Particles larger than gravel are called cobbles and boulders. Smaller pieces are called cobbles and pebbles. This category includes pebbles, cobbles and boulders. They can also be created using bricks, block paving, tiles, cobbles, or gravel. Paving stones, brick rosettes or granite cobbles, sometimes even wood. The metavolcanics are found in the form of cobbles within conglomerates and cobble-bearing mudstones. The monumental architecture was constructed with quarried stone and river cobbles. All the sculptures were carved from round sandstone cobbles found on the river banks. Cobblestone is a building material based on cobbles. Her body was sunk into the River Lea using discarded cobbles (granite setts). Shingle beaches are made of particles larger than sand, such as cobbles, or small stones. The hearths were small, and covered with cobbles. Consequently, rocks classify as grains exceeding the size of cobbles on the Wentworth scale. Riffles provide shallower, highly turbulent aquatic habitat of primarily cobbles. A rock made predominantly of cobbles is termed a conglomerate.