@article{10272/11425,
year = {1996},
url = {http://hdl.handle.net/10272/11425},
abstract = {Upper Ordovician rocks have been characterized for the first time in the Cantabrian Zone of the Hesperian Massif. The sequence consists of a lower siliciclastic unit of Caradoc-(‘basal Ashgill age developed as an alternation of shales, siltstones and sandstones, overlain by an upper unit of fossiliferous limestones with marly intercalations, of pre-Hirnantian (mainly Cautleyan-Rawtheyan) age. Ashgill fossils are fairly abundant in the limestone unit, and there have been identified brachiopods of the «Nicolella fauna», echinoderms of the «Heliocrinites fauna» and trilobites of the Qvalocephalus biofacies},
publisher = {Sociedad Geológica de España},
title = {Rasgos estratigráficos de la sucesión del Ordovícico Superior en Portilla de Luna (Zona Cantábrica, noroeste de España)},
title = {The Upper Ordovician sequence of Portilla de Luna (Canlabrian Tone, NW Spain)},
author = {Gutiérrez Marco, Juan Carlos and Aramburu, C. and Arbizu, M. and Méndez Bedia, I. and Rábano, Isabel and Villas, E.},
}