Resumen de Ciclos climáticos de alta frecuencia en los espeleotemas de las Cuevas de Ortigosa de Cameros (La Rioja)
A. Muñoz, Carlos Sancho Marcén, José Luis Peña Monné, B. Sánchez Valverde, Blas Lorenzo Valero Garcés, Juan José Durán Valsero, Dominique Genty
A chronological and statistical study of the internal laminated structure of speleothems from the Ortigosa de Cameros Caves (Northern Spain) provides a paleoclimatic sequence characterized by high-frequency cycles during Holocene times. The chronology is constrained by U/Th (7.6 ± 0.7ka) and radiocarbon dates (3400 ± 600, 1200 ± 400 and 700 ± 350 14C yr B.P). Based on the statistical study of stalagmite laminae thickness and considering a seasonal growth pattern in the development of the internal lamination, different pluri-annual cycles (14.5-13.3, 9.7, 8.0-7.8, 6.1-5.6and 2.4 years) are identified and their possible correlation with high-frequency climatic cycles is investigated.
