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Poros stone is a lightweight, soft, marly limestone that was widely used in construction and statues of Ancient Greece. [1] There is no precise definition of the term, although its roots go to antiquity , [ 2 ] when it was used to designate any porous building rock, [ 3 ] regardless of its origin, [ 4 ] mostly in contrast with marble .
Poros (Greek: Πόρος; Modern Greek pronunciation:) is a small Greek island-pair in the southern part of the Saronic Gulf, about 58 km (36 miles; 31 nautical miles) south of the port of Piraeus and separated from the Peloponnese by a 200 m (656 ft) wide sea channel, with the town of Galatas on the mainland across the strait. Its surface area ...
Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%.
The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.
Other innovations include the lining of the dromos with rubble and the use of poros ashlar masonry for the façade, both of which foreshadow architectural conventions common in later tombs. [ 5 ] None of the tholoi at Mycenae were discovered intact, having been looted in antiquity, probably during the Iron Age . [ 6 ]
From January 2008 to December 2012, if you bought shares in companies when Armando Codina joined the board, and sold them when he left, you would have a 128.0 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
Alabaster is a porous stone and can be "dyed" into any colour or shade, a technique used for centuries. [13] For this the stone needs to be fully immersed in various pigmentary solutions and heated to a specific temperature. [13] The technique can be used to disguise alabaster.
From January 2008 to December 2012, if you bought shares in companies when Hugh B. Price joined the board, and sold them when he left, you would have a -16.9 percent return on your investment, compared to a -2.8 percent return from the S&P 500.