Home Multi-Country Search About Admin Login
Cenozoic
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Early Paleozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Ratga Formation
Click to display on map of the Ancient World at:
Ratga Fm base reconstruction

Ratga Fm

Period: 
Paleogene

Age Interval: 
Ypresian – Bartonian, Iq3


Province: 
Iraq

Type Locality and Naming

Column: Rutba Uplift (W Iraq), Damlouk and Mugur, Swab Mbrs

Synonym:


Lithology and Thickness

Damlouk and Mugur members: comprises thin-bedded clayey limestone with loaf-like chert nodules and laterally continuous chert beds. 30m thick at type section. Swab member: the lower part of the member is composed of thick to massive white recrystallized limestone with abundant patches of centimetric honey colored calcite. The upper part comprises thick nummulitic limestone, silicified in places, followed by thick-bedded soft fossiliferous limestone with silicified horizon containing phosphatic pellets and shells. 65m thick at Wadi Swab, and 35m thick near Nukhaib.


Lithology Pattern: 
Siliceous limestone


Relationships and Distribution

Lower contact

Regionally, the schematic strat column indicates the next older unit as Akashat Fm

Upper contact

Regionally, the schematic strat column indicates the next younger unit as Kirkuk Gr

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[39.46,32.74],[39.29,32.46],[39.43,32.14],[39.97,32.04],[40.05,32.1],[40.04,32.34],[39.95,32.64],[39.46,32.74]]]]}}

Fossils


Age 

Ypresian – Bartonian

Age Span: 

    Beginning stage: 
Ypresian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
56.00

    Ending stage: 
Bartonian

    Fraction up in the ending stage: 
0.3

    Ending date (Ma):  
40.03

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

From S. Z. Jassim and J. C. Goff, Geology of Iraq, 2006. pg 156, Fig. 13-1: "Stratigraphic correlation of formations of Megasequence AP10."