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Fig. 12

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Illite crystallinity data from previous studies (Engel et al., 1981; Doublier et al., 2015) based on the crystalline organization of illite analysed via X-ray diffraction converted from the Kübler index into °C (Merriman and Frey, 1999; Zhu et al., 2016). The Figure 14 is based on the data from the red rectangle.
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