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This is a list of monoliths organized according to the size of the largest block of stone on the site. A monolith is a large stone which has been used to build a structure or monument, either alone or together with other stones. In this list at least one colossal stone over ten tons has been moved to create the structure or monument. In most cases the ancient civilizations had little, if any, advanced technology that would help the moving of these monoliths. The most notable exception is that of the ancient Greeks and Romans who had cranes and treadwheels to help lift colossal stones (see List of ancient monoliths). Documented in recent times, there is a list of efforts to move colossal stones that used technology that wasn't more advanced than the technology the ancient civilizations used. Most of these weights are based on estimates by published scholars; however, there have been numerous false estimates of many of these stones presented as facts. To help recognize exaggerations, an introductory description shows how to calculate the weight of colossal stones by calculating volume and density. == Calculating the weight of monoliths == In the cases of the smaller monoliths it may be possible to weigh them. However, in most cases the monoliths were too large or they may have been part of an ancient structure so this method could not be used. The weight of a stone can be calculated by multiplying its volume and density. The density of most stones is between two and three tons per cubic meter. Basalt weighs about 2.8 to 3.0 tons per cubic meter; granite averages about 2.75 metric tons per cubic meter; limestone, 2.3 metric tons per cubic meter; sandstone or marble, 2.5 tons per cubic meter.〔(【引用サイトリンク】title=Glossary )〕〔(【引用サイトリンク】title=density & specific gravity of meteorites )〕〔(【引用サイトリンク】title=Eurostone Marble Inc.com )〕 Some softer stones may be lighter than 2 tons per cubic meter, like volcanic tuff, which weighs about 1.9 tons per cubic meter.〔(【引用サイトリンク】title=Basalt Continuous Fiber )〕 Since the density of most of these stones fluctuates it is necessary to know the source for the stone and volume to obtain accurate measurements.〔(【引用サイトリンク】title=Calculating Density )〕〔(【引用サイトリンク】title=Nuts & Bolts of Density )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of largest monoliths in the world」の詳細全文を読む スポンサード リンク
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