Top Qs
Timeline
Chat
Perspective
Herald Formation
Geologic formation in Saskatchewan From Wikipedia, the free encyclopedia
Remove ads
The Herald Formation is a stratigraphic unit of Late Ordovician age in the Western Canadian Sedimentary Basin.
It was defined in well Imperial Herald 1-31-1-20W2M by the Lower Paleozoic Names and Correlations Committee of the Saskatchewan Geological Society in 1958.[2]
Remove ads
Lithology
The Herald Formation is composed of dolomitic limestone and dolomite, which can be microcrystalline, argillaceous or microlaminated. [1] In the centre of the basin, it is represented by anhydrite.
Distribution
The Herald Formation reaches a maximum thickness of 38 metres (120 ft) in the Lake Alma area.[1]
Relationship to other units
The Herald Formation is disconformably overlain by the Stony Mountain Formation and conformably overlays the Yeoman Formation.[1]
It can be correlated with the Fort Garry Member of the Red River Formation in Manitoba and in the Williston Basin.
Subdivisions
In south-eastern Saskatchewan, the formation is divided in three units, corresponding to three sedimentation cycles:
References
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads