2.6. Mineralogical analyses.
Samples for mineralogical analysis were taken from the middle of the sediments (where numerous carcasses were buried), or from the red layer (see below) in the case of montmorillonite. Sediment samples were investigated by Simultaneous Thermal Analysis (STA) that combines differential scanning calorimetry (DCA) and thermogravimetry (TG). TG/DCA curves were recorded with the STA equipment (NETZSCH STA 449 F3 Jupiter®) at a heating rate of 10°C/min at room atmosphere. Mineral transformations caused by organic decay in kaolinite and clinochlore were described earlier (Naimark et al., 2018a, b). Here we report the transformations in montmorillonite and chamosite in comparison with correspondent controls without nauplii.