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There are many different methods of shaping stone into useful tools. Early knappers could have used simple hammers made of wood or antler to shape stone tools. The factors that contribute to the knapping results are varied, but the EPA (exterior platform angle) indeed influences many attributes, such as length, thickness and termination of flakes.
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Jet is a product of decomposition of wood from millions of years ago, commonly the wood of trees of the family Araucariaceae. [5] Jet is found in two forms, hard and soft. [5] Hard jet is the result of carbon compression and salt water; soft jet may be the result of carbon compression and fresh water. [5]
Core Keeper is a top-down sandbox game based around survival and crafting mechanics similar to games such as Minecraft and Terraria. [3] It can be played single-player or cooperatively with up to eight players. [3] [4] Players also have the ability to host a server which anyone can join at any time up to a maximum of eight players.
Varieties of stone, rock, gravel or earth, used primarily by architects or interior designers as a building material in the construction of buildings and structures Wikimedia Commons has media related to Stone .
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Massive precut stone is also known as "prefabricated", or "pre-sized" stone is a modern method of building with load-bearing stone. [22] Precut stone is a DFMA construction method that uses large machine-cut stone blocks with precisely defined dimensions to rapidly assemble buildings in which stone is used as a major or the primary load-bearing ...
The "black" in "blacksmith" refers to the black firescale [citation needed], a layer of oxides that forms on the surface of the metal during heating.The origin of smith is the Old English word smið meaning "blacksmith", originating from the Proto-Germanic *smiþaz meaning "skilled worker".