@article{10272/8684,
year = {2005},
url = {http://hdl.handle.net/10272/8684},
abstract = {The Sopelana sea-cliff section exposes, in very good conditions, a continuous marl-limestone alternation
from the Lower Maastrichtian in the deep Basque Arc domain. The 55 rhythms studied represent ~1100
ka and correspond to ~60cm/20ka. The marls are thicker than limestone layers and the Fischer diagram
detects 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 frequency
peaks, which correspond to the precession and eccentricity periods. The high-resolution analysis of four
rhythms (<2cm/sample; 117 analysis, 2.04 m) shows a lack of symmetry and a different behaviour among
them. The weathering surfaces point out an (%, CaCO3 ) enrichment tendency},
publisher = {Sociedad Geológica de España},
title = {Variaciones de espesor y de contenido en CaCO3 en los pares marga-caliza del Maastrichtiense inferior en Sopelana (Arco Vasco)},
title = {Thickness and (%) CaCO3 variations in the couplets marl-limestone of the lower Maastrichtian at the Sopelana
section (Basque Arc)},
author = {Baguer, A. and Martínez López de Sabando, M. and Múgica, J. and Pérez García, J. R. and Unanue, L. and Elorza, Javier and Álvarez Llano, Irantzu},
}