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A threshold stone or sill stone (German: Schwellenstein) is a rectangularly dressed stone slab that forms part of the entrance of megalithic tombs of the Funnelbeaker culture, normally those with a passage. The red sandstone slab, up to 0.1
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 sandstone slab, buried 2 meters (6.5 feet) below the surface, was dug up in 2018 at the Oc Eo archaeological complex in southern Vietnam.
The individual slabs reached a length of 60 cm to 1m, were 40 cm wide and about 80 cm high. Their weight varied between 800 and 1,000 kg. The tomb consisted of a large main chamber and a small open antechamber. They were separated by a large sandstone slab with a circular hole, similar to the one at Züschen.
Greywacke or graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness (6–7 on Mohs scale), dark color, and poorly sorted angular grains of quartz, feldspar, and small rock fragments or sand-size lithic fragments set in a compact, clay-fine matrix.
This 336-pound sandstone slab has journeyed all the way from Edinburgh to London for King Charles's big day. ... Sicily, Spain, and Ireland, where, at last, Celtic Scots took the coveted rock slab ...
The Thoen Stone is an inscribed sandstone slab that was discovered in the Black Hills of South Dakota by Louis Thoen in 1887. The inscription, dated 1834, was supposedly made by the last survivor of a gold mining party whose members were killed by Native Americans after discovering gold in the area.
At the May 6 coronation, King Charles III's throne will have the Stone of Destiny, also known as the Stone of Scone, placed underneath it.