RT Journal Article
T1 Sedimentos glaciomarinos del Ordovícico terminal en la Zona Cantábrica (NO de España)
T1 Late Ordovician glaciomarine sediments from the Cantabrian Zone (NW Spain)
A1 Bernárdez Rodríguez, Enrique
A1 Gutiérrez Marco, Juan Carlos
A1 Hacar, M.
AB Preliminary studies of some stratigraphic sections spanning the Ordovician-Silurian boundary in the southern CantabrianZone (Iberian Massif, NW Spain) demonstrate the existence of a record of Hirnantian glaciomarine diamictites andshallow-water quartzites in at least three localities, situated in the Bodón nappe. These rocks, evidenced for the first timein the Cantabrian Zone, are probably related to the infilling of a paleorelief, scoured in the Barrios Formation during theLate Ordovician glaciation. The occurrence of an ubiquitous quartzite unit, generally related to the Ordovician-Silurianboundary in most parts of northern Gondwana, is now extended to the outcrops here analyzed. The Hirnantianquarzite probably occurs in additional areas of the Bodón and Correcilla nappes, where its location and significancemight be underestimated, and described as the uppermost part of the Barrios Formation (Middle Cambrian to Arenigian).The same quartzite is probably recognized in the areas with volcanic necks within the Barrios Formation, and also in itsstratotype, in which a latest Ordovician/earliest Silurian quartzite overlies unconformably on Middle Ordovician shales
PB Sociedad Geológica de España
YR 2006
FD 2006
LK http://hdl.handle.net/10272/8633
UL http://hdl.handle.net/10272/8633
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026