Sentences with phrase «sharp stone flakes»

A flint - knapper makes sharp stone flakes by striking a flint «core» with a hammerstone.

Capuchin monkeys in Brazil produce sharp stone flakes, a behavior believed to be unique to humans and their ancestors.

To start, the trio butchered a sheep carcass with sharp stone flakes and found that the cutmarks indeed resembled those found on two different Australopithecine fossil arm bones — one dating to 4.2 million years ago and the other to 3.4 million years ago — as well as 2.5 - million - year - old animal bones discovered near the known stone tools in the Olduvai Gorge.

Not exact matches

«More than 2,600 sharp - edged flakes, flake fragments, and cores (cobbles from which flakes have been removed), found in the fine - grained sediments of a dry riverbed in the Afar region of Ethiopia, have been dated to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the known date at which humans were making stone tools.»

This technology, named after the famous Olduvai Gorge in Tanzania where archaeologists Louis and Mary Leakey discovered the implements in the 1930s, consists of hitting a stone «core» with a stone «hammer» in such a way that a flake sharp enough to butcher an animal is struck off.

Stone artifacts unearthed in the same sediment as the fossil jaw included chunks of rock from which sharp flakes were pounded off and used as cutting tools.

Archaeologists have long considered the advent of the Levallois method of making stone tools — a strategy for obtaining broad, thin, sharp flakes from a chunk of stone called a core — to be a significant development in human prehistory.

The maker mainly used a two - handed technique, holding a core on another large rock, or anvil, and hitting it with a hammer stone to release sharp flakes.