Final answer:
The technique of striking one stone with another to create tools or weapons by removing flakes is known as lithic reduction, notably used in the Solutrean tool industry.
Step-by-step explanation:
The process of striking one stone with another to break pieces off is called lithic reduction, which is often performed via percussion or pressure flaking. The Solutrean tool industry, for example, produced finely worked bifacial points employing this technique, which differs from the more commonly known flint knapping. Lithic reduction involves holding the lithic core and striking it with a hammer or percussor to remove flakes and ultimately shape the stone into tools or weapons. This method was pivotal in our prehistoric past, facilitating the creation of tools that were essential for survival and progression.