Talk:Oamaru stone

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Breakwaters and broken stone

Latest comment: 6 years ago1 comment1 person in discussion

Block-setting crane#Moa describes the 1872 construction of a breakwater at Oamaru, and two civil-engineering inventions: a new form of block-setting crane with which to build it, and the invention of the powered concrete mixer in order to cast concrete blocks to use. This is put down to a shortage of useful high quality stone in the area: that which is available is either too small (too broken or faulted in the quarry) or not resistant enough for a breakwater in a rough sea. Is anyone more familiar? Andy Dingley (talk) 13:24, 27 January 2020 (UTC)Reply

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Talk:Oamaru stone

Breakwaters and broken stone