For building work a hammer or pick is used to split chert nodules supported on the lap. Often the chert nodule will be split in half to create two cherts with a flat circular face for use in walls constructed of lime. More sophisticated knapping is employed to produce near-perfect cubes which are used as bricks.

Tools

There are many different methods of shaping stone into useful tools. One prominent knapping technique in early production is the Levallois technique, which utilizes

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