AR101 Lecture Notes - Taphonomy, Radiometric Dating, Issf 10 Meter Air Rifle
26 Aug 2013
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Discovered in 1974 by donald johnson & colleagues. Lucy = 3. 2 mill year old skeleton of a australopithecus afarensis named after the beatles song, Think about: the significance of the find, conditions leading to preservation, conditions necessary for discovering fossil hominids, conditions permitting the use of what type of dating technique. Lucy = also known as al 288-1 is represented by hundreds of bone fragments comprising approximately 40% of the skeleton of an australopithecus afarensis individual. Lucy is estimated to have lived 3. 2 million years ago, is approx 1. 1 min (3"7 ) tall and 29kg (64lbs) While maintaining a small oranial capacity (430cc) her skeleton provides evidence for upright posture & bipedalism. Sunk into soft lake sediments & decomposes; undiscovered by scavangers. Sand & gravel washed in by heavy rains covers bones. Minerals from sediments replace calcium in bones turns it into stone.
