Yacoraite Formation

Yacoraite Formation
Stratigraphic range: Maastrichtian-Danian
TypeGeological formation
Unit ofSalta Group
Sub-unitsAmblayo, Güemes, Alemanía & Juramento Members
UnderliesMealla, Olmedo & Tunal Formations
OverliesLecho Formation
Lithology
PrimarySandstone
OtherLimestone
Location
Coordinates23°30′S 65°24′W / 23.5°S 65.4°W / -23.5; -65.4
Approximate paleocoordinates26°06′S 51°54′W / 26.1°S 51.9°W / -26.1; -51.9
RegionJujuy & Salta Provinces
Country Argentina
ExtentSalta Basin
Type section
Named forYacoraite village, Tilcara Department
Yacoraite Formation is located in Argentina
Yacoraite Formation
Yacoraite Formation (Argentina)

The Yacoraite Formation is a largely Mesozoic geologic formation. The deposits of this formation mainly date from the Maastrichtian of the Upper Cretaceous, but the Cretaceous–Paleogene boundary (K–T boundary) runs right through this formation near its top, and the uppermost parts are consequently from the Danian (Lower Paleocene). It was probably deposited around the intertidal zone, as the sedimentary rocks of this formation alternate according to sea level changes between deposits of muddy beaches and of shallow ocean.[1]

  1. ^ Marquillas et al. (2003)