Table 2. Coarse fragments

Shape and kind of fragments Up to 7.5 cm (3 inches) in diameter 7.5-25 cm in diameter Over 25 cm (10 inches) in diameter
[1] The individual classes are not always differentiating characteristics of mapping units.
[2] Bouldery is sometimes used where stones are larger than 24 inches.
[3] Formerly called "stony."
Rounded and subrounded fragments
All kinds of rock
Gravelly [1] Cobbly Stony (or bouldery)[2]
Irregularly shaped angular fragments Chert Cherty Coarse cherty Stony
Irregularly shaped angular fragments Other than chert Angular gravelly Angular cobbly [3] Stony

Shape and kind of fragments Up to 15 cm (6 inches) in length 15-38 cm (6-15 inches) in length Over 38 cm (15 inches) in length
Thin flat fragments
Thin flat sandstone,limestone,schist
Channery Flaggy Stony
Thin flat fragments
Slate
Slaty Flaggy Stony
Thin flat fragments
Shale
Shaly Flaggy Stony