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Swiss Journal of Geosciences

Table 1 Field description and mineralogical composition of the Izvir samples

From: K-feldspar rich shales from Jurassic bedded cherts in southeastern Slovenia

 

Quartz

Muscovite/illite

Chlorite

K-fs

Pl

Iz11

     

 First several mm thick laminated muddy intercalation

23

67

6

 

4

Iz12

     

 Second several mm thick muddy intercalation

33

53

14

  

Iz13

     

 Third several mm thick muddy intercalation

26

61

13

  

Iz14

     

 Fourth 2–3 cm muddy intercalation of fine-grained hard brown porous material

3

  

97

 

Iz15

     

 Same layer as Iz14, except that the material is soft

24

26

40

10

 

Iz16

     

 1–5 cm thick bed of sandstone-like chert between vitreous chert layers

90

10

   

Iz17

     

 Several cm thick muddy intercalation from upper part of profile

26

34

16

24

 

Iz18

     

 Chert

100

    

Iz19

     

 Brown coloured muddy intercalation from upper part of profile

41

30

22

7

 

Iz20

     

 Uppermost white coloured muddy intercalation

8

19

19

54

 
  1. A semi-quantitative estimation in % of the bulk sample and clay mineralogical compositions was calculated using data from Schultz (1964), Mišič (1998) and Moore and Reynolds (1997)
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