Open Daily: 10am - 10pm | Alley door pickup 10am - 7pm 3038 Hennepin Ave Minneapolis, MN
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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Our Ending Conquest

Our Ending Conquest

Kosciejew, Richard John

Paperback

General Psychology

ISBN10: 1546259376
ISBN13: 9781546259374
Publisher: Authorhouse
Published: Sep 21 2018
Pages: 816
Weight: 3.97
Height: 1.62 Width: 8.25 Depth: 11.00
Language: English
Early hominids made stone artifacts either by smashing rocks between a hammer and anvil (known as the bipolar technique) to produce usable pieces or through the regulating and directly controlled process as termed flaking, in which stone chips were fractured away from a larger rock striking it with a hammer of stone or other hard material. Subsequently, during the lingering existence of, say, ten thousand years, the diversity in techniques for producing masonry artifacts-including pecking, grinding, sawing, and boring-became additionally familiar. The best rocks for flaking tended to be hard, fine-grained, or amorphous (having no crystal structure) rocks, including lava, obsidian, ignimbrites, flint, chert, quartz, silicified limestone, quartzite, and indurated shale. Ground-stone tools could be made on a wider range of raw material types, including coarser grained rock such as granite.

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