What type of tool consists of a core with a flattened stone with two faces made by Homo erectus?

The Acheulian tool type is characterized by bifacial tools, which are shaped on both sides to create a sharp edge. This type of tool was predominantly used by Homo erectus and represents a significant advancement in tool-making technology compared to the earlier Oldowan tools. The classic example of an Acheulian tool is the hand axe, which has a characteristic teardrop shape, formed by flaking stone to create sharp edges on both faces. This allowed for more efficient cutting and processing of materials. The bifacial nature of these tools indicates a higher level of planning and skill in the tool-making process, showcasing the cognitive abilities of Homo erectus in adapting their tools for specific functions.