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Obsidian (/ ə b ˈ s ɪ d i. ən, ɒ b-/ əb-SID-ee-ən ob-) [5] is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. [6] Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
A macuahuitl ([maːˈkʷawit͡ɬ]) is a weapon, a wooden club with several embedded obsidian blades. The name is derived from the Nahuatl language and means "hand-wood". [2] Its sides are embedded with prismatic blades traditionally made from obsidian, which is capable of producing an edge sharper than high quality steel razor blades.
Prismatic blade. In archaeology, a prismatic blade is a long, narrow, specialized stone flake tool with a sharp edge, like a small razor blade. [1] Prismatic blades are flaked from stone cores through pressure flaking or direct percussion. [2] This process results in a very standardized finished tool and waste assemblage.
PHOTO: Boeing Co. signage outside the company's manufacturing facility in Renton, Wash., Sept. 12, 2024. (M. Scott Brauer/Bloomberg via Getty Images)
Jims Denis, a Haitian immigrant in Springfield, said he moved to the city five years ago and owns three properties in the city, including a photography studio. He said he feels like Haitians in ...
The healthiest seeds include pumpkin seeds, flax seeds, sesame seeds, sunflower seeds, chia seeds and hemp seeds. Healthy crackers may also be made from nutrient-rich nuts or nut flours, such as ...
Multiplayer. Counter-Strike: Global Offensive (CS:GO) is a 2012 multiplayer tactical first-person shooter developed by Valve and Hidden Path Entertainment. It is the fourth game in the Counter-Strike series. Developed for over two years, Global Offensive was released for OS X, PlayStation 3, Windows, and Xbox 360 in August 2012, and for Linux ...
Glatt said, “The study suggests that the ‘weekend warrior’ exercise pattern might offer similar brain health benefits as regular exercise, though the evidence is not conclusive.”. Arciero ...