comprises the Dammam Fm, Rus Fm and Umm Er Radhuma Fm, all of which have their type sections and are extensively exposed in the Hasa Province of Saudi Arabia. In proposing this name, Sander rejected the earlier name Bahrain Series, whose exact significance was open to doubt.

The name has not been officially adopted in Saudi Arabia (R.W. Powers, 1968).

Synonym:

Reference Section:


Lithology and Thickness


Lithology Pattern: 
Dolomitic limestone


Relationships and Distribution

Lower contact

The chronological list of current rock units indicates Dammam Fm

Upper contact

The chronological list of current rock units indicates Lower Fars Fm

Regional extent


GeoJSON

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Fossils


Age 


Age Span: 

    Beginning stage: 
Lutetian

    Fraction up in beginning stage: 
0.95

    Beginning date (Ma): 
41.38

    Ending stage: 
Lutetian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
41.03

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Jacques LeBlanc (2021), transcribed and translated from Stratigraphic Lexicon Qatar Peninsula by W.Sugden and A.J. Standring, 1972