GRAPTOLITE-TRILOBITE BIOSTRATIGRAPHY IN THE SANTA VICTORIA AREA, NORTHWESTERN ARGENTINA. A KEY FOR REGIONAL AND WORLDWIDE CORRELATION OF THE LOWER ORDOVICIAN (TREMADOCIAN–FLOIAN). AMGH [Internet]. 2015 Jun. 17 [cited 2025 Sep. 29];52(5):535–557. Available from: https://ameghiniana.org.ar/index.php/ameghiniana/article/view/2905