These stone flakes were later refined into Stone Age tools known as hand-axes — typically teardrop-shaped, with a rounded end for gripping and a sharp end for cutting.
Natural gas is used primarily in the metal, chemical, petroleum refining, stone, clay and glass, pulp and paper, plastic and food-processing industries.
The technique for making tools in the Acheulean industry was a development of the earlier technique, namely striking one stone against another, but the choice of stone was refined.
Stoned, Stephen Woolley's account of the life and death of Rolling Stones co-founder Brian Jones, flips fabulously between horny Stone sensationalism, refined Hackford hackery and suggestive Roeg psychedelia.
More recently, Stones has refined and extended structuration theory to accommodate the complexity and inherent contradictions of the social order in today's globalised, multicultural, networked and technology-dominated society [ 33].
He had things to do: he built stone walls, and refined the engineering of his dam, and took a daily nap, during which the rest of us were to be silent.
Others, made with precious stones set in gold, are refined enough to go from the beach to fancy cocktails.
If a less natural, and more polished look is desired in the garden, use monochrome stones in onyx or white for a brighter, refined appearance.
He then spent several years in Germany, France, England, and Ireland carrying on stratigraphic study and research that enabled him to refine Thomsen's tripartite (Stone, Bronze, and Iron ages) classification of prehistory.
Make that tiny sacrifice and stop being stoned while driving, and at the same time push for the field test to be refined even further. .
