Nota previa sobre la petrología y mineralogía de la calcita flotante de algunas cavidades del levante mallorquín

[eng] It describes the first petrologic and mineralogic result of the study of the floating calcite of the hypogeium lakes of the Majorca's east. The floating calcite are low-magnesium calcite and grows with rhombohedric habit at the interphase water-air forming thin floating plates. There are two growing's generations and the rhombohedrons are disposed with the C axis in radial form around nucleus, generaly of organic and mucilaginous matter. It find associated with organic matter too, process of formation of microsparite. When this calcite submerges, on account of week mechanical perturbations, it suffers intense process of dissolution and corrosion associated with a great development of fungy and bacteria colonies. At the present time it is studying this microflora and the organic mucilaginous matter as soon as its possible genetic and alterative relation with the floating calcite