2026-06-10T15:29:22Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/90292024-04-25T00:05:17Zcom_10259_9025com_10259_5086com_10259_2604com_10259.4_2560col_10259_9026col_10259.4_2561

Estudio de las propiedades magnéticas en las terrazas del río Tajo: implicaciones paleoambientales Bógalo Román, Mª Felicidad Keller, P. Pérez González, Alfredo Gallardo, J. Osete López, María Luisa Rock magnetic properties Palaeoenvironment Pleistocene Soils Soil profiles from 12 terraces of Plio-Pleistocene to Holocene age from the Tajo river in Central Spain were investigated on there rock magnetic properties. Systematic profiles were sampled in O. 1 m intervals from 24 fresh trenches of 2.5m depth. The soil profiles consist of an upper eluvial horizon (A, E), a intermediate illuvial horizon (B), and sometimes a lower horizon (C). Low and high frequency susceptibility (x), saturation IRM (SIRM), and anhysteretic remanent magnetization (ARM) measurements were performed out. The differences between the stable values of horizon B and the high values of the horizons A and E increase with the age of the soils. Comparison of the mean values of the B horizons for each terrace show low X values for the Holocene and the Late Pleistocene, a strong x increase during the Middle Pleistocene, and again low values for the Pliocene and Early Pleistocene. Magnetic parameters of soils show the palaeoenvironmental changes during this period of time. 2024-04-24T10:16:27Z 2024-04-24T10:16:27Z 2024-04-24T10:16:27Z 1996 info:eu-repo/semantics/article 0213-683X http://hdl.handle.net/10259/9029 spa Geogaceta. 1996, n. 20, p. 1062-1065 https://sociedadgeologica.org/publicaciones/geogaceta/geogaceta-20-1996/ info:eu-repo/semantics/openAccess Sociedad Geológica de España