RT Journal Article T1 La geología de la Cuenca de Madrid en la obra de Casiano de Prado (1797-1866) A1 Ordóñez Delgado, Salvador A1 García del Cura, María Ángeles AB After Casiano de Prado the infill of Madrid Basin consists of: the "diluvium" or quaternary deposits which surface and thickness was overestimated in his work, and "fresh water tertiary deposits". In the tertiary deposits he distinguished three units: A calcareous upper unit (Colmenar Stone), a gyspsiferous middle unit (Gypsum of Colmenar), and a lower unit that consists of sandstones and conglomerates which outcroppinng in NE and W of the basin, concordant with cretaceous deposits. In his work has been described convoluted and disturbed evaporite deposits, as well as dolostones and siliceous rocks and sepiolite. PB Sociedad Geológica de España SN 0213-683X YR 1997 FD 1997 LK https://hdl.handle.net/20.500.14352/120897 UL https://hdl.handle.net/20.500.14352/120897 LA spa NO Ordóñez Delgado, S. y García del Cura, M. A. (1997) «La geología de la Cuenca de Madrid en la obra de Casiano de Prado ( 1797-1866)», Geogaceta, 23, pp. 107-109. DS Docta Complutense RD 1 ene 2026