RT Book, Section T1 Features and Origin of Red Claysin Castafiar Cave: A Touch of Colour A1 Martín Pérez, Andrea A1 Martín García, Rebeca A1 Alonso-Zarza, Ana María A1 Herrero Fernández, María Josefa A2 Andreo, Bartolomé A2 Carrasco, Francisco A2 Durán, Juan José A2 LaMoreaux, James W. AB In Castaiiar Cave (Caceres, Spain), coatings of red clays cover the wallsof the chambers, coexisting with diverse speleothems of aragonite, calcite, huntiteand dolomite. The mineralogy of the clays is mainly illite, chlorite, kaolinite, smectite,quartz and Fe oxides and hydroxides such as goethite. They can be transportedinto the cave by infiltration waters or form by in situ alteration of the host rock: layersof dolomite rich in Fe and magnesite interbedded with greywackes and shales.Present-day hydrological conditions in the cave and conditions during the formationof speleothems have determined that the clays have not been transported by anyflooding or seepage, but mostly staying in situ, and not included into carbonate crystalforms . Thus, most of the well-preserved speleothems are white and not stained,conforming an interesting chromatic contrast with the red clays that represent anadditional attraction in this show cave. PB Springer Verlag SN 978-3-642-12485-3 YR 2010 FD 2010 LK https://hdl.handle.net/20.500.14352/45502 UL https://hdl.handle.net/20.500.14352/45502 LA eng DS Docta Complutense RD 30 abr 2024