Comparative study of the transition between very low-grade and low-grade metamorphism in siliciclastic and carbonate sediments; Early Cretaceous, Cameros Basin (northern Spain)

Cameros Basin clastic rocks Europe carbonate rocks Castile Spain Castilla y Leon Spain Cretaceous clay mineralogy illite Mesozoic Iberian Peninsula metamorphism sheet silicates Lower Cretaceous Spain silicates siliciclastics Old Castile Spain sedimentary rocks Southern Europe