“…12;Tardy, 1977;Servais et al, 1982Servais et al, , 1986Araujo-Mendieta and Arenas-Partida, 1986;Sedlock et al, 1993). West of the Aldama peninsula and Coahuila block, the Mexican geosyncline accumulated shallow-marine clastic and volcaniclastic sediments derived from the arc, whereas the Chihuahua trough was a restricted marine basin, perhaps in part evaporitic (Cordoba, 1969;Cordoba et al, 1970Cordoba et al, , 1980de Cserna, 1970de Cserna, , 1979de Cserna, , 1989Rangin and Cordoba, 1976;Gonzaléz-García, 1976;González, 1989;Tardy, 1977;Rangin, 1978Rangin, , 1979Gastil, 1983;Gastil et al, 1986;Dickinson, 1981;Tóvar Rodríguez, 1981;Roldan-Quintana, 1982;Servais et al, 1982Servais et al, , 1986Brown and Handschy, 1983;Cuévas-Pérez, 1983;Cuévas-Pérez et al, 1985;Marquez-Castaneda, 1984, in Moran-Zenteno, 1984Cantú-Chapa et al, 1985;Campa-Uranga, 1985;Araujo-Mendieta and Arenas-Partida, 1986;Moran-Zenteno, 1994).…”