机译:Ammonoids and their biozonation across the Santonian-Campanian boundary in north-eastern Coahuila, Mexico
Ruprecht Karls Univ Heidelberg;
SNSB Jura Museum;
Univ Autonoma Coahuila;
Upper Cretaceous; Santonian-Campanian boundary; ammonoids; biozonation; Gulf of Mexico; INOCERAMID BIVALVES; AMMONITE FAUNA; PARRAS SHALE; CEPHALOPODS; TEXAS; CHALK;