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In archaeology, a tool stone is a type of stone that is used to manufacture stone tools, [1] or tools that use stone as raw material. [2]Generally speaking, tools that require a sharp edge are made using cryptocrystalline materials that fracture in an easily controlled conchoidal manner. [1]
A large stone set in the ground or firmly mounted. The stone being worked is hit against this anvil, resulting in large flakes that are further processed into tools. This technique is not well known, though there is evidence of it being used during the Lower Paleolithic. The problem with the anvil stone is that the user handles large stones ...
Epoxy granite, also known as synthetic granite, [1] is a polymer matrix composite and is a mixture of epoxy and granite commonly used as an alternative material for machine tool bases. Epoxy granite is used instead of cast iron and steel for improved vibration damping , longer tool life, and lower assembly cost, and thus better properties for ...
In archaeology, ground stone is a category of stone tool formed by the grinding of a coarse-grained tool stone, either purposely or incidentally. Ground stone tools are usually made of basalt , rhyolite , granite , or other cryptocrystalline and igneous stones whose coarse structure makes them ideal for grinding other materials, including ...
Stone axes from 35,000 years ago are the earliest known use of a stone tool in Australia. Other stone tools varied in type and use among various Aboriginal Australian peoples, dependent on geographical regions and the type and structure of the tools varied among the different cultural and linguistic groups. The locations of the various ...
As tools improved, the material was increasingly finely ground, but only when it became a real powder could we speak of grinding. Thus, the men of the European Upper Paleolithic were already dissociating grinding and milling, as attested by the appearance at this time of the first grinding slabs used with grinders or millstones.
The soft stone is easily carved and is not degraded by heating. The slick surface of soapstone allows the finished object to be easily removed. Welders and fabricators use soapstone as a marker due to its resistance to heat; it remains visible when heat is applied. It has also been used for many years by seamstresses, carpenters, and other ...
Chalcedony was used in tool making as early as 32,000 BP in Central Australia where archaeological studies at sites in the Cleland Hills uncovered flakes from stone brought in from quarries many kilometres away. [13] Pre-contact uses described in the twentieth century included ceremonial stone knives. [14]