Group Sub-group Figure references Distinguishing characteristics Illustrated by specimen
       
1 1.1 Fig. 2 Abundant limestone and quartz, with a large difference in proportions 33
  1.2 Fig. 3 Lower limestone content, abundant quartz with a small difference in proportions 74
  2.1 Fig. 4 Low quartz and limestone content, with limestone more abundant than quartz 60
  2.2 Fig. 5 Low quartz and limestone content, with the amount of limestone similar to that of quartz 166
  2.3 Fig. 6 Low quartz and limestone content, with quartz more abundant than limestone 76
 
2 1.1 Fig. 7 Low quartz content 146
  1.2 Fig. 8 Medium quartz content 165
  2.1 Fig. 9 High quartz content 80
  2.2 Fig. 10 Sub-rounded to well rounded quartz 163
 
3 1.1 Fig. 11 Abundant volcanic rock fragments (>17%) 62
  1.2 Fig. 12 Low content of volcanic rock fragments (c. 12%) 63
 
4 1.1 (High serpentine) Fig. 13 High ophiolite content, with high serpentine content 187
  1.1 (High radiolarian) Fig. 14 High ophiolite content, with high radiolarian chert content 52
  2.1 Fig. 15 High ophiolite content, with abundant replacement chert and low radiolarian chert content 40
  2.2 Fig. 16 Low ophiolite content, with low replacement chert content 161
 
5 1.1 Fig. 17 High limestone content, with low microfossil content 42
  1.2 Fig. 18 Lower limestone content, with low microfossil content 160
  2.1 Fig. 19 High limestone content, with high microfossil content 83
  2.2 Fig. 20 High limestone content, with high microfossil content: distinguished visually by 'Beige inclusions' 149

Table 1. Summary of the petrographic Groups and Sub-groups, with features distinguishing between them in thin section (based on point-count data) and, where appropriate, in solid section