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Use "bowlders" in a sentence
"Such rounded cores, known as bowlders of weathering, are often left to strew the surface."
"a rocky section, with a rough cavern on their right -- that is, the bowlders and rocks were jumbled together in such a fashion that there was some resemblance to a cave."
"Winterborne had abstractedly taken the poker, and with a wrinkled forehead was ploughing abroad the wood-embers on the broad hearth, till it was like a vast scorching Sahara, with red-hot bowlders lying about everywhere."