A rounded rock on a beach, with diameter ranging from about 75 to 250mm - see also boulder, gravel, shingle.
a rock particle 64 to 256mm in diameter.
A rock fragment with a diameter between 6.4 cm (about the size of a tennis ball) and 25.67 cm (about the size of a volleyball). Cobbles are larger than pebbles but smaller than boulders.
a rock or rock fragment with a grain size 2.5 to 10 inch (64 to 254 mm).
particles ranging in size from 64 to 256 mm
A rock fragment, usually rounded or semi-rounded, with a minimum dimension of 3 to 12 inches.
rectangular paving stone with curved top; once used to make roads
A rock whose diameter is in the range of 64 to 250 mm.
Sediment particle, or rock, that is between 64-256 mm in diameter
a mass of rock greater than 64 millimeters in diameter, but less than 256 millimeters in diameter. Cobblestones are larger than a pebble and smaller than a boulder.
naturally rounded stone, 77-256 mm (3-10 inches) in diameter, or a size between that of a tennis ball and that of a volleyball.
Loose particles of rock or mineral (sediment) that range in size from 64 - 256 millimeters in diameter. Cobbles are a size of gravel larger than pebbles, but smaller than boulders. more details...
Stones larger than gravel, ranging from 1/2 inches to 12 inches in diameter. Example: 1/2 inch Cobble
Cobble - A rock fragment from 2.5 to 10 inches in diameter, somewhat rounded by abrasion during transport.
Substrate particles that are smaller than boulders and are generally 64-256 mm in diameter. Can be further classified as small and large cobble. Commonly used by salmon in the construction of a redd.
A stone that has been rounded by water, either by flowing water or wave action. Cobbles range in diameter from 7.5 to 25 cm. [ W. cob, lump.
Rounded rocks ranging in diameter from approximately 64 to 256 mm
rock fragment rounded under water action (sea, river), size ranging from 2 mm to 25 cm. Main components of conglomerates.
Rock smaller than a boulder and larger than gravel; arbitrarily 0.5 to 12 kg, or 75 to 200 mm in diameter.
firm, naturally-rounded rocks used in building or paving. In Oregon, river-washed rocks are often used as cobbles in constructing porch pillars, fireplaces, and foundations, especially in houses in the Bungalow style.
substrate particles with a diameter of 64 mm to 256 mm
