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Our research suggests that the flake is the earliest securely-dated artifact from Turkey ever recorded and was dropped on the floodplain by an early hominin well over a million years ago.
We observed markings on the flake that clearly suggest it had been struck with force by a hard hammer or other stone tool, making it highly unlikely that it was shaped by natural processes.
The oldest hominin fossils in western Anatolia, attributed to Homo erectus, were recovered in 2007 in the deposits of travertine at Kocabaş in the Denizli basin – about 100 km south of where the flake was discovered – but their dating were uncertain.
A rock that has been shaped due to striking will be different from one formed naturally. Usually it will have finer edges and evidence of pressure scars from the impact site. Sometimes the edges are partially serrated. They also look out of place.
Rock material could have been transported to the floodplain but you would see a large amount of similar material there. When I find artefacts like this its almost always (99.9%) of a rock type that is not found nearby, and therefore sticks out.
Not only that, but the shape and size of a rock fragment determines how far it has traveled from its source. Further from the source and the fragments will be smaller and more similarly shaped (sand, for example). Closer to the source and the rocks will vary in both size and shape (eg. a broken boulder in many pieces).
You can see in the article that this rock fragment is quite angular and rather large, which is different from the usual small sediments or rounded rocks you would find in a floodplain/river meander.
originally posted by: deckdel
a reply to: Pistoche
1.2 million years of hammering stones together... and waiting something better to come by.
Lets say they kept on hammering those stones for 200,000 years, that is awfully lot of time for avoiding thinking any better way of cutting skin out of a deer. Even so, there would be 1000,000 yeaaars left for fixing something better. Boats, sails, arrows, huts and stuff, & getting organised for global dominance. Does not require much to get on level of middle ages - requires darn nothing.
How did they survive the boredom?
they can probably see tool marks or knapping patterns in the edges. random chips look different from deliberate knapping. one would expect though that the first human to make a sharp edge deliberately would have been banging rocks to get accidental cleavage lines that were long enough and sharp enough to cut. i don't know how long it would take for it to occur to a rock breaker that fine adjustments to the cleavage plain were possible with hardened pointy sticks or antlers. but i do know at least with modern man and neanderthals we greatly underestimate thier sophistication because we naturally think our intellect superior to say bronze age people. though actually they knew how to do lots of things we did not credit them with. Heck until recently we could not even beat roman concrete even with our advanced science.
originally posted by: intrptr
a reply to: Pistoche
…was dropped on the floodplain by an early hominid well over a million years ago.
Dating a bit of "chipped" rock doesn't tell when the "chipping" occurred or how it occurred.
originally posted by: skalla
a reply to: deckdel
Well made stone tools would probably really surprise you in how effective they are. You could skin a deer with a single flint flake no bigger than the palm of your hand and then most likely butcher the thing wit that same flake too. That flake would take all of a second to make.
For working flesh and wood, stone can be a real shock when you first give it a try.
Though not approved by the US Food and Drug Administration (FDA) for use on humans, obsidian is used by some surgeons for scalpel blades, as well-crafted obsidian blades have a cutting edge many times sharper than high-quality steel surgical scalpels, the cutting edge of the blade being only about 3 nanometers thick.[36] Even the sharpest metal knife has a jagged, irregular blade when viewed under a strong enough microscope; when examined even under an electron microscope an obsidian blade is still smooth and even.[37] One study found that obsidian incisions produced fewer inflammatory cells and less granulation tissue at 7 days, in a group of rats.[38] Don Crabtree produced obsidian blades for surgery and other purposes,[36] and has written articles on the subject. Obsidian scalpels may currently be purchased for surgical use on research animals.
originally posted by: intrptr
a reply to: Pistoche
…was dropped on the floodplain by an early hominid well over a million years ago.
Dating a bit of "chipped" rock doesn't tell when the "chipping" occurred or how it occurred.
originally posted by: deckdel
a reply to: Pistoche
1.2 million years of hammering stones together... and waiting something better to come by.
Lets say they kept on hammering those stones for 200,000 years, that is awfully lot of time for avoiding thinking any better way of cutting skin out of a deer. Even so, there would be 1000,000 yeaaars left for fixing something better. Boats, sails, arrows, huts and stuff, & getting organised for global dominance. Does not require much to get on level of middle ages - requires darn nothing.
How did they survive the boredom?
originally posted by: skalla
a reply to: deckdel
Well made stone tools would probably really surprise you in how effective they are. You could skin a deer with a single flint flake no bigger than the palm of your hand and then most likely butcher the thing wit that same flake too. That flake would take all of a second to make.
For working flesh and wood, stone can be a real shock when you first give it a try.