Oldowan

The Oldowan, often spelled Olduwan or Oldawan, is the archaeological term used to refer to the earliest stone tool industry in prehistory, being used during the Lower Paleolithic period, 2.6 million years ago up until 1.7 million years ago, by Hominines. It was followed by the more sophisticated Acheulean industry.

The term "Oldowan" is taken from the site of Olduvai Gorge in Tanzania, where the first Oldowan tools were discovered by the archaeologist Louis Leakey in the 1930s. However, some contemporary archaeologists and palaeoanthropologists prefer to use the term "Mode One" tools to designate Oldowan tools, with "Mode Two" designated Acheulean ones and so forth.

It is not known for sure which hominin species actually created and used Oldowan tools. Its emergence is often associated with the species Australopithecus garhi, and its flourishing with early species of Homo such as H. habilis and H. ergaster. Early Homo erectus appears to inherit Oldowan technology and refines it into the Acheulean industry beginning 1.7 million years ago. Oldowan tools are sometimes called "pebble tools," so named because the blanks chosen for their production already resemble, in pebble form, the final product. Oldowan tools are sometimes subdivided into types, such as chopper, scrapers and pounders, as these appear to have been their main uses.