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TeachMeFinance.com - explain boulder boulder The term 'boulder' as it applies to the area of reclamation can be defined as ' A rock fragment, usually rounded by weathering or abrasion, with an average dimension of 12 inches or more: will not pass a 12-inch screen. A particle of rock that will not pass a 12-inch (300-mm) square opening. A rock which is too heavy to be lifted readily by hand'.
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