Assertion: flint's edge | /r/HasProperty | sinuous
Facets:
Source sentences:
text: Direct percussion with a hard hammer Direct percussion with a soft hammer Generates thick pieces, with irregular edges and slightly sharp edges (sometimes, with traces of natural rock crust) Generates thinner and more regular pieces, with much sharper edges Seen in profile, the edges are sinuous because the negatives of the flakes are marked and quite deep