Soil evolution indices in fluvial terrace chronosequences from centraln Spain (Tagus and Duero fluvial basins)

摘要

Soil development in central Spain was studied through analysis of soil chronosequences from Tagus and Duero river valley terrace systems, evolved under similar Mediterranean climatic conditions throughout the Pleistocene. The most complete soil-terrace sequence, representative for our study, developed in the Tagus valley (Aranjuez-Toledo-Talavera sector). We present soil textural data for argillic horizons developed in Late to Early Pleistocene soils from five valleys. We derive soil development