RT Journal Article T1 Las Megabrechas del Membrillar y su relación con el sustrato. Precámbrico-Cámbrico de la Zona Centro-Ibérica T1 Membrillar Megabreccias and their relation with host-rock.Precambrian-Cambrian of the Central-lberian Zone A1 Santamaría Casanovas, J. A1 Pardo Alonso, M. V. AB A detailed map was earned out in the Membrillar locality, Valdelacasa anticline (Central-lberian Zone), and a stratigraphical and sedimentological study of the Membrillar Megabreccias ("Nivel de Fuentes"). Two megabreccias have been distinguished. Crops-out are into the discordant syncline structure and the relation with host-rock is studied, the Membrillar sequence is found out, It is a trace of the IborAllogroup into the Valdelacasa anticline PB Sociedad Geológica de España YR 1994 FD 1994 LK http://hdl.handle.net/10272/13997 UL http://hdl.handle.net/10272/13997 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026