Calcretes from a palaeosinkhole in jurassic palaeokarst (subbetic, southern Spain)

@inproceedings{Cisneros1993CalcretesFA,
  title={Calcretes from a palaeosinkhole in jurassic palaeokarst (subbetic, southern Spain)},
  author={Concepci{\'o}n Jim{\'e}nez de Cisneros and Jos{\'e} Miguel Rodr{\'i}guez Molina and Luis Miguel Loso Nieto and P. A. Ruiz-ortiz and Juan Antonio Vera},
  year={1993}
}
Abstract Calcretes have been recognized in the bottom of a palaeokarstic sinkhole etched into Early Jurassic carbonates from the Subbetic (Southern Spain). These are 3 to 10 cm thick and they show an internal structure in which three units can be distinguished. The lower unit is composed of alternate irregular bands of unfossiliferous micrite and sparry calcite. In the micrite, several features point out the activity of endolithic microorganisms as fungi and bacteria. The middle unit, which has… CONTINUE READING