(Q35794)
Statements
perhaps surrounding a buried igneous intrusion into Cretaceous limestones (Aurora formation) that may
of its environment and being situated in receptive Cretaceous sedimentary rocks, the Aurora formation,
discounted. Studies to date confirm that the Niko Estrella area Cretaceous limestone sequence contains porous units
is 30 to 60 meters thick. These formations are of Cretaceous age. STRUCTURE Folds The limestones which
and Walter, T., 1971, Stratigraphic Nomenclature of Cretaceous Rocks in Northeastern Chihuahua: in The
1986, Depositional Environment and Petrology of the Cretaceous Carbonates Hosting Pb-Zn-Ag Mineralization