RT Journal Article
T1 Variaciones de espesor y de contenido en CaCO3 en los pares marga-caliza del Maastrichtiense inferior en Sopelana (Arco Vasco)
T1 Thickness and (%) CaCO3 variations in the couplets marl-limestone of the lower Maastrichtian at the Sopelanasection (Basque Arc)
A1 Baguer, A.
A1 Martínez López de Sabando, M.
A1 Múgica, J.
A1 Pérez García, J. R.
A1 Unanue, L.
A1 Elorza, Javier
A1 Álvarez Llano, Irantzu
AB The Sopelana sea-cliff section exposes, in very good conditions, a continuous marl-limestone alternationfrom the Lower Maastrichtian in the deep Basque Arc domain. The 55 rhythms studied represent ~1100ka and correspond to ~60cm/20ka. The marls are thicker than limestone layers and the Fischer diagramdetects several shifts of high sedimentation and a well-marked minimum. The spectral analysis of the (%)CaCO3 content of the 30 selected rhythms (179 analysis, 18.74 m), confirms the rhythm with two frequencypeaks, which correspond to the precession and eccentricity periods. The high-resolution analysis of fourrhythms (<2cm/sample; 117 analysis, 2.04 m) shows a lack of symmetry and a different behaviour amongthem. The weathering surfaces point out an (%, CaCO3 ) enrichment tendency
PB Sociedad Geológica de España
YR 2005
FD 2005
LK http://hdl.handle.net/10272/8684
UL http://hdl.handle.net/10272/8684
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026