The pieces of stone struck off a rock in the reduction sequence (flintknapping), each usually having a striking platform, bulb of percussion, and similar identifying features. There are three main types of flakes: Primary: A flake that has substantial amounts of cortex on it and that was one of the first flakes removed from the core when the stone was initially broken open. Secondary: A flake that may have some cortex on its surface and that was removed during the rough shaping of a stone tool. Tertiary: A flake that has no cortex on it and that was removed during the final shaping of a stone tool.
Kernels of grain steam conditioned prior to extensive rolling to result in thin flat particles.
Thin pieces of stone that are removed from larger pieces of stone during the process of making a stone tool (this process is also known as " flintknapping"). In ancient times, most flakes were thrown away as garbage, but others were used as tools themselves. With their sharp edges, some flakes can be used for cutting, scraping, or gouging. Flakes are among the most common artifacts found at archaeological sites.