https://www.usgs.gov/publications/upper-triassic-barranca-group-nonmarine-and-shallow-marine-rift-basin-deposits
The 3,000-m-thick Upper Triassic Barranca Group in the Sierra de San Javier in east-central Sonora, Mexico, is composed, in ascending order, of the Arrayanes,...
upper triassicbarranca groupshallow marinerift basin