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Memoirs of the Society for American Archaeology, 1969
The overwhelming preponderance of artifacts consists of ground stone tools or, more precisely, tools not only shaped for grinding but shaped by grinding. The ratio of ground to chipped stone implements is six to one if hammerstones are included with the latter, and nine to one if hammerstones are disregarded in the calculation.
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The overwhelming preponderance of artifacts consists of ground stone tools or, more precisely, tools not only shaped for grinding but shaped by grinding. The ratio of ground to chipped stone implements is six to one if hammerstones are included with the latter, and nine to one if hammerstones are disregarded in the calculation.
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Lipid biomarkers: molecular tools for illuminating the history of microbial life
Nature Reviews Microbiology, 2021Roger Everett Summons +2 more
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