Sundays River Formation

Sundays River Formation
Stratigraphic range: Valanginian-Hauterivian ~139–131 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Sandstone layer overlying siltstone/mudstone
Type	Geological formation
Unit of	Uitenhage Group
Underlies	Algoa Group
Overlies	Kirkwood Formation
Thickness	Up to 2,000 m (6,600 ft)
Lithology
Primary	Sandstone, claystone
Other	Siltstone, mudstone
Location
Coordinates	33°36′S 25°36′E / 33.6°S 25.6°E / -33.6; 25.6
Approximate paleocoordinates	45°06′S 11°30′W / 45.1°S 11.5°W / -45.1; -11.5
Region	Eastern & Western Cape
Country	South Africa
Type section
Named for	Sundays River
Map showing extent of the Sundays River Formation in the Algoa Basin

The Sundays River Formation is a geological formation found in the Eastern and Western Cape provinces in South Africa. It is the second youngest of the four formations found within the Uitenhage Group of the Algoa Basin, its type locality, and the only location where outcrops have been located. The Sundays River has been measured at a maximum thickness of 2,000 metres (6,600 ft).^[1]