tag:blogger.com,1999:blog-1228690739485734684.post293157678833925976..comments2024-03-28T00:46:01.084+00:00Comments on Stonehenge and the Ice Age: On bluestone dimensionsBRIAN JOHNhttp://www.blogger.com/profile/00413447032454568083noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-1228690739485734684.post-16704743198979454422019-05-09T18:42:17.225+01:002019-05-09T18:42:17.225+01:00Frank -- but I have moved stones about 1m x 1m x1m...Frank -- but I have moved stones about 1m x 1m x1m,and they sure as eggs didn't weigh 25 tonnes.........BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-41728989113805219932019-05-09T17:11:33.566+01:002019-05-09T17:11:33.566+01:001m3 or 1,000,000cm3 @ 25gr/cm3 = 25,000,000gr = 25...1m3 or 1,000,000cm3 @ 25gr/cm3 = 25,000,000gr = 25tons, not 2,5tons, no?Franknoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-21919759572242942202011-10-05T22:21:43.114+01:002011-10-05T22:21:43.114+01:00If you know the dimensions of a given stone, and k...If you know the dimensions of a given stone, and know the specific gravity of the rock type, then it's a very simple calculation.<br />Obviously the volume of the given rock, is established from the dimensions e.g. 100cmx100cmx100cm= 1000,000cm3 or 1m3<br /><br />If the quoted average specific gravity of the rock type is 25g/cm3<br /><br />Then the weight is 2.5 tons per m3<br /><br />Quoted figures for the specific gravity of rhyolite are 2.4-2.6 and for dolerite 2.8-3.0 <br /><br />This is only based on a cursory examination of figures for specific gravity quoted in my geological textbooks. <br /><br />The principles however are sound.Alex Geenoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-43811172577155311122011-10-05T21:04:26.588+01:002011-10-05T21:04:26.588+01:00Thanks Alex. That's useful. I have seen very...Thanks Alex. That's useful. I have seen very variable estimates of the weight of the Altar Stone -- anything between 6 tonnes and 9 tonnes. What do think is a reasonable estimate for that one?BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-55085727397445419282011-10-05T20:58:18.174+01:002011-10-05T20:58:18.174+01:00Given the suggested average volume of the blueston...Given the suggested average volume of the bluestones, <br />(1.92 m3), and the average specific gravity of the rock types of 26-30 (quoted in the literature). <br />Then by my calcualtions, the average weight of the Bluestones, should be between 4.9-5.75 metric tons.Alex Geenoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-15853421350577433952011-10-05T15:38:06.302+01:002011-10-05T15:38:06.302+01:00There is an appendix in the Ros Cleal et al book w...There is an appendix in the Ros Cleal et al book with heights of the stones that were standing in 1919.Geo Curhttps://www.blogger.com/profile/03616965043116389325noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-82989761412753031612011-10-05T09:53:25.850+01:002011-10-05T09:53:25.850+01:00"Does anybody have a complete list of all 43 ..."Does anybody have a complete list of all 43 bluestones, and their dimensions? That would be very interesting".<br /><br />Well, I, for one, hope the Security Men who guard Stonehenge on behalf of English heritage do. They really ought to have a full inventory, in case any go missing.SECURICOR SETHnoreply@blogger.com