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 |