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A geologist's hammer, also known as rock hammer, rock pick, geological pick, or geo pick, is a specialized hammer used for splitting and breaking rocks. In field geology, it is employed to expose fresh rock surfaces, as weathered surfaces may obscure accurate analysis of a rock's composition, bedding orientation, mineralogy, history, and strength.
The group, carrying buckets, shovels and rock hammers, descended into a mother lode of petrified wood and common opal. White reminded the enthusiasts to not undercut tree roots while they dug and ...
The London Hammer (also known as the "London Artifact") is a hammer made of iron and wood that was found in London, Texas in 1936. Part of the hammer is embedded in a limey rock concretion , leading to it being regarded by some as an anomalous artifact .
The use of simple hammers dates to around 3.3 million years ago according to the 2012 find made by Sonia Harmand and Jason Lewis of Stony Brook University, who while excavating a site near Kenya's Lake Turkana discovered a very large deposit of various shaped stones including those used to strike wood, bone, or other stones to break them apart and shape them.
The soft hammer has a lower yield than the rock, that would make a layman think that it is impossible to carve flint or quartzite with a piece of wood or antler. However, its elastic limit is much higher, which makes it bear more tension and it is the rock that breaks, instead of the hammer. This does not happen, however, with the bone.
This page was last edited on 10 October 2006, at 20:18 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
A breaker is a powerful percussion hammer fitted to an excavator for demolishing hard (rock or concrete) structures. It is powered by an auxiliary hydraulic system from the excavator, which is fitted with a foot-operated valve for this purpose.
1925 advertisement for Plumb-brand hammers. In 1869, Fayette R. Plumb entered a partnership with Jonathan Yerkes, an established hammer manufacturer operating in the Frankford neighborhood of Philadelphia. Shortly thereafter, a new facility was built in the Bridesburg neighborhood of that city, operating as Yerkes & Plumb.
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