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Morfología y composición de dolomitas: aplicación a su interpretación genética o

1984; Spanish National Research Council; Volume: 40; Issue: 1-2 Linguagem: Inglês

10.3989/egeol.84401-2646

1988-3250

C. Calvo, Jesús Soriano Carrillo,

Paleontology and Stratigraphy of Fossils

Dolostones from the Upper Cretaceous in the southwest of Iberian Range are characterized by two textural types; dolomicrites and dolosparites. Its different origin was discused (Fernandez Calvo, 1983) in base to its geometry, sedimentology and petrography. Analisis by X-ray diffraction show that both dolomites are stoichiometrics. Observed under the scanning electron microscope the crystal morphology indicates a different diagenesis, according to the origin above mentioned.