Estudio de las microfacies entre Puente-Viesgo y Ontaneda (Santander)

Abstract

A study of the microfacies of Jurassic marine rocks and materials which constitute the passage series between upper Jurassic and lower Cretaceous cropping out in a wide area between Puente-Viesgo and Ontaneda (province Santander) Shows that the latter have been deposited in a marshy en- vironment with the exception of a marine intercalation older thati the sediments of wealdian facies.