basin of volcanic origin的用法和样例：
- Composed chiefly of rock fragments of volcanic origin.
- The islands being wholly of volcanic origin, the soil is necessarily very rich.
- Of volcanic origin.
- The substrate consists of dark rocks and stones of volcanic origin; in many places these are honey combed with holes.
- South Island's most accessible wildlife area and predominantly of volcanic origin, the Otago Peninsula is steep and on the Pacific side very rugged.