Information About ™Laetoli |
| CATEGORIES ABOUT LAETOLI | |
| archaeological sites in tanzania | |
| history of tanzania | |
| early hominids | |
| fossils | |
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Date The site is Pliocene , dated by the K/Ar Method to 3.7 million years ago. The footprints A line of Hominid footprints, discovered in 1976 - 77 by Mary Leakey , Richard Hay and their team, is preserved in powdery ash from an eruption of the 20 km distant Sadiman Volcano . Soft rain cemented the ash-layer (15 cm thick) to Tufa without destroying the prints. In time, they were covered by other ash deposits. The Hominid prints were produced by three individuals, one walking in the footprints of the other, making the original tracks difficult to discover. As the tracks lead in the same direction, they might have been produced by a group- but there is nothing else to support the common reconstruction of a nuclear family visiting the waterhole together.
The footprints demonstrate that the Hominid s walked upright habitually, as there are no knuckle-impressions. The feet do not have the mobile big toe of apes; instead, they have an arch (the bending of the sole of the foot) typical of modern humans. They seem to have moved in a leisurely stroll. Other animals Other prints show the presence of twenty other animal species, among them Hyena s, wild cats ( Machairodont ), Baboon s, Wild Boar , Giraffe s, Gazelle s, Rhino s, several kinds of Antelope , Hipparion , Buffalo , elephants (of the extinct '' Deinotherium '' genus), Hare and Bird s. Traces of raindrops can be seen as well. Few prints are superimposed, which indicates that they were rapidly covered up again. Most of these animals are represented by skeletal remains as well. Human remains The remains of 13 Hominid s have been found, mainly Mandible s and Teeth . They show affinities to the female skeleton Lucy from Hadar, Ethiopia . Most scholars classify them as '' Australopithecus Afarensis '', but some stress the greater similarity to '' Homo '' and prefer to speak of ''Homo sp. indet.'' A rather complete skull found at Ngaloba in 1976 has been dated to ca. 120 000-100 000 years BC. It is very modern anatomically, with a Cranial Capacity of ca. 1.200 cm³, but the forehead is still very low. Artifacts No Artifact s have been found in the vicinity. It is probable that stone was not yet used for tool production. Further reading
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