01. Rock type
02. Classification
03. Color
04. Hardness / Induration
05. Grain size
06. Grain shape
07. Sorting
08. Composition
09. Matrix / Cementation
10. Accessories / Inclusions
11. Visual Porosity
12. Oil Shows

rare rr 稀少 <1%
trace tr 微量 1~3%
occasional occ 偶爾的 3~10%
minor mnr 較少的 10~25%
common com 普通的 25~50%
abundant abnt 豐富的 50~75%
predominant pred 主要的 >75%

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