A Neolithic ground stone.
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 macrocrystalline igneous stones whose coarse structure makes them ideal for grinding other materials, including plants and other stones. In Europe the adoption of ground stone technology is associated closely with the Neolithic. In the Levant ground stones appear in Mesolithic 2 (Natufian).
Some ground stone tools are incidental, caused by use with other tools: manos, for example, are hand stones used in conjunction with metates and other grinding slabs (querns), and develop their ground surfaces through wear. Other ground stone tools include adzes, celts, and axes, which are manufactured using a labor-intensive, time-consuming method of repeated grinding against a harder stone or with sand, often using water as a lubricant. These tools are often made using durable finer-grained materials rather than coarse materials. In the North American arctic, tools made of ground slate were used by the Norton, Dorset, and Thule tool cultures. Common forms of these tools were projectile points and ulus.
See also 
- Moore, D.T., 1983, Petrological aspects of some sharpening stones, touchstones, and milling stones. In The Petrology of Archaeological Artefaces. Clarendon Press, Oxford.
- Fagan, Brian. Ancient North America. Thames & Hudson, London. 2005, p. 191-99.
- Banning, Edward Bruce. The archaeologist's laboratory: the analysis of archaeological data. Kluwer Academic/Plenum Publishers, New York. 2000, p. 151.
Tue, 23 Apr 2013 05:56:45 -0700
The stone fruit campaign started last week in the Spanish Region of Murcia, two weeks earlier than anticipated, making it the earliest open ground stone fruit in Spain. It arrives at the same time as Huelva's greenhouse production. Grupo El Ciruelo has ...
Tyler Morning Telegraph
Sun, 21 Apr 2013 22:07:11 -0700
“Any site after 1,000 A.D. will have stone tools on it,” he said. Stone was fashioned into arrowheads, and the Caddos also made ground stone axes and other tools for use in removing trees and turning up the soil, according to the Texas State Handbook ...
Tue, 07 May 2013 15:37:32 -0700
Gale Reeves, a dairyman who lives 7 miles east of Tonganoxie, was discing a field last week and turned up a stone tomahawk. Mrs. Reeves brought it to The Mirror. In our opinion, this fine ground stone could date back several hundred years to a time ...
Mon, 22 Apr 2013 23:01:43 -0700
“Everyone was highly motivated and we laid the ground stone for a big win early in the first half.” Goalkeeper Manuel Neuer said the squad had wanted to put in an impressive display ahead of Tuesday's European showdown. “We wanted to prepare well for ...
LEX18 Lexington KY News
Thu, 25 Apr 2013 18:06:13 -0700
"Stone-tool fragments, flakes, debetage, sometimes we find ground-stone tools," Dr. Maggard said. Afterwards, they'll map the flags and look for clusters. The team says the survey happening in Southern Clark County around the Goff's corner community ...
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