Buen Formation

Buen Formation
Stratigraphic range: Cambrian Series 2 (Atdabanian) ~520–513 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Unit of	Sirius Passet
Sub-units	Upper & lower members
Underlies	Hans Tavsen icecap
Overlies	Portfjeld Formation
Thickness	Up to 700 m (2,300 ft)
Lithology
Primary	Mudstone
Other	Sandstone, shale
Location
Coordinates	83°06′N 33°48′W / 83.1°N 33.8°W / 83.1; -33.8
Approximate paleocoordinates	22°06′S 49°00′W / 22.1°S 49.0°W / -22.1; -49.0
Region	Peary Land
Country	Greenland
Extent	Franklinian Basin
Type section
Location	Southern Peary Land
Buen Formation (Greenland)

The Buen Formation is a geologic formation and Lagerstätte in Peary Land, North Greenland. The shale preserves fossils dating back to the Early Cambrian period (Atdabanian in the local timescale, about 520 to 513 Ma).^[1]