Hornitos Formation

Hornitos Formation
Stratigraphic range: Late Cretaceous, Campanian–Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Lithology
Primary	Limestone, sandstone, conglomerate
Other	Marl, tuff
Location
Coordinates	28°00′S 70°18′W / 28.0°S 70.3°W / -28.0; -70.3
Approximate paleocoordinates	30°36′S 54°30′W / 30.6°S 54.5°W / -30.6; -54.5
Region	Atacama
Country	Chile
Extent	Algarrobal Basin
Hornitos Formation (Chile)

The Hornitos Formation is a Campanian geologic formation of the Algarrobal Basin in the Atacama Region of northern Chile. The formation comprises limestones, sandstones, conglomerates, marls and tuff. Dinosaur remains are among the fossils that have been recovered from the formation, including the sauropod Arackar licanantay.^[1]