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Stepped mounting block in Nantwich, Cheshire. Mounting blocks were usually made from stone or wood and prior to the era of the motor car they were very common. Some have three or more steps leading up to a platform which gave extra height and therefore easier access to the saddle and less chance of falling when dismounting. [6]
Monolith with bull, fox, and crane in low relief at Göbekli Tepe. The density of most stone is between 2 and 3 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, 2.7 metric tons per cubic meter; sandstone or marble, 2.5 tons per cubic meter.
The Dream sculpture is built out of moulded and cast unique concrete shapes, 90 pieces in all contributing to over 14 tiers (54 individual elements for the head, each weighing 9 tonnes (8.9 long tons; 9.9 short tons)). Dolomite was utilised as a concrete aggregate in order to provide the brilliant white finish.
Marleka fairy stone from Stensö in Sweden Iron sulfide concretions, such as the Kansas Pop rocks, consisting of either pyrite and marcasite , are nonmagnetic. [ 79 ] On the other hand, iron sulfide concretions, which either are composed of or contain either pyrrhotite or smythite , will be magnetic to varying degrees. [ 80 ]
A pallet of "8-inch" concrete blocks An interior wall of painted concrete blocks Concrete masonry blocks A building constructed with concrete masonry blocks. A concrete block, also known as a cinder block in North American English, breeze block in British English, concrete masonry unit (CMU), or by various other terms, is a standard-size rectangular block used in building construction.
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