RT Journal Article
T1 Los cantos volcánicos del conglomerado basal de la Fm. Herrería: Evidencias de un Volcanismo Neoproterozoico en la base del Cámbrico
T1 The volcanic clasts from the basal conglomerate of Herrería Fm: Evidences of a Neoproterozoic volcanism in the lower Cambrian
A1 Rubio Ordóñez, Álvaro
A1 Barba, Pedro
A1 Cuesta, Andrés
A1 Gallastegui, G.
A1 Suárez Hernando, Oier
A1 Ugidos, José María
A1 Valladares, María Isabel
AB In the East limb of the Narcea Antiform (Iberian massif) outcrops siliciclastic Cambrian materials with uncomformity disposition over the Neoproterozoic Narcea Slates. The lower Cambrian Herrería Fm. in the Cantabrian Zone includes a conglomeratic unit that it's interpreted like a cohesive debris flow and braided chanels. Most clasts in the considered sections are tuffaceous and ignimbritic volcanic rocks. This papper introduced a new set of data that confirms an acidic composition: mainly rhyolites and minor amounts of trachytes and andesites. Authors interpreted that this volcanic clasts are Neoproterozic in age and with similar characteristics to the acidic volcanic rocks in the ZAOL from the Narcea Antiform. Probably it represents the last volcanic episode of the Cadomian cycle and its different from the Cambro-ordovician alkaline-type volcanism
PB Sociedad Geológica de España
YR 2004
FD 2004
LK http://hdl.handle.net/10272/8943
UL http://hdl.handle.net/10272/8943
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026