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Obsidian was valued in Stone Age cultures because, like flint, it could be fractured to produce sharp blades or arrowheads in a process called knapping. Like all glass and some other naturally occurring rocks, obsidian breaks with a characteristic conchoidal fracture. It was also polished to create early mirrors.
Markus Persson founded Mojang Studios in 2009.. Mojang Studios was founded by Markus Persson, a Swedish independent video game designer and programmer, in 2009. [3] [4] He had gained interest in video games at an early age, playing The Bard's Tale and several pirated games on his father's Commodore 128 home computer, and learned to programme at age eight with help from his sister.
A 2013 IGN article and video listed 2b2t's spawn area as one of the six best things in Minecraft, describing the server as the "end boss" of Minecraft servers, a celebration of destruction and indifference. The article noted 2b2t's propensity towards griefing, the use of hacked clients, and player-built obscenities; and stated that players with ...
A conchoidal fracture is a break or fracture of a brittle material that does not follow any natural planes of separation. Mindat.org defines conchoidal fracture as follows: "a fracture with smooth, curved surfaces, typically slightly concave, showing concentric undulations resembling the lines of growth of a shell". [1]
Obsidian Entertainment, Inc. is an American video game developer based in Irvine, California and part of Xbox Game Studios. It was founded in June 2003, shortly before the closure of Black Isle Studios , by ex-Black Isle employees Feargus Urquhart , Chris Avellone , Chris Parker, Darren Monahan , and Chris Jones.
The lavas of different volcanoes, when cooled and hardened, differ much in their appearance and composition. If a rhyolite lava-stream cools quickly, it can quickly freeze into a black glassy substance called obsidian. When filled with bubbles of gas, the same lava may form the spongy appearing pumice. Allowed to cool slowly, it forms a light ...
Obsidian hydration dating (OHD) is a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian.. Obsidian is a volcanic glass that was used by prehistoric people as a raw material in the manufacture of stone tools such as projectile points, knives, or other cutting tools through knapping, or breaking off pieces in a controlled manner, such as ...
Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism.