LT:
Riedulys – bet koks suapvalintas akmuo, didesnis nei 200 mm skersmens. Vieni rieduliai yra nesunkūs, juos galima paridenti rankomis, o kiti dideli ir sunkūs. Rieduliai gali susidaryti upių vagose, t. y., srovė gali atskelti ir nuzulinti didelį akmenį. Taip pat gali būti sunešti ledyno.
EN:
Boulder is a rock fragment with size greater than 20 centimetres in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In common usage, a boulder is too large for a person to move.
